Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(116)
- Şahin, Engin(48)
- Kaya, Yunus(46)
- Özen, Soner(46)
- İspirli, Hümeyra(45)
- Pat, Suat(44)
- Şenay, Volkan(42)
- Korkmaz, Şadan(36)
- Yilmaz, Mustafa Tahsin(33)
- Kutlu, Naciye(32)
- Cuce, Erdem(31)
- Öner, Erdal(31)
- Artar, Musa(30)
- Ertugrul, Mehmet(29)
- Hasar, Ugur Cem(29)
- Mercan, Emin(28)
- Bayraktar, Bülent(27)
- Bayram, Sinan(27)
- Can, Zehra(25)
- Ecem Bayram, Nesrin(25)
- Çolak, Murat(23)
- Özdemir, Akın(23)
- Cuce, Pinar Mert(22)
- Sert, Durmuş(22)
- Ayata, Ümit(21)
- Bayram, Ozkan(21)
- Dirican, Ebubekir(20)
- Abdioglu, Murat(19)
- Ayazoglu, Rabil(19)
- Birinci, Ahmet(19)
- Kamiloğlu, Aybike(19)
- Gerçek, Yusuf Can(18)
- Taylan, Osman(18)
- Tozlu, Alperen(18)
- Gul, Volkan(15)
- Hasar, Ugur C.(15)
- Kadakal, Mahir(15)
- Sagdic, Osman(15)
- Ergün, Mustafa(14)
- Kadakal, Huriye(14)
Yayınlar
- MakaleYalnız künye2016EFFECT OF IN SITU EXOPOLYSACCHARIDE PRODUCTION ON SENSORY PROPERTIES OF TURKISH-TYPE FERMENTED SAUSAGE
Yilmaz, Mustafa Tahsin; Toker, Omer Said; Tatlisu, Nevruz Berna; Arici, Muhammet; Dertli, Enes
In this study, effect of in situ exopolysaccharide (EPS) production on sensory properties of Turkish-type fermented sausage (sucuk) was determined. Sausage mixes were prepared as four groups: (a) Control group, control sausage samples produced without LAB addition, with natural flora, (b) Strain 1 group, sausage samples produced by using Strain 1 (EPS+ Lactobacillus plantarum 162 R strain), (c) Strain 2 group: sausage samples produced by using Strain 2 (EPS+ Leuconostoc mesenteroides N6) and (d) Mixture group, sausage samples produced by using mixture of Strain 1 and Strain 2. These mixes were fermented at 14, 16 and 18 degrees C for 8, 12 and 16 days. Fermentation conditions remarkably affected the sensory properties of the sausage using different EPS producing EPS. These results of this study demonstrated the importance of in situ EPS production on final sensory properties of sausage.
AtıfWoS1
İncele - MakaleYalnız künye2016The Effects of Boron Alloying on the Structural and Optical Properties of GaAs Deposited by a Thermionic Vacuum Arc Method
Pat, Suat; Korkmaz, Sadan; Özen, Soner; Senay, Volkan
This study reports the influence of the boron alloying on the structural and optical properties of GaAs compound for the first time. UV-Vis-NIR spectrophotometer, interferometer, photoluminescence spectrophotometer, X-ray diffraction, field emission scanning electron microscopy, and atomic force microscopy tools were used for the determination of the structural and optical properties. As results, boron atoms affect the bang gap to upper energy level with very small variations. But, structural properties and grain dimensions of GaAs have improved by adding boron atoms. The results show that used method, thermionic vacuum arc, is the fast, direct, environmental and very easy-doped BGaAs ternary compounds deposition method according to other methods. Finally, this method is a promising method for GaAs technology.
AtıfWoS2OpenAlex4İncele - MakaleAçık Erişim2016Scopus SJRQ1Experimental determination of Drucker-Prager yield criterion parameters for normal and high strength concretes under triaxial compression
Öztekin, Ertekin; Pul, Selim; Hüsem, Metin
In this study, parameters which define Drucker-Prager yield criterion were investigated experimentally for both normal strength concrete (NSC) and high strength concrete (HSC) by triaxial compression tests. Total 16 concrete series with different concrete strength were produced. While 8 concrete series were produced as NSC (20 MPa < fcm < 55 MPa), other 8 series were produced as HSC (55 MPa < fcm < 85 MPa). Each series contains 16 specimens. Triaxial compression tests were performed on these concrete specimens. Concrete compressive strength of the specimens were measured under 4 different lateral compression level (0, 1, 2 and 4 MPa). After Mohr circles were drawn by using the data obtained from triaxial compression tests, the values of cohesion were determined between 5 MPa and 13 MPa for NSC and 13 MPa and 19 MPa for HSC. The values of internal friction angle were also obtained between 27° and 34° for NSC, 34° and 39° for HSC from the Mohr circles. The parameters defining the Drucker-Prager yield criterion were determined by using the values of cohesion and internal friction angle. Finally, after some equations were proposed to calculate the parameters by using concrete compressive strength, the validation of these equations were also proved in this study.
AtıfScopus83WoS74
İncele - MakaleAçık Erişim2016Scopus SJRQ1Improvement in performance properties of asphalt using a novel boron-containing additive
Oruç, Şeref; Yılmaz, Bahadır
In current times, many additives are used to improve the performance characteristics of asphalt. In this study, a new additive that contains boron, given the short name of cyclic borate ester (CBE), was chemically synthesised in laboratory conditions. It was added to the asphalt binder as 1%, 2%, 4% and 6% ratios of asphalt by weight, and modified asphalt samples were produced. The effects of CBE on the conventional properties of asphalt binder (penetration, softening point, ductility, flash point, Fraass breaking point) were examined using a dynamic shear rheometer, rotational viscosity, a rolling thin film oven, a pressure aging vessel and bending beam rheometer test methods. Results showed that the use of CBE additive increased the hardness, softening point, viscosity, flash-point value and rutting resistance of asphalt binder and decreased temperature sensitivity. CBE also enhanced elastic responses (increased complex shear modulus and decreased phase angle), aging resistance and low-temperature cracking resistance and did not change the cohesion property.
AtıfScopus25WoS24OpenAlex28İncele - MakaleAçık Erişim2016Scopus SJRQ2Maximizing deviation method for neutrosophic multiple attribute decision making with incomplete weight information
Şahin, Rıdvan; Liu, Peide
This paper develops a method for solving the multiple attribute decision-making problems with the single-valued neutrosophic information or interval neutrosophic information. We first propose two discrimination functions referred to as score function and accuracy function for ranking the neutrosophic numbers. An optimization model to determine the attribute weights that are partly known is established based on the maximizing deviation method. For the special situations where the information about attribute weights is completely unknown, we propose another optimization model. A practical and useful formula which can be used to determine the attribute weights is obtained by solving a proposed nonlinear optimization problem. To aggregate the neutrosophic information corresponding to each alternative, we utilize the neutrosophic weighted averaging operators which are the single-valued neutrosophic weighted averaging operator and the interval neutrosophic weighted averaging operator. Thus, we can determine the order of alternatives and choose the most desirable one(s) based on the score function and accuracy function. Finally, some illustrative examples are presented to verify the proposed approach and to present its effectiveness and practicality.
AtıfScopus151WoS130OpenAlex148İncele - MakaleAçık Erişim2016Scopus SJRQ1Electrorheological Fluids Equations Involving Variable Exponent with Dependence on the Gradient via Mountain Pass Techniques
Mashiyev, R. Ayazoglu; Ekincioglu, Ismail
This article deals with a quasilinear elliptic equation with variable exponent under a homogenous Dirichlet boundary-value condition, where nonlinearity also depends on the gradient of the solution. By using an iterative method based on Mountain Pass techniques, the existence of a positive solution is obtained.
AtıfScopus11WoS10OpenAlex13İncele - MakaleAçık Erişim2016Scopus SJRQ1Use of Q-learning approaches for practical medium access control in wireless sensor networks
Kosunalp, Selahattin; Chu, Yi; Mitchell, Paul D.; Grace, David; Clarke, Tim
This paper studies the potential of a novel approach to ensure more efficient and intelligent assignment of capacity through medium access control (MAC) in practical wireless sensor networks. Q-Learning is employed as an intelligent transmission strategy. We review the existing MAC protocols in the context of Q-learning. A recently-proposed, ALOHA and Q-Learning based MAC scheme, ALOHA-Q, is considered which improves the channel performance significantly with a key benefit of simplicity. Practical implementation issues of ALOHA-Q are studied. We demonstrate the performance of the ALOHA-Q through extensive simulations and evaluations in various testbeds. A new exploration/exploitation method is proposed to strengthen the merits of the ALOHA-Q against dynamic the channel and environment conditions.
AtıfScopus41WoS29OpenAlex37İncele - MakaleAçık Erişim2016Scopus SJRQ1EpsA is an essential gene in exopolysaccharide production in Lactobacillus johnsonii FI9785
Dertli, Enes; Mayer, Melinda J.; Colquhoun, Ian J.; Narbad, Arjan
Lactobacillus johnsonii FI9785 has an eps gene cluster which is required for the biosynthesis of homopolymeric exopolysaccharides (EPS)-1 and heteropolymeric EPS-2 as a capsular layer. The first gene of the cluster, epsA, is the putative transcriptional regulator. In this study we showed the crucial role of epsA in EPS biosynthesis by demonstrating that deletion of epsA resulted in complete loss of both EPS-1 and EPS-2 on the cell surface. Plasmid complementation of the epsA gene fully restored EPS production, as confirmed by transmission electron microscopy and nuclear magnetic resonance (NMR) analysis. Furthermore, this complementation resulted in a twofold increase in the expression levels of this gene, which almost doubled amounts of EPS production in comparison with the wild-type strain. Analysis of EPS by NMR showed an increased ratio of the heteropolysaccharide to homopolysaccharide in the complemented strain and allowed identification of the acetylated residue in EPS-2 as the (1,4)-linked βGlcp unit, with the acetyl group located at O-6. These findings indicate that epsA is a positive regulator of EPS production and that EPS production can be manipulated by altering its expression.
AtıfScopus43WoS38OpenAlex39
İncele - MakaleYalnız künye2016Scopus SJRQ1Optical, structural, morphological and compositional characterization of a Co-doped GaAs semiconducting thin film produced by thermionic vacuum arc
Şenay, Volkan; Özen, Soner; Pat, Suat; Korkmaz, Şadan
A 80 nm 2 at% Co-doped GaAs thin film was deposited on a glass substrate under a high vacuum condition by means of the thermionic vacuum arc technique using GaAs and Co pellets as source materials. Tools and techniques such as an optical reflectometer, XRD, UV-VIS-NIR spectrophotometer, FESEM, EDX, and AFM were employed to investigate some of the physical properties of the produced film. From the optical investigations, the refractive index at 632.8 nm and optical band gap of the film were determined to be 3.60 and 1.42 eV respectively. XRD characterization indicated that the film contained GaAs and Co phases. A uniform surface morphology with fine grain covering the entire surface was observed through the FESEM and AFM studies, while 30 nm grain size and 2.72 nm root mean square roughness were obtained. The EDX analysis also confirmed the presence of Ga, As and Co in the film.
AtıfScopus19WoS17OpenAlex18İncele - MakaleAçık Erişim2016Scopus SJRQ1Effects of milk somatic cell counts on some physicochemical and functional characteristics of skim and whole milk powders
Sert, Durmuş; Mercan, Emin; Aydemir, Serdar; Civelek, Mustafa
The aim of this work was to study the influence of milk somatic cell count (SCC) levels on spray-dried milk powders. For this reason, 3 cow milks with different SCC (<300,000, 300,000-700,000, >700,000 SCC/mL) were processed into skim (SMP) and whole milk powder (WMP). The effect of SCC on the physicochemical and functional characteristics of the milk powders and textural properties of set-type yogurts produced from reconstituted milk powders with different SCC was evaluated. A crucial difference was noted between milk powders depending on different SCC. Protein values and ash content of powder samples decreased correlatively with increasing SCC. The hydroxymethylfurfural content of SMP was higher than WMP. We noted an increase in hydroxymethylfurfural content of both SMP and WMP depending on elevated SCC. Solubility index of SMP and WMP was 1.280 to 1.632 and 0.940 to 1.208 mL, respectively; with increasing SCC, solubility index was affected adversely. The highest foam stability was determined in SMP containing >700,000 SCC. Bulk density of SMP and WMP was between 0.682 and 0.708 and 0.660 to 0.685 g/cm3, respectively. An increase was observed in scorched particle of both SMP and WMP depending on increasing SCC. We found significant differences in particle size distribution of milk powders produced from milk with SCC at different levels. Although WMP had more uniform and big particle structure, SMP had more specific area. A negative correlation was noted between yogurt texture and SCC. Results indicate that milk SCC has negative influences on milk powder quality.
AtıfScopus24WoS18OpenAlex27İncele - MakaleYalnız künye2016Scopus SJRQ2Optical and surface properties of optically transparent Li3PO4 solid electrolyte layer for transparent solid batteries
Pat, Suat; Özen, Soner; Şenay, Volkan; Korkmaz, Şadan
In this study, optical and surface properties of the optically transparent Li3PO4 solid electrolyte layer for transparent solid battery have been investigated for the first time. To determine the optical properties, transmittance, absorbance, reflection, refractive index spectra, and optical band gap were determined by UV-Vis spectrophotometer and optical interferometer. The surface property of the transparent Li3PO4 solid electrolyte was analyzed using atomic force microscopy. One another important parameter is contact angle (CA) surface free energy (SFE). CA and SFE were determined by optical tensiometer. These values probably are a most important parameter for polymer and hybrid battery performance. For the best performance, value of CA should be low. As a result, solid electrolyte layer is a highly transparent and it has a high wettability. SCANNING 38:317–321, 2016.
AtıfScopus12WoS13OpenAlex13İncele - MakaleYalnız künye2016Scopus SJRQ1Optimization of strength, ductility and electrical conductivity of Cu-Cr-Zr alloy by combining multi-route ECAP and aging
Purcek, G.; Yanar, H.; Demirtas, M.; Alemdag, Y.; Shangina, D.V.; Dobatkin, S.V.
Properties of Cu-Cr-Zr alloy with ultrafine-grained (UFG) structure produced by equal-channel angular pressing (ECAP) via different routes have been investigated. Special attention was paid to the optimization of multi-functional structural, thermal, electrical and mechanical properties of the alloy by aging of UFG one. Multi-pass ECAP via different routes gives rise to the formation of a deformation-induced submicrocrystalline structure with the grain (subgrain) sizes in the range of 200-300. nm depending on applied routes which leads to high hardness and strength in the Cu-Cr-Zr alloy with reduced ductility. Amongst the applied routes, route-Bc was found to be the best processing path for achieving the lowest grain size, the highest hardness and strength. Aging of 8Bc-processed UFG samples increases the hardness and strength of Cu-Cr-Zr alloy while retaining an electrical conductivity comparable to that of aged coarse-grained (CG) one. A satisfactory electrical conductivity of 71%IACS without considerable loss of peak hardness was achieved after aging of 8Bc-processed UFG alloy at 425. °C for 240. min. The precipitation strengthened UFG alloy remains its stable behavior at elevated temperatures up to 450. °C.
AtıfScopus164WoS147OpenAlex151İncele - BildiriYalnız künye2016Some physical properties of Co-doped GaAs thin films grown by thermionic vacuum arc
Şenay, Volkan; Özen, Soner; Pat, Suat; Korkmaz, Şadan; Mohammadigharehbagh, Reza; Akkus, B.; Dogan, G.S.; Mutlu, R.B.C.; Yalcin, L.S.; Oktem, Y.
Cobalt doped GaAs thin films with the thickness of 100 nm and 200 nm were deposited on glass substrates by a thermionic vacuum arc system. The optical and surface properties were investigated as functions of the film thickness. The refractive index of the films decreased with the increasing thickness. A band gap value of 1.42 eV was obtained for the 100 nm film and 1.38 eV for the 200 nm film from the Tauc plots of (αhν)2 vs. hν. According to the results obtained from the AFM studies, the root mean square surface roughness of the films were nm and 3.13 nm for the 100 nm and 200 nm film, respectively.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2016Scopus SJRQ1A receding contact problem between a functionally graded layer and two homogeneous quarter planes
Adıyaman, Gökhan; Birinci, Ahmet; Öner, Erdal; Yaylacı, Murat
In this paper, the plane problem of a frictionless receding contact between an elastic functionally graded layer and two homogeneous quarter planes is considered when the graded layer is pressed against the quarter planes. The top of the layer is subjected to normal tractions over a finite segment. The graded layer is modeled as a non-homogeneous medium with a constant Poisson’s ratio and exponentially varying shear modules. The problem is converted into the solution of a Cauchy-type singular integral equation in which the contact pressure and the receding contact half-length are the unknowns using integral transforms. The singular integral equation is solved numerically using Gauss–Jacobi integration. The corresponding receding contact half-length that satisfies the global equilibrium condition is obtained using an iterative procedure. The effect of the material non-homogeneity parameter on the contact pressure and on the length of the receding contact is investigated.
AtıfScopus58WoS55OpenAlex42İncele - MakaleYalnız künye2016Scopus SJRQ2ANN based investigations of reliabilities of the models for concrete under triaxial compression
Öztekin, Ertekin
Purpose - A lot of triaxial compressive models for different concrete types and different concrete strength classes were proposed to be used in structural analyses. The existence of so many models creates conflicts and confusions during the selection of the models. In this study, reliability analyses were carried out to prevent such conflicts and confusions and to determine the most reliable model for normal- and high-strength concrete (NSC and HSC) under combined triaxial compressions. The paper aims to discuss these issues. Design/methodology/approach - An analytical model was proposed to estimate the strength of NSC and HSC under different triaxial loadings. After verifying the validity of the model by making comparisons with the models in the literature, reliabilities of all models were investigated. The Monte Carlo simulation method was used in the reliability studies. Artificial experimental data required for the Monte Carlo simulation method were generated by using artificial neural networks. Findings - The validity of the proposed model was verified. Reliability indexes of triaxial compressive models were obtained for the limit states, different concrete strengths and different lateral compressions. Finally, the reliability indexes were tabulated to be able to choose the best model for NSC and HSC under different triaxial compressions. Research limitations/implications - Concrete compressive strength and lateral compression were taken as variables in the model. Practical implications - The reliability indexes were tabulated to be able to choose the best model for NSC and HSC under different triaxial compressions. Originality/value - A new analytical model was proposed to estimate the strength of NSC and HSC under different triaxial loadings. Reliability indexes of triaxial compressive models were obtained for the limit states, different concrete strengths and different lateral compressions. Artificial experimental data were obtained by using artificial neural networks. Four different artificial neural networks were developed to generate artificial experimental data. They can also be used in the estimations of the strength of NSC and HSC under different triaxial loadings.
AtıfScopus5WoS5OpenAlex6İncele - MakaleAçık Erişim2016Scopus SJRQ4Karyotype analyses of the genus Matthiola (Brassicaceae) in Turkey
Martin, Esra; Ünal, Murat; Doǧan, Bekir; Altinordu, Fahim; Sefali, Abdurrahman; Kaya, Ayla
In the present paper, karyotype analyses are reported for 12 taxa of Matthiola from Turkey. Matthiola trojana Dirmenci, Satil & Tümen, M. odoratissima (Pall.) R.Br., M. anchonifolia Hub.-Mor., M. montana Boiss., M. fruticulosa (L.) Maire ssp. fruticulosa and M. ovatifolia (Boiss.) Boiss. counted 2n=12 chromosomes, and M. incana (L.) R.Br., M. longipetala (Vent.) DC. ssp. bicornis (Sibth. et Smith) P. W. Ball, M. longipetala (Vent.) DC. ssp. longipetala, M. longipetala (Vent.) DC. ssp. pumilio (Sibth. & Smith) P. W. Ball, M. sinuata (L.) R.Br., and M. tricuspidata (L.) R.Br. showed 2n=14 chromosomes. The idiograms and karyomorphometric data obtained by using Image Analysis System (Bs200Pro). The chromosome number of M. montana was determined for the first time. Also, karyotype asymmetry index such as MCA, CVCL and CVCL were measured for the reconstruction of karyological relationships.
AtıfScopus9WoS7OpenAlex7İncele - MakaleAçık Erişim2016Scopus SJRQ1An experimental study on the ultra-fine grinding of gypsum ore in a dry ball mill
Öksüzoğlu, Bilge; Uçurum, Metin
Gypsum is a crystalline form of hydrated calcium sulfate (CaSO4·2H20) generally used in cements and plasters in the construction industry, though also in paints, fertilizers, medicines, papers, and textiles. For use in these materials, gypsum must be ground finely (<100 μm), if not ultra-finely (<10 μm), for which ball mills are most effective. Despite gypsum's widespread use and the regular need to grind it, studies concerning the grinding of gypsum ore remain scarce. In response, in this study, we have systematically investigated how certain grinding parameters (i.e., mill speed, ball filling ratio, ball size distribution, powder filling ratio, grinding aid ratio, and grinding time) of conventional dry ball mills affect the grindability of gypsum ore. We determined the properties of the micronized gypsum products obtained in optimal grinding conditions, and the results showed that the dry ball mill grinding process can effectively produce ultra-fine gypsum products.
AtıfScopus38WoS32OpenAlex42İncele - MakaleYalnız künye2016Scopus SJRQ3On the boundedness of a B-Riesz potential in the generalized weighted B-Morrey spaces
Ayazoglu, Rabil; Hasanov, Javanshir J.
We consider the generalized shift operator associated with the Laplace-Bessel differential operator Δ B = i=1 n 2 x i 2 +i=1 k γ i x ix i .Δ -B=Σ -i=1ⁿ(∂ ²)/(∂ x-i²) +Σ -i=1^k (γ -i)/(x-i)(∂)/(∂ x-i). The maximal operator M γ M-γ (B-maximal operator) and the Riesz potential I α,γ I-α ,γ (B-Riesz potential), associated with the generalized shift operator are investigated. We prove that the B-maximal operator M γ M-γ and the B-singular integral operator are bounded from the generalized weighted B-Morrey space p,ω 1 ,φ,γ (k,+ n )cal M-p,ω -1,φ ,γ (ℝ-k,+ⁿ) to p,ω 2 ,φ,γ (k,+ n )cal M-p,ω -2,φ ,γ (ℝ-k,+ⁿ) for all 1<p<1 < p < ∞ , φA p,γ (k,+ n )φ ∈ A-p,γ (ℝ-k,+ⁿ) . Furthermore, we prove that the B-Riesz potential I α,γ I-α ,γ , 0<α<n+|γ|0<α <n+|γ | , is bounded from the generalized weighted B-Morrey space p,ω 1 ,φ,γ (k,+ n )cal M-p,ω -1,φ ,γ (ℝ-k,+ⁿ) to q,ω 2 ,φ,γ (k,+ n )cal M-q,ω -2,φ ,γ (ℝ-k,+ⁿ) , where α/(n+|γ|)=1/p-1/qα /(n+|γ |)=1/p-1/q , 1<p<(n+|γ|)/α1<p<(n+|γ |)/α , φA 1+q/p ' ,γ (k,+ n )φ ∈ A-1+q/p^′,γ (ℝ-k,+ⁿ) and 1/p+1/p ' =11/p+1/p^′=1 .
AtıfScopus2WoS2OpenAlex2İncele - MakaleAçık Erişim2016Scopus SJRQ1Fuzzy multicriteria decision making method based on the improved accuracy function for interval-valued intuitionistic fuzzy sets
Şahin, Rıdvan
A new accuracy function for the theory of interval-valued intuitionistic fuzzy set, which overcomes some difficulties arising in the existing methods for determining rank of interval-valued intuitionistic fuzzy numbers, is proposed by taking into account the hesitancy degree of interval-valued intuitionistic fuzzy sets. By comparing it with several proposed accuracy functions, the necessity and efficiency of our accuracy function are provided by giving related examples. A fuzzy multicriteria decision making method is established to select the best alternative in multicriteria decision making process which is taken as interval-valued intuitionistic fuzzy set of criterion values for alternatives. While aggregating the interval-valued intuitionistic fuzzy information corresponding to each alternative, we utilize the interval-valued intuitionistic fuzzy weighted aggregation operators. Then the accuracy degree of the aggregated interval-valued intuitionistic fuzzy information is computed via the new proposed accuracy function. Thus, we can rank all the alternatives according to the accuracy function and choose the optimal one(s). Finally, an illustrative example is given to demonstrate the practicality and effectiveness of the proposed approach.
AtıfScopus76WoS61OpenAlex83İncele - MakaleAçık Erişim2016Scopus SJRQ2Effect of external magnetic field on the Kβ/Kα X-ray intensity ratios of TixNi1-x alloys excited by 59.54 and 22.69 keV photons
Perişanoğlu, Ufuk; Alım, Bünyamin; Uğurlu, Mine; Demir, Lütfü
The effects of external magnetic field and exciting photon energies on the Kβ/Kα X-ray intensity ratios of various alloy compositions of Ti-Ni transition metal alloys have been investigated in this work using X-ray fluorescence spectroscopy. The spectrum of characteristic K-X-ray photons from pure Ti, pure Ni and TixNi1-x (x=0.30; 0.40; 0.50; 0.60; 0.70) alloys were detected with a high resolution Si (Li) solid-state detector. Firstly, Kβ/Kα X-ray intensity ratios of pure Ti, pure Ni and TixNi1-x alloys were measured following excitation by 59.54 keV γ-rays from a 200 mCi 241Am radioactive point source without any magnetic field and under 0.5 and 1 T external magnetic fields, separately. Later, the same measurements were repeated under the same experimental conditions for 22.69 keV X-rays from a 370 MBq109Cd radioactive point source. The results obtained for Kβ/Kα X-ray intensity ratios of pure Ti, pure Ni, Ti and Ni in various Ti-Ni alloys were evaluated in terms of both external magnetic field effect and exciting photon energy effect. When the results obtained for both exciting photon energies are evaluated in terms of changing of Kβ/Kα X-ray intensity ratios depending on the alloy composition, the tendency of these changes are observed to be similar. Also, Kβ/Kα X-ray intensity ratios for all samples examined have changed with increasing external magnetic field. Therefore, the results obtained have shown that Kβ/Kα X-ray intensity ratios of Ti and Ni in TixNi1−x alloys are connected with the external magnetic field. The present study makes it possible to perform reliable interpretation of experimental Kβ/Kα X-ray intensity ratios for Ti, Ni and TixNi1−x alloys and can also provide quantitative information about the changes of the Kβ/Kα X-ray intensity ratios of these metals with alloy composition.
AtıfScopus32WoS31OpenAlex32İncele