Pub Date : 2023-11-18DOI: 10.15330/pcss.24.4.595-602
P. Kashid, S. Mathad, Mahadev R. Shedam
This article presents the structural and mechanical properties of Co0,6Ni0,4-xCdxFe2O4spinel ferrite nanoparticles. The as prepared samples were characterized by thermo-gravimetric differential thermal analysis to examine their phase transition. TGA/DTA analysis confirmed the reaction is endothermic in nature and the process completion temperature around 714.24oC is good for annealing the prepared ferrite powder. X-ray diffraction pattern revealed, Co0,6Ni0,4-xCdxFe2O4 have been well crystallized to spinel crystal structure. The average crystallite size ranging from 14.52nm to 16.92nm. FTIR spectra showed, two significant absorption bands (ν1 and ν2) in between 400 cm−1and 600 cm−1confirmed the spinel structured ferrites. Morphological observations revealed, the grain size of prepared ferrites lies in the range 0.85 to 0.21 μm. Raman spectra peak positions of both tetrahedral and octahedral sublattice shifted towards higher energy position.
{"title":"Impact of Cd+2 substitutions on structural and mechanical properties of Co0.6Ni0.4-xCdxFe2O4 (0.00≤ x≤0.40) system","authors":"P. Kashid, S. Mathad, Mahadev R. Shedam","doi":"10.15330/pcss.24.4.595-602","DOIUrl":"https://doi.org/10.15330/pcss.24.4.595-602","url":null,"abstract":"This article presents the structural and mechanical properties of Co0,6Ni0,4-xCdxFe2O4spinel ferrite nanoparticles. The as prepared samples were characterized by thermo-gravimetric differential thermal analysis to examine their phase transition. TGA/DTA analysis confirmed the reaction is endothermic in nature and the process completion temperature around 714.24oC is good for annealing the prepared ferrite powder. X-ray diffraction pattern revealed, Co0,6Ni0,4-xCdxFe2O4 have been well crystallized to spinel crystal structure. The average crystallite size ranging from 14.52nm to 16.92nm. FTIR spectra showed, two significant absorption bands (ν1 and ν2) in between 400 cm−1and 600 cm−1confirmed the spinel structured ferrites. Morphological observations revealed, the grain size of prepared ferrites lies in the range 0.85 to 0.21 μm. Raman spectra peak positions of both tetrahedral and octahedral sublattice shifted towards higher energy position.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"56 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139261059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-18DOI: 10.15330/pcss.24.4.603-609
M.S. Kukurudzіak
The article examines the influence of the guard rings (GR) system structure on the dark currents of responsive elements (RE) and the actual guard rings of silicon 4-element p-i-n photodiodes (PD). The samples were made on the basis of p-silicon by planar technology. Samples with one, two, and three GR were produced. It was found that increasing the amount of n+-GRs does not reduce the dark current of the REs. But with an increase in the number of n+-GRs, the probability of an edge breakdown of the n+-p-junction in the regions of the exit of the hetero-junction of the GR to the surface increases. It is possible to reduce the levels of dark current of REs and GR by combining n+- and p+- guard regions, where p+-GR is a region of restriction of dark current leakage channels, isotypic with the substrate material. PD was made with p+-GR on the periphery of the crystal in the form of a concentric ring, as well as with a p+- region on the entire periphery of the crystal. This makes it possible to reduce the level of of dark current of n+- GR due to the reduction of the area of collection of charge carriers from the surface. But a significant decrease in the dark current of REs was not observed in such cases. We proposed to carry out boron diffusion in the gaps between REs and between REs and n+-GR.
文章研究了保护环（GR）系统结构对响应元件（RE）暗电流的影响，以及硅 4 元 pi-n 光电二极管（PD）的实际保护环。样品是在对硅的基础上通过平面技术制成的。样品有一个、两个和三个护环。研究发现，增加 n+-GR 的数量并不会降低 RE 的暗电流。但随着 n+-GRs 数量的增加，在 GR 的异质结通向表面的出口区域，n+-p 结边缘击穿的概率会增加。将 n+- 和 p+- 保护区结合起来可以降低 RE 和 GR 的暗电流水平，其中 p+-GR 是限制暗电流泄漏通道的区域，与衬底材料同型。PD 晶体外围的 p+-GR 呈同心环状，整个晶体外围也有 p+- 区域。这使得 n+- GR 的暗电流水平得以降低，因为电荷载流子从表面收集的面积减小了。但在这种情况下，并没有观察到 RE 暗电流的明显降低。我们建议在 REs 之间以及 REs 和 n+-GR 之间的间隙中进行硼扩散。
{"title":"The influence of the structure of guard rings on the dark currents of silicon p-i-n photodiodes","authors":"M.S. Kukurudzіak","doi":"10.15330/pcss.24.4.603-609","DOIUrl":"https://doi.org/10.15330/pcss.24.4.603-609","url":null,"abstract":"The article examines the influence of the guard rings (GR) system structure on the dark currents of responsive elements (RE) and the actual guard rings of silicon 4-element p-i-n photodiodes (PD). The samples were made on the basis of p-silicon by planar technology. Samples with one, two, and three GR were produced. It was found that increasing the amount of n+-GRs does not reduce the dark current of the REs. But with an increase in the number of n+-GRs, the probability of an edge breakdown of the n+-p-junction in the regions of the exit of the hetero-junction of the GR to the surface increases. It is possible to reduce the levels of dark current of REs and GR by combining n+- and p+- guard regions, where p+-GR is a region of restriction of dark current leakage channels, isotypic with the substrate material. PD was made with p+-GR on the periphery of the crystal in the form of a concentric ring, as well as with a p+- region on the entire periphery of the crystal. This makes it possible to reduce the level of of dark current of n+- GR due to the reduction of the area of collection of charge carriers from the surface. But a significant decrease in the dark current of REs was not observed in such cases. We proposed to carry out boron diffusion in the gaps between REs and between REs and n+-GR.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"11 5","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139262131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.15330/pcss.24.3.584-588
S. Mammadov, M. Gurbanov, L. Ahmadzade, A. Abishov
This research aims to examine the thermoluminescence (TL) properties of nano-sized alumina, including the relationship between TL intensity and absorbed dose, the identification of individual luminescence peaks, and determining trap parameters for use as a possible dosimeter. The samples were exposed to 530 to 2646 Gy doses from 60Co irradiation. The results show that micro-sized α-Al2O3 had a main dosimetry peak at Tm = 435 K, while nano-α-Al2O3 samples with particle sizes of 40 and 50 nm displayed a TL luminescence glow curve, with the primary dosimetry peak located in the low-temperature range and a complex structure at higher temperatures (above 500 K). The primary dosimetry peak was influenced by nanoparticle size, with a maximum of 460 K for the 40 nm sample and 467 K for the 50 nm sample. The main dosimetry peak was described by the superposition of two peaks
本研究旨在研究纳米氧化铝的热释光特性，包括热释光强度与吸收剂量之间的关系，单个发光峰的识别，以及确定可能用作剂量计的陷阱参数。这些样品受到60Co辐射的530至2646 Gy剂量。结果表明,微型α氧化铝在Tm主剂量学峰= 435 K,而纳米——α氧化铝样品颗粒大小40和50 nm显示一个TL发光发光曲线,与主剂量学峰位于低温范围和复杂结构在较高温度(高于500 K)。主要剂量学峰是影响纳米颗粒大小,最大的460 K 40 nm样本和467 K 50 nm样本。主剂量峰由两个峰的叠加来描述
{"title":"Thermoluminescence properties of nano-alumina with two different particle sizes","authors":"S. Mammadov, M. Gurbanov, L. Ahmadzade, A. Abishov","doi":"10.15330/pcss.24.3.584-588","DOIUrl":"https://doi.org/10.15330/pcss.24.3.584-588","url":null,"abstract":"This research aims to examine the thermoluminescence (TL) properties of nano-sized alumina, including the relationship between TL intensity and absorbed dose, the identification of individual luminescence peaks, and determining trap parameters for use as a possible dosimeter. The samples were exposed to 530 to 2646 Gy doses from 60Co irradiation. The results show that micro-sized α-Al2O3 had a main dosimetry peak at Tm = 435 K, while nano-α-Al2O3 samples with particle sizes of 40 and 50 nm displayed a TL luminescence glow curve, with the primary dosimetry peak located in the low-temperature range and a complex structure at higher temperatures (above 500 K). The primary dosimetry peak was influenced by nanoparticle size, with a maximum of 460 K for the 40 nm sample and 467 K for the 50 nm sample. The main dosimetry peak was described by the superposition of two peaks
","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135407342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.15330/pcss.24.3.578-583
G. Nychyporuk, V. Kordan, M. Horiacha, B. Halyatovskii, O. Hudzo, V. Zaremba, V. Pavlyuk
The influence of the substitution of indium by aluminum in HoNiIn compound at 873 K was investigated in the full concentration range by means of powder X-ray diffraction and EDX analysis. The formation of continuous solid solution was determined and changes of the unit cell parameters were calculated: HoNiIn1.0–0Al0–1.0 (ZrNiAl-type structure, space group P-62m, a = 0.74343(4)–0.69959(6) nm and c = 0.37472(3)–0.38289(4) nm, V = 0.17936(2)–0.16229(3) mn3). The best discharge capacity after electrochemical hydrogenation studies of HoNiIn1-xAlx solid solution is observed for battery prototypes with HoNiIn0.2Al0.8- and HoNiIn0.4Al0.6-based electrodes.
通过粉末x射线衍射和EDX分析，研究了873 K下全浓度范围内HoNiIn化合物中铝取代铟的影响。测定了连续固溶体的形成，计算了单元胞参数的变化:HoNiIn1.0-0Al0-1.0 (zrnial型结构，空间群P-62m, a = 0.74343(4) -0.69959 (6) nm, c = 0.37472(3) -0.38289 (4) nm, V = 0.17936(2) -0.16229 (3) mn3)。在采用HoNiIn0.2Al0.8-和honiin0.4 al0.6基电极的电池原型中，经电化学加氢研究，发现HoNiIn1-xAlx固溶体的放电容量最佳。
{"title":"Crystal structure and electrochemical hydrogenation of HoNiIn1-xAlx (x = 0-1) solid solution","authors":"G. Nychyporuk, V. Kordan, M. Horiacha, B. Halyatovskii, O. Hudzo, V. Zaremba, V. Pavlyuk","doi":"10.15330/pcss.24.3.578-583","DOIUrl":"https://doi.org/10.15330/pcss.24.3.578-583","url":null,"abstract":"The influence of the substitution of indium by aluminum in HoNiIn compound at 873 K was investigated in the full concentration range by means of powder X-ray diffraction and EDX analysis. The formation of continuous solid solution was determined and changes of the unit cell parameters were calculated: HoNiIn1.0–0Al0–1.0 (ZrNiAl-type structure, space group P-62m, a = 0.74343(4)–0.69959(6) nm and c = 0.37472(3)–0.38289(4) nm, V = 0.17936(2)–0.16229(3) mn3). The best discharge capacity after electrochemical hydrogenation studies of HoNiIn1-xAlx solid solution is observed for battery prototypes with HoNiIn0.2Al0.8- and HoNiIn0.4Al0.6-based electrodes.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135407286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the paper, a theoretical calculation of the coefficient of thermal conductivity of solid solutions of PbSnTe was carried out. The contribution of phonon scattering on substitution atoms to the effect of reducing thermal conductivity has been established. The composition of the PbSnTe solid solution, characterized by the lowest values of the lattice component of the thermal conductivity coefficient klat, was determined. The concentration of intrinsic charge carriers in solid solutions is calculated and their influence on the thermoelectric parameters of the material is shown.
{"title":"Analysis of heat conductivity mechanisms in PbSnTe solid solutions","authors":"O.Z Khshanovska, M.O. Halushchak, O.M. Matkivskyi, I.V. Horichok","doi":"10.15330/pcss.24.3.564-577","DOIUrl":"https://doi.org/10.15330/pcss.24.3.564-577","url":null,"abstract":"In the paper, a theoretical calculation of the coefficient of thermal conductivity of solid solutions of PbSnTe was carried out. The contribution of phonon scattering on substitution atoms to the effect of reducing thermal conductivity has been established. The composition of the PbSnTe solid solution, characterized by the lowest values of the lattice component of the thermal conductivity coefficient klat, was determined. The concentration of intrinsic charge carriers in solid solutions is calculated and their influence on the thermoelectric parameters of the material is shown.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135407274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-26DOI: 10.15330/pcss.24.3.520-529
V.E. Strel'nitskij, V.V. Vasylyev, V.B. Makarov, H.О. Lazarenko
The aim of this study is to investigate the wear resistance of diamond-like carbon (DLC) films and wear debris of polyethylene using pin-on-disc testing on two groups of CoCrMo discs with DLC coatings. DLC coatings deposited with use high productive vacuum-arc filtered plasma source in two regimes: with and without Ti interlayer on CoCrMo discs. The Orthopaedic Innovation Centre performed 2.5 million cycles (Mc) of POD testing on two groups of CoCrMo discs with DLC based on ASTM G99-17. The discs used were made of wrought low carbon alloy CoCrMo according to ASTM F1537. Wear performance of the PE pins against the DLC coated discs was determined and reported below. Lubricant samples were collected for each group after 0.5 and 2.5 Mc of testing, and used to characterize wear particles. All PE pins were assessed for damage features following 2.5 Mc of wear testing. The damage features identified included burnishing, scratching and grooving. The new process of DLC coating deposition from filtered vacuum arc plasma flows allows obtaining the stable DLC coating on the CoCrMo substrate. Thus, considering the low friction coefficient and the stable behavior of DLC such coating would be highly perspective for CoCrMo artificial joint implants.
{"title":"Diamond-like carbon coatings pin-on-disk wear testing","authors":"V.E. Strel'nitskij, V.V. Vasylyev, V.B. Makarov, H.О. Lazarenko","doi":"10.15330/pcss.24.3.520-529","DOIUrl":"https://doi.org/10.15330/pcss.24.3.520-529","url":null,"abstract":"The aim of this study is to investigate the wear resistance of diamond-like carbon (DLC) films and wear debris of polyethylene using pin-on-disc testing on two groups of CoCrMo discs with DLC coatings. DLC coatings deposited with use high productive vacuum-arc filtered plasma source in two regimes: with and without Ti interlayer on CoCrMo discs. The Orthopaedic Innovation Centre performed 2.5 million cycles (Mc) of POD testing on two groups of CoCrMo discs with DLC based on ASTM G99-17. The discs used were made of wrought low carbon alloy CoCrMo according to ASTM F1537. Wear performance of the PE pins against the DLC coated discs was determined and reported below. Lubricant samples were collected for each group after 0.5 and 2.5 Mc of testing, and used to characterize wear particles. All PE pins were assessed for damage features following 2.5 Mc of wear testing. The damage features identified included burnishing, scratching and grooving. The new process of DLC coating deposition from filtered vacuum arc plasma flows allows obtaining the stable DLC coating on the CoCrMo substrate. Thus, considering the low friction coefficient and the stable behavior of DLC such coating would be highly perspective for CoCrMo artificial joint implants.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134885968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Studies of temperature dependence of magnetoresistance for PdxBi2Se3 whiskers in the temperature range 1.6-77K in magnetic field up to 10 T were carried out. Crystals were grown by chemical transport reaction method in closed bromide system. The source and crystallization zone temperatures were 1100 K and 780 K, respectively. Doping of the crystals was carried out during the growth process with palladium impurity to concentrations of (1 – 2) × 1019 cm−3. In the low-temperature region beginning at a temperature of 5 K and reaching a temperature 3.5 K, a sharp decrease in resistance was observed, which is associated with the transition to superconducting state. Based on the analysis of the temperature dependence of the resistance at fixed magnetic fields, the Curie temperature Tc1=5.3 K and Tc2=3.5 K as well as the upper critical magnetic field Bc2=1.45 T and 0.25 T were determined. The established parameters indicates in II type supercondor. This is indicated by the ratio Δ0/kBTc = 2.0, which exceeds BCS limit of 1.76 and indicates a relatively large value of the superconducting gap Δ0=0.8 meV. The determined ratio A/γ2, which establishes the relationship between the electron-electron and electron-phonon interaction, is about of 2ao, which indicates a strong fermionic interaction with phonons in the PdxBi2Se3 superconductor. The estimated value of the ratio of the Curie temperature to the effective Fermi temperature equal to 0.04 also falls within the range of 0.01 ⩽ Tc/TF ⩽ 0.1, which confirms the unconventional superconductivity in the investigated whiskers.
{"title":"Unconventional superconductivity in PdxBi2Se3 whiskers","authors":"A.A. Druzhinin, I.P. Ostrovskii, Yu.M. Khoverko, M.P. Mykytiuk","doi":"10.15330/pcss.24.3.558-563","DOIUrl":"https://doi.org/10.15330/pcss.24.3.558-563","url":null,"abstract":"Studies of temperature dependence of magnetoresistance for PdxBi2Se3 whiskers in the temperature range 1.6-77K in magnetic field up to 10 T were carried out. Crystals were grown by chemical transport reaction method in closed bromide system. The source and crystallization zone temperatures were 1100 K and 780 K, respectively. Doping of the crystals was carried out during the growth process with palladium impurity to concentrations of (1 – 2) × 1019 cm−3. In the low-temperature region beginning at a temperature of 5 K and reaching a temperature 3.5 K, a sharp decrease in resistance was observed, which is associated with the transition to superconducting state. Based on the analysis of the temperature dependence of the resistance at fixed magnetic fields, the Curie temperature Tc1=5.3 K and Tc2=3.5 K as well as the upper critical magnetic field Bc2=1.45 T and 0.25 T were determined. The established parameters indicates in II type supercondor. This is indicated by the ratio Δ0/kBTc = 2.0, which exceeds BCS limit of 1.76 and indicates a relatively large value of the superconducting gap Δ0=0.8 meV. The determined ratio A/γ2, which establishes the relationship between the electron-electron and electron-phonon interaction, is about of 2ao, which indicates a strong fermionic interaction with phonons in the PdxBi2Se3 superconductor. The estimated value of the ratio of the Curie temperature to the effective Fermi temperature equal to 0.04 also falls within the range of 0.01 ⩽ Tc/TF ⩽ 0.1, which confirms the unconventional superconductivity in the investigated whiskers.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134885223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-26DOI: 10.15330/pcss.24.3.542-548
U.O. Kutliev, M.U. Otabaev, M.K. Karimov, F.K. Masharipov, I. Woiciechowski
Scattering of Ne+ ions at small angles of incidence from a stepped InGaP(001) <110> surface by the E0=5 keV was simulated using computer simulation. The trajectories of dechanneled ions from defect surface, as well as their energies at the scattering and scattering angle, are studied. It is shown that before dechanneling, the frequency and amplitude of the trajectory of ions, which move the surface channel formed by the stepped atom, increase. The energy distributions of these ions are obtained and the part of the spectrum corresponding to these ions is determined. It has been established that the energetic dechanneled ions formed low intensity peaks on the low-energy part of the spectrum.
{"title":"Scattering of low-energy Ne+ ions from the stepped surface of InGaP(001)<110> at the small angles of incidence","authors":"U.O. Kutliev, M.U. Otabaev, M.K. Karimov, F.K. Masharipov, I. Woiciechowski","doi":"10.15330/pcss.24.3.542-548","DOIUrl":"https://doi.org/10.15330/pcss.24.3.542-548","url":null,"abstract":"Scattering of Ne+ ions at small angles of incidence from a stepped InGaP(001) <110> surface by the E0=5 keV was simulated using computer simulation. The trajectories of dechanneled ions from defect surface, as well as their energies at the scattering and scattering angle, are studied. It is shown that before dechanneling, the frequency and amplitude of the trajectory of ions, which move the surface channel formed by the stepped atom, increase. The energy distributions of these ions are obtained and the part of the spectrum corresponding to these ions is determined. It has been established that the energetic dechanneled ions formed low intensity peaks on the low-energy part of the spectrum.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134885606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-26DOI: 10.15330/pcss.24.3.549-557
P. Srivastav, A.K. Prajapati, P.K. Yadawa
Zirconium (Zr), a metal with an hcp structure, has been investigated for the transmission of acoustic wave in the 0 to 25 GPa operating pressure. For this, the Lennard-Jones interaction potential approach has been used to estimate the higher order elastic coefficients (SOECs and TOECs). This model is used to calculate the 2nd and 3rd order elastic parameters for zirconium metal. With the help of SOECs, other elastic moduli such as bulk modulus (B), Young’s modulus (Y) and shear modulus (G) have been calculated for Zr metal using Voigt-Reuss-Hill (VRH) approximations. Later, applying SOECs as well as zirconium density under the same pressure range, three orientation dependent acoustic velocities, comprising Debye average velocities, have been studied. Basic thermal characteristics such as specific heat at constant volume, thermal conductivity associated with lattice, thermal energy density, thermal relaxation time as well as acoustic coupling coefficients of zirconium metal have been also calculated at same pressure range. The computation is also satisfactory in estimating the ultrasonic attenuation coefficients, arises due to the interaction of phonons, hardness as well as melting temperature under various pressures in this research work.
{"title":"Theoretical Investigation on Thermal, Mechanical and Ultrasonic Properties of Zirconium Metal with Pressure","authors":"P. Srivastav, A.K. Prajapati, P.K. Yadawa","doi":"10.15330/pcss.24.3.549-557","DOIUrl":"https://doi.org/10.15330/pcss.24.3.549-557","url":null,"abstract":"Zirconium (Zr), a metal with an hcp structure, has been investigated for the transmission of acoustic wave in the 0 to 25 GPa operating pressure. For this, the Lennard-Jones interaction potential approach has been used to estimate the higher order elastic coefficients (SOECs and TOECs). This model is used to calculate the 2nd and 3rd order elastic parameters for zirconium metal. With the help of SOECs, other elastic moduli such as bulk modulus (B), Young’s modulus (Y) and shear modulus (G) have been calculated for Zr metal using Voigt-Reuss-Hill (VRH) approximations. Later, applying SOECs as well as zirconium density under the same pressure range, three orientation dependent acoustic velocities, comprising Debye average velocities, have been studied. Basic thermal characteristics such as specific heat at constant volume, thermal conductivity associated with lattice, thermal energy density, thermal relaxation time as well as acoustic coupling coefficients of zirconium metal have been also calculated at same pressure range. The computation is also satisfactory in estimating the ultrasonic attenuation coefficients, arises due to the interaction of phonons, hardness as well as melting temperature under various pressures in this research work.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134885222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-26DOI: 10.15330/pcss.24.3.536-541
B.B. Kolupaev, B.S. Kolupaev, V.V. Levchuk
The results of the study on the relationship between the physical, mechanical and thermal properties of linear flexible polymers due to the harmonic and anharmonic components of the interatomic and intermolecular interaction force are presented. Using the example of polyvinyl chloride (PVC), polyvinyl butyral (PVB), polystyrene (PS), it is shown that in the region of 300 K < = T < = 400 K, the relaxation state of the system is realized due to the mobility of the structural elements, which makes it possible to apply the terms of thermodynamics and statistics of small systems to the properties of the material, and to treat the polymeric state as a special form of condensation of matter. The quantitative relationship between the properties of systems has been established, which is of interest for creating scientific foundations for predicting, obtaining and operating materials under the action of external fields of various nature.
本文介绍了原子间和分子间相互作用力的调和和非调和分量对线性柔性聚合物的物理、机械和热性能的影响。以聚氯乙烯(PVC)、聚乙烯醇丁醛(PVB)、聚苯乙烯(PS)为例，结果表明:在300 K <范围内;= T <= 400 K时，由于结构元素的迁移性，系统的松弛状态得以实现，这使得可以将小系统的热力学和统计学术语应用于材料的性质，并将聚合物状态视为物质的一种特殊形式的凝聚。建立了系统性质之间的定量关系，为在各种性质的外场作用下预测、获取和操作材料奠定了科学基础。
{"title":"Relationship between physical, mechanical and thermal properties of flexible chain polymers","authors":"B.B. Kolupaev, B.S. Kolupaev, V.V. Levchuk","doi":"10.15330/pcss.24.3.536-541","DOIUrl":"https://doi.org/10.15330/pcss.24.3.536-541","url":null,"abstract":"The results of the study on the relationship between the physical, mechanical and thermal properties of linear flexible polymers due to the harmonic and anharmonic components of the interatomic and intermolecular interaction force are presented. Using the example of polyvinyl chloride (PVC), polyvinyl butyral (PVB), polystyrene (PS), it is shown that in the region of 300 K < = T < = 400 K, the relaxation state of the system is realized due to the mobility of the structural elements, which makes it possible to apply the terms of thermodynamics and statistics of small systems to the properties of the material, and to treat the polymeric state as a special form of condensation of matter. The quantitative relationship between the properties of systems has been established, which is of interest for creating scientific foundations for predicting, obtaining and operating materials under the action of external fields of various nature.","PeriodicalId":20137,"journal":{"name":"Physics and Chemistry of Solid State","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134885827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：