Physics of the Solid State最新文献

{"title":"Strengthening Mechanisms and Features of Strain Stages in High-Manganese Austenitic Hadfield Steel","authors":"N. A. Popova,&nbsp;A. A. Klopotov,&nbsp;E. L. Nikonenko,&nbsp;L. I. Trishkina,&nbsp;T. V. Cherkasova,&nbsp;G. G. Volokitin,&nbsp;O. M. Loskutov,&nbsp;V. I. Borodin,&nbsp;A. I. Potekaev","doi":"10.1134/S1063783422110099","DOIUrl":"10.1134/S1063783422110099","url":null,"abstract":"<p>The paper presents the study of the deformation effect on high-manganese austenitic Hadfield steel. The dependences of the flow stress and the strain-hardening coefficient on the degree of plastic deformation in uniaxial tension revealed that the linear stage II of strain-hardening at ε ~ 5% can be divided into two substages different in the type of dislocation substructures and values of strain-hardening coefficients. The change in the strain-hardening coefficient correlates with the time when the twinning processes are switched on and the beginning of the transition of the dislocation substructure from one type to another. The following quantitative parameters were determined: the volume fraction of the material caught up by slip and twinning; the volume fractions of the material where twinning develops in one, two, and three systems. Twinning develops most intensively in the range of ε = 5–20%. The involvement of various types of defects (microtwins and dislocations) in the process of deformation does not depend on the method of plastic deformation (tension, rolling). The role of crystallographic texture, which manifests itself in an increase in the Schmid factor during the formation of microtwins, is determined, since microtwinning entails orientational softening and facilitates the sliding process. The presence of minimal and even zero values of the Schmid fa-ctor during twinning was revealed in individual grains. In these grains, the driving force of twinning is the internal stress fields, the occurrence of which is due to the incompatibility of the deformation of neighboring grains.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4094929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of Domain Wall Dynamics in GdFeCo Using Double High-Speed Photography","authors":"K. H. Prabhakara,&nbsp;T. B. Shapaeva,&nbsp;V. V. Yurlov,&nbsp;K. A. Zvezdin,&nbsp;A. K. Zvezdin,&nbsp;C. S. Davies,&nbsp;A. Tsukamoto,&nbsp;A. I. Kirilyuk,&nbsp;Th. Rasing,&nbsp;A. V. Kimel","doi":"10.1134/S1063783422110105","DOIUrl":"10.1134/S1063783422110105","url":null,"abstract":"<p>It is shown using the technique of double high-speed photography that an external magnetic field triggers the motion of a GdFeCo domain wall with a velocity up to 1.2 km/s. The domain wall velocity increases and levels off with an increase in the amplitude of the driving magnetic-field pulse. In contrast to the earlier experiments on iron ferrites, no influence of femtosecond laser pulses on the domain wall dynamics has been observed, even when the pump pulse energy is sufficient for magnetization reversal.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4095462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of the Thickness on the Resistivity of Thin Diamond-like Carbon Coatings on Silicon Substrate","authors":"I. A. Zur,&nbsp;Y. E. Shmanai,&nbsp;Yu. A. Fedotova,&nbsp;A. A. Kharchenko,&nbsp;S. A. Movchan","doi":"10.1134/S1063783422110166","DOIUrl":"10.1134/S1063783422110166","url":null,"abstract":"<p>The relationship between <i>sp</i>²/<i>sp</i>³ hybridizations ratio of atomic bonds in diamond-like carbon (DLC) and its electrical resistivity for coatings with a thickness in the range 22–70 nm prepared by vacuum arc deposition on silicon substrate of the SHB-8 brand has been established. It is established, that an increase in the coating thickness from 22 to 70 nm is accompanied by a decrease in the specific transverse electrical resistance of samples from 17 to 2 GΩ m. This effect is explained by an increase in the proportion of carbon atoms with <i>sp</i>² hybridization of electronic orbitals from 86 to 91%, which leads to the appearance of an additional number of π-bonds. A mathematical model describing the spatial distribution of current when measuring the transverse <i>I–V</i> characteristic, has been developed. The results obtained will be useful in creating resistive layers on the electrodes of gas-discharge detectors of charged particle to limit the amount of c-urrent in the event of rare spark discharges inside them caused by the registration of random highly ionizing pa-rticles.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4094962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the Mechanisms of Compression Hardening of Rail Steel","authors":"N. A. Popova,&nbsp;V. E. Gromov,&nbsp;Yu. F. Ivanov,&nbsp;M. A. Porfir’ev,&nbsp;A. A. Yur’ev,&nbsp;Yu. A. Shlyarova","doi":"10.1134/S1063783422110087","DOIUrl":"10.1134/S1063783422110087","url":null,"abstract":"<p>Methods of modern physical materials science are used to study the evolution of structural-phase states and dislocation substructure of rail steel under uniaxial compression deformation up to 50%. The revealed fragmentation of pearlite grains becomes more expressed with increasing deformation, and the fragmentation of cementite plates with the fragment size of 15–20 nm weakly depends on the degree of deformation. The change in the scalar and excess dislocation density with increasing deformation is analyzed. Sources of internal stress fields are identified and classified. The data obtained formed the basis for a quantitative analysis of the mechanisms of hardening of rail steel at degrees of compression deformation of 15, 30, and 50%. The contributions to strengthening caused by friction of the matrix lattice, dislocation substructure, fragment boundaries, carbide particles, internal stress fields, solid-solution strengthening, and the pearlite component of the steel structure are estimated. The primary mechanism of metal hardening at the deformation of 50% is hardening by incoherent particles and elastic internal stress fields. Using the additivity principle, which assumes the independent action of each of the hardening mechanisms, the dependence of the total yield strength of rail steel on the degree of compressive deformation is estimated.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4095748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diffusion of Phosphorus and Gallium from a Deposited Layer of Gallium Phosphide into Silicon","authors":"N. F. Zikrillaev,&nbsp;S. V. Koveshnikov,&nbsp;Kh. S. Turekeev,&nbsp;N. Norkulov,&nbsp;S. A. Tachilin","doi":"10.1134/S1063783422110154","DOIUrl":"10.1134/S1063783422110154","url":null,"abstract":"<p>Diffusion from a layer of gallium phosphide GaP deposited onto a silicon surface is studied. After diffusion, the silicon samples are examined using the Van der Pauw method and a scanning electron microscopy in order to determine the concentration distribution of impurity atoms of phosphorus and gallium.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4094938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diffusion and Stress Interrelation in the Transition Zone between a Particle and a Matrix in Composite Synthesis","authors":"A. G. Knyazeva,&nbsp;M. A. Anisimova","doi":"10.1134/S1063783422110063","DOIUrl":"10.1134/S1063783422110063","url":null,"abstract":"<p>A model of interaction between a solid particle and a metal melt is presented. This model takes into account some possible mechanisms of stress occurrence in the transient zone, formed between the particle and the matrix during the composite synthesis. It is assumed in the examples that either only one new phase or only two new phases appear between the initial particle of the refractory component and the melt. The mechanical stresses accompanying diffusion and growth of the new phase result from the solution of equilibrium problems. Approximate analytical solutions of the coupled problems are given, including for the case where the explicit dependence of the diffusion coefficient on the stress is taken into account.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4095475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temperature Dependence of the Lattice Thermal Conductivity of Metastable Phases of FCC Ti and Zr","authors":"E. B. Dolgusheva","doi":"10.1134/S1063783422100018","DOIUrl":"10.1134/S1063783422100018","url":null,"abstract":"<p>The metastable phases of a material have other, possibly anomalous properties as compared to its stable structural state. The elastic and dynamic properties of metastable phases with a face-centered cubic (FCC) lattice of highly anharmonic transition metals, Ti and Zr, calculated previously by the molecular dynamics method with many-body potentials, constructed using the embedded-atom method, are in good agreement with previous theoretical calculations. The possibility of using the non-equilibrium molecular dynamics method to calculate the lattice thermal conductivity of metastable FCC structures in both metals is demonstrated. Temperature dependences of the lattice thermal conductivity coefficients of FCC Ti and Zr are obtained for crystallites with a cross section of 12 × 12 FCC unit cells (u.c.) and lengths of 48 and 96 u.c. The results are compared with the previously calculated lattice thermal conductivity of Al, which is consistent with ab initio calculations.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4416191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methods for Calculating the Lattice Thermal Conductivity of Metals at High and Low Temperatures","authors":"E. I. Salamatov,&nbsp;E. B. Dolgusheva","doi":"10.1134/S1063783422090074","DOIUrl":"10.1134/S1063783422090074","url":null,"abstract":"<p>The molecular dynamics (MD) method seems to be the most promising method for determining the lattice contribution to the overall thermal conductivity of metals and metal alloys. In this study, the MD method with a proven potential is used for studying the lattice thermal conductivity of aluminum at high and low temperatures. It is shown that standard algorithms are more convenient for calculating the lattice thermal conductivity coefficient at high temperatures. In this case, the thermal conductivity coefficient is calculated using the Fourier equation, and the MD calculations are used to simulate a steady nonequilibrium state with a linear temperature gradient at a length comparable to the size of the calculated cell. This approach gives the values of the lattice thermal conductivity coefficient, which are in good agreement with the results of the first principles calculations. The thermal conductivity coefficient decreases with a decrease in the size of the base crystallite because of the depletion of the low frequency section of the phonon spectrum, the contribution of which to thermal conductivity becomes insignificant with an increase in the temperature. At high temperatures, the thermal conductivity coefficient does not depend on the crystallite size and agrees with the value obtained from the first principles calculations. To calculate the thermal conductivity at low temperatures, a new method based on the homogeneous heat equation for an infinite line is proposed. In this case, the MD method is used to obtain a steady state nonequilibrium temperature distribution in the system in the form of a Gaussian curve that corresponds to the fundamental solution of the equation. The approximation of system relaxation from the nonequilibrium state to the equilibrium one makes it possible to determine the thermal diffusivity coefficient related to the thermal conductivity coefficient. The test calculations performed for a thin aluminum film at low temperatures with different initial conditions show that the obtained thermal diffusivity coefficient does not depend on the parameters of the initial Gaussian distribution, which suggests the applicability of the proposed method for studying the lattice thermal conductivity.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4718224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formation and Stability of the Crystalline Structures in Two-Mode Phase-Field Crystal Model","authors":"V. E. Ankudinov","doi":"10.1134/S1063783422090013","DOIUrl":"10.1134/S1063783422090013","url":null,"abstract":"<p>The two-mode phase-field crystal (PFC) model is an extended classical PFC model which allows one to describe hexagonal and other complex lattices. In such model the order parameter is periodic in crystalline state and constant in disordered or liquid phase. The PFC model allows linking mesoscopic and microscopic spatial–temporal scales and to implement in the results of the molecular dynamics method into phase-field models. In present work the regimes of crystallization of two-dimensional structures using the two-mode PFC method was studied. A quasi-crystalline anisotropic striped phase was found, this phase qualitatively corresponds to the obtained ones in colloidal solutions. The stability of structures during phase transitions between crystals with various symmetries was investigated. A structure diagram was constructed, and the melting curve was presented. A numerical approach for the two-mode PFC model was developed and the simulations were carried out using finite-element method in direct space. The dependence of the types of crystalline structures on the control parameters was investigated. It is shown that the scale parameters <i>q</i>₀, <i>q</i>₁ allow one to control the lattice symmetry type, and the shift parameters <i>r</i>₀, <i>r</i>₁ affect on the position of the structures existence regions and the melting curve. Also the shift parameters allow one to control the formation of the quasi-crystalline structures. The stability of structures with hexagonal and quadratic symmetries was investigated. During such transitions the change in near- and far-order symmetry occurs sequentially. The possible existence of a crystal with 5-fold symmetry as an intermediate phase was figured out. The sequence of transitions from triangular through honeycomb and square lattice to the liquid phase is shown. It is shown that the transitions themselves occur through the mixed glassy phase. Proposed model and method is applicable for modeling of the transitions between three-dimensional hexagonal (HCP) and cubic (FCC/BCC) lattices in metals and alloys.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4720789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum to: Effect of External Factors on Magnetism of Fluctuating Low-Dimensional Electron and Spin Correlations in Frustrated Manganites La1 – ySmyMnO3 + δ (y = 0.85, 1.0)","authors":"F. N. Bukhanko,&nbsp;A. F. Bukhanko","doi":"10.1134/S1063783422090128","DOIUrl":"10.1134/S1063783422090128","url":null,"abstract":"","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4718697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}