Philosophical Magazine最新文献

{"title":"Gas in external fields: the weird case of the logarithmic trap","authors":"Loris Ferrari","doi":"10.1080/14786435.2023.2285368","DOIUrl":"https://doi.org/10.1080/14786435.2023.2285368","url":null,"abstract":"The effects of an attractive logarithmic potential u(r)=u0ln⁡(r/r0) (u0>0 being the trap strength and r0 an arbitrary length scale) on a gas of N non interacting particles (Bosons or Fermions), in ...","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"52 11","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A hybrid dislocation deforming two welded anisotropic crystals","authors":"Nizar Lefi, Salem Neily, Roland Bonnet","doi":"10.1080/14786435.2023.2280367","DOIUrl":"https://doi.org/10.1080/14786435.2023.2280367","url":null,"abstract":"The elastic field of an angular dislocation line that has a branch placed in a crystal of a bi-material while the other branch is along a strongly bound or welded interface, is found when the two c...","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"34 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electronic, magnetic, half-Metallic, pressure-induced elastic and curie temperature predictions of Zr2RhTl Heusler alloy: DFT and EFT studies","authors":"Evren Görkem Özdemir, Semih Doğruer, Ziya Merdan","doi":"10.1080/14786435.2023.2285031","DOIUrl":"https://doi.org/10.1080/14786435.2023.2285031","url":null,"abstract":"The DFT method investigated the total and partial magnetic moments, half-metallic characters, and pressure-dependent elastic properties of Zr2RhTl alloy. According to the ground state properties, t...","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"43 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Whereabouts of missing atoms in a laser-injected Si (part IV): interaction of plasma Si with dislocations in a laser-injected Si","authors":"Hiroyasu Saka, Hiroyuki Iwata","doi":"10.1080/14786435.2023.2283115","DOIUrl":"https://doi.org/10.1080/14786435.2023.2283115","url":null,"abstract":"The interaction of dislocations with plasma Si in a laser-injected Si was studied comprehensively using a combination of in-situ and ex-situ heating experiments in 200 kV electron microscopes and i...","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"30 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An EBSD analysis of a commercial immiscible Cu43%Cr alloy after high-pressure torsion processing and annealing","authors":"I. Bibimoune, K. Abib, T. Baudin, F. Brisset, Y. Huang, D. Bradai, T. G. Langdon","doi":"10.1080/14786435.2023.2282023","DOIUrl":"https://doi.org/10.1080/14786435.2023.2282023","url":null,"abstract":"The influence of high-pressure torsion (HPT) and annealing on microstructure, texture and thermal stability of an immiscible composite Cu43%Cr alloy was studied using electron backscatter diffracti...","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"30 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ti-Al-based alloys with Mo: high-temperature phase equilibria and microstructures in the ternary system","authors":"Benedikt Distl, Frank Stein","doi":"10.1080/14786435.2023.2279575","DOIUrl":"https://doi.org/10.1080/14786435.2023.2279575","url":null,"abstract":"Molybdenum is one of the major alloying elements in TiAl-based alloys for high-temperature structural applications developed over the last decades. This is due to its stabilising effect on the (βTi) phase at high-temperatures, which crucially improves the hot-workability of such alloys. For further alloy development, an exact knowledge of the phase equilibria in the Ti–Al–Mo system is essential. However, there are still uncertainties and inconsistencies related to the ternary phase diagram. In this study, a series of ternary alloys was produced and heat-treated between 700 and 1300 °C. Composition, structure, and thermal stability of the phases were analysed and the resulting phase equilibria were established by applying a combination of scanning electron microscopy (SEM), electron probe microanalysis (EPMA), differential scanning calorimetry (DSC), and high-energy X-ray diffraction (HEXRD). From these results, a series of partial isothermal sections is obtained illustrating the phase equilibria in the Ti-rich part of the Ti–Al–Mo system.","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":" 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135291023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase transformation kinetics in a homogenised cast alloy 625 and its impact on deformation micromechanisms","authors":"Sonika Chahar, Ashwin Kumar Godasu, Arunansu Haldar, Suhrit Mula","doi":"10.1080/14786435.2023.2276693","DOIUrl":"https://doi.org/10.1080/14786435.2023.2276693","url":null,"abstract":"ABSTRACTThis study focuses on understanding the impact of sequential ageing on the microstructural evolution of a large-grained structure homogenised cast alloy 625 and its effect on mechanical properties. SEM and TEM analyses of aged samples were conducted to comprehend various precipitation micromechanisms such as (i) nucleation and growth kinetics of γ′′ phase and (ii) transformation of primary carbides and grain boundary phase(s) evolved. The MC-based primary carbides are ascertained to transform into M23C6 secondary carbides following two completely different pathways: (I) MC + γ→ M23C6 + δ (mainly at grain boundary) and (II) MC + γ→M23C6 + γ″ (mainly within matrix). Furthermore, all three variants of γ″ phase are detected to evolve in the matrix displaying a crystallographic orientation of [001]γ″ // < 001>γ, and {100}γ″ // {100}γ. The formation of γ″ phase gradually improves the hardness of the material up to 650 h (224 HV) of ageing with a corresponding average precipitate size of 61 nm. The growth of γ″ particles complies with the Lifshitz–Slyozov–Wagner (LSW) theory of diffusion-controlled precipitate coarsening during the entire ageing period. Surprisingly, the hardness declined significantly beyond 650 h of ageing, even though the γ″ phase remained coherent with the matrix despite its coarsening (106 nm after 1000 h of ageing) and evidence of γ″→δ (mainly incoherent) transformation is not detectible throughout the ageing treatment. This lowering of hardness is attributed to a non-conventional slip-to-twin transition in the deformation mode of coherent γ″ particles after prolonged ageing, which is confirmed through tensile deformation micromechanisms analysis of the 650 and 1000 h aged samples.KEYWORDS: Alloy 625ageing characteristicscoherent precipitategrain boundary carbidesneedle-like δ phaseelectron microscopy AcknowledgementThe authors highly acknowledge financial support by Science and Engineering Research Board, Government of India, through grant number. CRG/2019/000949 as well as the assistance of the material from MIDHANI LTD., Hyderabad, India. The authors are also thankful to the Metallurgical and Materials Engineering Department, IIT Roorkee, for the support of different experimental and characterization facilities.Disclosure statementNo potential conflict of interest was reported by the author(s).Credit authorship contribution statementSonika Chahar: Experimental, Conceptualisation, Methodology, Visualisation, Validation, Writing – original draft.Ashwin Kumar Godasu: Conceptualisation, Methodology, Visualisation.Arunansu Haldar: Draft review and editing.Suhrit Mula: Conceptualisation, Supervision, Validation, Review and editing.Data availabilityData will be available on request.Additional informationFundingThe authors highly acknowledge financial funding by Science and Engineering Research Board, Government of India, through grant number CRG/2019/000949 as well as the assistance of the material from MIDHANI LTD., Hyderabad","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":" 46","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135241630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on discontinuous precipitation behaviour and performance change of Cu–Ti–Ni during aging","authors":"Guangming Cao, Ruixiang Li, Zhanjie Gao, Chenggang Li, Hao Wang","doi":"10.1080/14786435.2023.2270489","DOIUrl":"https://doi.org/10.1080/14786435.2023.2270489","url":null,"abstract":"ABSTRACTThe discontinuous precipitation behaviour and properties of Cu–Ti–Ni alloy during aging precipitation were studied by means of electron backscatter diffraction (EBSD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The results show that β'-Cu4Ti was formed in the matrix during the aging process of Cu–4Ti–1Ni alloy, and the cellular structure grows at the grain boundary in the form of discontinuous precipitation in the middle and late stages of aging, and expands to the interior of the grains with the aging time until the grains were completely covered, then a uniform Cu3Ti structure was formed. In addition, the coverage area of cellular tissue increases with aging time and temperature. Under different aging temperature conditions, the hardness of the alloy increases first and then decreases with the aging time, with a peak value of 319.8 HV and a strength of 782.2 MPa. The electrical conductivity increases rapidly and then increases slowly with aging time, reaching 15.5 IACS after aging at 500°C for 10 h. Based on the Avrami equation, the kinetic analysis of discontinuous precipitation at different temperatures was established.KEYWORDS: Cu-Ti-Ni alloyaging strengtheningdiscontinuous precipitationperformance changes Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by Science and Technology Special Projects of Liaoning Province [grant number 2022JH25/10200001]; Postdoctoral Science Foundation of China [grant number 2022T150205]; National Key Research and Development Program of China [grant number 2022YFB3304800].","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135111314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamic property of one-dimensional hydrogenic impurity in Nitride semiconductor quantum well","authors":"Xue Liu, De-hua Wang, Xin-yu Xie, Bin-hua Chu, Shu-fang Zhang, Gang Zhao","doi":"10.1080/14786435.2023.2270436","DOIUrl":"https://doi.org/10.1080/14786435.2023.2270436","url":null,"abstract":"ABSTRACTThe thermodynamic properties of one-dimensional (1-D) hydrogenic impurity in Nitride semiconductor quantum well have been investigated. Firstly, using a combination of the linear variational approach and the effective mass approximation, we obtain the eigen-energy of hydrogenic impurity states in AlN, GaN and InN quantum wells. Subsequently, we explore the quantum size effect on the thermodynamic properties of these low-dimensional semiconductor structures, revealing some novel and intriguing phenomena. It is found as the width of the quantum well is increased, the energy of hydrogenic impurity gets decreased, however, the thermodynamic parameters, such as the average energy, entropy and heat capacity of the hydrogenic impurity become increased. The physical origins of these peculiar phenomena are attributed to the competitive mechanism between the quantum confinement effect and Coulombic interaction between the electron and impurity. Finally, by conducting a comprehensive comparison of the thermodynamic parameters among GaN, InN, and AlN quantum wells, we propose an innovative strategy for modulating the thermodynamic properties of these low-dimensional semiconductor structures. This manipulation can be achieved not only through external factors such as temperature and quantum well size, but also by altering internal variables like the effective mass and relative dielectric constant of the semiconductor material. This study not only advances our understanding of the thermodynamic properties of hydrogenic impurities in semiconductor quantum wells, but also provides some theoretical guidance for practical applications in fields such as semiconductor physics, condensed matter physics, chemical physics, etc.KEYWORDS: Thermodynamic propertyhydrogenic impuritysemiconductor quantum welllow-dimensional structure AcknowledgementWe also thank the referees for their valuable suggestions.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Natural Science Foundation of Shandong Province, China (Grant Nos.ZR2019MA066 and ZR2020MF103), the Taishan Scholar Project of Shandong Province (grant number tsqn201812098), and the National Natural Science Foundation of China (Grant Nos. 11874191 and 62275115).","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"65 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135111479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diffusion mechanism in liquid Al–Cu melt under high magnetic field","authors":"Wenhao Lin, Meilong Feng, Ying Liu, Hao Cai, Zhe Shen, Chunmei Liu, Tianxiang Zheng, Bangfei Zhou, Yunbo Zhong","doi":"10.1080/14786435.2023.2271427","DOIUrl":"https://doi.org/10.1080/14786435.2023.2271427","url":null,"abstract":"ABSTRACTHigh static magnetic field (HMF) is now a widely used technique to tailor materials. However, as one of the most fundamental properties in liquid alloy melts, atomic diffusion under HMF still lacks understanding. By using a novel gravity-assisted automatic docking device, the interdiffusion coefficient (IDC) in liquid Al–Cu alloy at various temperatures has been studied under HMF. It is found that HMF reduces the IDC. When HMF is larger than 5 T, the value of IDC remains constant at a certain temperature, which indicates HMF changes the diffusion mechanism from convective dominated mass transfer to a diffusive limited state in the liquid melt. For various temperatures, we find that a decrease of the frequency factor of atoms is the main reason for IDC decreasing under a certain HMF. The diffusion mechanism in liquid melt is similar to the vacancy mechanism in solids. This work provides a deep insight for atomic diffusion in a liquid melt by considering the interaction between temperature and HMF.KEYWORDS: Al–Cu alloyatomic diffusionhigh magnetic fieldactivation energyfrequency factor Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe authors gratefully acknowledge the financial support of the National Natural Science Foundation of China [U1732276], Natural Science Foundation of Shanghai [21ZR1424400], Open Project of State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University [SKLASS 2021-Z06], Changjiang Scholars Program of China, China Association for Science and Technology Young Talent Support Project.","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134973922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}