Philosophical Magazine Letters最新文献_第8页

Texture evolution in platinum: the role of non-octahedral slip 铂的织构演化：非八面体滑移的作用

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-09-02 DOI: 10.1080/09500839.2021.1946187

R. Kalsar, R. Madhavan, S. Suwas

引用次数: 1

Magnetocaloric properties of Ni50Mn28Ga22 melt-spun ribbons Ni50Mn28Ga22熔喷薄带的磁热性能

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-08-11 DOI: 10.1080/09500839.2021.1962015

D. K. Satapathy, I. Al-Omari, S. Aich

{"title":"Magnetocaloric properties of Ni50Mn28Ga22 melt-spun ribbons","authors":"D. K. Satapathy, I. Al-Omari, S. Aich","doi":"10.1080/09500839.2021.1962015","DOIUrl":"https://doi.org/10.1080/09500839.2021.1962015","url":null,"abstract":"ABSTRACT\u0000 NiMnGa-based Heusler alloys are known for their shape-memory effect. However, in this study, the focus will be on the magneto-thermal (magnetocaloric) properties of rapidly solidified Ni50Mn28Ga22 ribbons melt spun at 1300 and 1600 RPM as well as annealed bulk specimens. The ribbons, both as-spun and annealed, and the annealed bulk specimens were tested in a SQUID to determine the magnetic properties at a field of 50 kOe with a temperature step of 3 K in the temperature range 355–385 K. The magnetic data from the isotherms were used to achieve Arrott plots. Second-order transitions were observed in the materials at the TC temperature. The values of magnetic entropy ΔSm were calculated from the magnetic data and these were further used to calculate the values of refrigeration capacity RC. The highest RC value of 273 J/kg was obtained for 1300NMG5 800 where 1300, 800 and 5, represent the melt spinning rate in RPM, the annealing temperature in Celsius and the duration of annealing in hours, respectively. The values of ΔSm were similar for all the ribbons. To confirm the order of the magnetic transition, universal curves were plotted which led to the conclusion that the transformation at the Curie temperature is a second-order ferromagnetic to paramagnetic transition.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":"102 1","pages":"1 - 14"},"PeriodicalIF":1.2,"publicationDate":"2021-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42296566","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}

引用次数: 1

In-situ SAXS study on fractal of Jincheng anthracite during high-temperature carbonisation 高温炭化过程中晋城无烟煤分形的原位SAXS研究

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-08-03 DOI: 10.1080/09500839.2021.1936259

Yuexiang Wang, Zhihong Li, Jiao Kong, L. Chang, Dongfeng Li, Baoliang Lv

引用次数: 7

Hypercooling limit and physical properties of liquid MoNbReTaW refractory high-entropy alloy 液态MoNbReTaW耐火高熵合金的过冷极限及物理性能

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-08-03 DOI: 10.1080/09500839.2021.1933642

L. Hu, M. Lin, B. Wei

{"title":"Hypercooling limit and physical properties of liquid MoNbReTaW refractory high-entropy alloy","authors":"L. Hu, M. Lin, B. Wei","doi":"10.1080/09500839.2021.1933642","DOIUrl":"https://doi.org/10.1080/09500839.2021.1933642","url":null,"abstract":"ABSTRACT The thermophysical properties of refractory MoNbReTaW high-entropy alloy in both supercooled liquid and high-temperature solid states were explored by an electrostatic levitation technique. The maximum supercooling attains 504 K, and the hypercooling limit is derived as 571 K. The liquid density at liquidus temperature is measured to be 13.3 g cm−3, which increases linearly with decreasing temperature at a slope of 6.83 × 10−4 g cm−3 K−1. The liquid alloy exhibits 5.3% relative volume shrinkage during crystallization. The thermal expansion coefficient of liquid and solid alloy at liquidus temperature are determined as 5.0 × 10−5 K−1 and 3.6 ×10−5 K−1, respectively. The liquid specific heat at liquidus temperature is found to be 38.2 J mol−1 K−1, and basically displays a linear decreasing tendency with temperature. According to the calculated enthalpy of fusion 24.7 kJ mol−1 and measured specific heats, the temperature-dependent entropy and Gibbs free energy difference between supercooled liquid and crystalline solid are obtained.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":"101 1","pages":"312 - 319"},"PeriodicalIF":1.2,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09500839.2021.1933642","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43931040","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}

引用次数: 3

Effects of CeO2, Si and Co on the microstructure and properties of Ni–Cu composite coating on 6061 aluminium alloy by laser cladding CeO2、Si和Co对6061铝合金激光熔覆Ni-Cu复合镀层组织和性能的影响

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-08-03 DOI: 10.1080/09500839.2021.1933235

Pengfei Zhang, Yuxin Li

引用次数: 3

Preparation of flake-shaped Fe-based nanocrystalline soft magnetic alloy particles subjected to plastic deformation 片状铁基纳米晶软磁合金塑性变形颗粒的制备

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-07-19 DOI: 10.1080/09500839.2021.1953713

S. Motozuka, H. Sato, H. Kuwata, Mitsuo Bito, Y. Okazaki

{"title":"Preparation of flake-shaped Fe-based nanocrystalline soft magnetic alloy particles subjected to plastic deformation","authors":"S. Motozuka, H. Sato, H. Kuwata, Mitsuo Bito, Y. Okazaki","doi":"10.1080/09500839.2021.1953713","DOIUrl":"https://doi.org/10.1080/09500839.2021.1953713","url":null,"abstract":"ABSTRACT Fe-based nanocrystalline alloy powder prepared by ball-milling is a potential candidate as a soft magnetic composite (SMC). Since the magnetic properties of particles having a random geometry arising from brittle fracture deteriorate by the presence of a demagnetising field, plastically deformed flake-shaped powders, exhibiting better magnetic properties on account of the suppression of any demagnetising field, are desirable. Microstructure such as grain size, lattice distortion and the distribution of dislocations, are affected by ball-milling treatment which changes the magnetic properties. In this study, Fe-based nanocrystalline alloy sheets are ball-milled with lubricant oil as a process control agent (PCA) and the microstructure of the particles investigated. The PCA effectively suppresses the brittle fracture of the alloy sheet during the ball-milling treatment and plastically deformed flake-shaped particles are then successfully obtained. Transmission electron microscopy reveals that there were few lattice defects in the α-Fe grain of the alloy, which indicated that almost only grain-boundary-mediated processes such as GB diffusion/sliding/migration and grain rotation dominate the deformation mechanism. However, Williamson–Hall analysis based on synchrotron radiation exhibits a slope indicating micro-strain in the α-Fe grains. It is found that the plastic deformation induced by the ball-milling treatment forms a microstructure having lattice distortion but containing few lattice defects. It is considered that a slight growth of the existing grains, which can be induced by thermal treatment, can achieve a strain- and dislocation-free microstructure, which is desirable for soft magnetic alloys.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":"101 1","pages":"399 - 407"},"PeriodicalIF":1.2,"publicationDate":"2021-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09500839.2021.1953713","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47501680","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}

引用次数: 4

Reorientation of a titanium–vacancy complex in a vanadium alloy 钒合金中钛-空位配合物的重新取向

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-07-14 DOI: 10.1080/09500839.2021.1950933

Xiao-Tong Li, Xiaozhi Tang, Ya-Fang Guo

引用次数: 0

Dislocation imaging through mapping based on the combination of an electron energy-loss spectroscope with a scanning transmission electron microscope 基于电子能量损失光谱仪和扫描透射电子显微镜组合的映射位错成像

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-07-14 DOI: 10.1080/09500839.2021.1949066

Susumu Yamada

引用次数: 0

Concentration-gradient-driven anisotropic spinodal decomposition kinetics: nitriding of metallic alloys 浓度梯度驱动的各向异性旋多分解动力学:金属合金的氮化

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-07-06 DOI: 10.1080/09500839.2021.1948130

K. Sasidhar, M. Gururajan, S. Meka

{"title":"Concentration-gradient-driven anisotropic spinodal decomposition kinetics: nitriding of metallic alloys","authors":"K. Sasidhar, M. Gururajan, S. Meka","doi":"10.1080/09500839.2021.1948130","DOIUrl":"https://doi.org/10.1080/09500839.2021.1948130","url":null,"abstract":"ABSTRACT The effect of crystallographically oriented, unidirectional concentration gradients on spinodal decomposition in cubic crystalline solids with elastic and interfacial energy anisotropy is discussed. Phase-field simulations reveal that the kinetics of spinodal decomposition occurring in such systems is dependent on the degree of misorientation between the direction of composition gradient and the preferred crystallographic orientation for growth of spinodal fluctuations; the larger is the misorientation, the slower the kinetics. This phenomenon has been used to explain the well-known grain-orientation-dependent N-uptake kinetics observed during nitriding of metallic alloys. Several plausible causes have been proposed in the literature for the grain-orientation-dependent N-uptake kinetics during nitriding. However, this study reveals that this phenomenon is observed exclusively and without exception in alloy systems having a spinodal instability. The N-uptake kinetics in such systems is known to be dependent on the kinetics of spinodal decomposition. Consequently, anisotropic spinodal decomposition kinetics occurring owing to the presence of a surface-directed N-composition gradient in poly-crystalline metals has been shown to be a more fundamental cause for the phenomenon.","PeriodicalId":19860,"journal":{"name":"Philosophical Magazine Letters","volume":"101 1","pages":"432 - 443"},"PeriodicalIF":1.2,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09500839.2021.1948130","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45436988","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}

引用次数: 0

Magnetic properties and magnetic phase transition in square-octagon lattice: Monte Carlo study 方八边形晶格的磁性能和磁相变：蒙特卡罗研究

IF 1.2 4区材料科学

Philosophical Magazine Letters Pub Date : 2021-07-03 DOI: 10.1080/09500839.2021.1922775

A. Jabar, R. Masrour, M. Hamedoun, A. Benyoussef, A. Hourmatallah, N. Benzakour, A. Rezzouk, K. Bouslykhane, J. Kharbach

引用次数: 1