Journal of The Less Common Metals最新文献_第2页

M10S14O-type oxysulphides (M La, Ce, Pr, Nd, Sm) as an “oxygen trap” in oxidation reactions of reduced lanthanide chlorides with sulphur m10s14o型氧硫化物(M、La、Ce、Pr、Nd、Sm)在还原性镧系氯化物与硫氧化反应中的“氧阱”作用

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90017-X

T. Schleid, F. Lissner

引用次数: 55

Study of SiC-whisker-reinforced ZrO2 ceramics using the sol-gel method 溶胶-凝胶法制备sic晶须增强ZrO2陶瓷

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90005-O

G. Tu, Z. Sui, Changzhen Wang

引用次数: 4

Kinetic study of the hafnium-hydrogen reaction 铪-氢反应动力学研究

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90007-Q

Y Levitin, J Bloch, M.H Mintz

{"title":"Kinetic study of the hafnium-hydrogen reaction","authors":"Y Levitin, J Bloch, M.H Mintz","doi":"10.1016/0022-5088(91)90007-Q","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90007-Q","url":null,"abstract":"<div>The kinetics of hafnium hydride formation were studied utilizing conventional rate measurements (Sieverts system) combined with metallographic examinations of partially hydrided samples. The rate measurements were performed at 700 TorrH2 over a temperature range 200–550 °C. Two types of hafnium samples (polycrystalline and crystal bar) were compared. The progression of the massive stage of the reaction is characterized by a contracting-envelope morphology with a constant hydride front velocity. The anisotropy in the reaction front velocity regarding different crystalline orientations of the metal is small, resulting in similar results for the different types of hafnium. The temperature dependence of the front velocity obeys an Arrhenius-type relation over the temperature range 250–450 °C, with an apparent activation energy of 0.50 ± 0.05 eV. Considering a diffusion-controlled model, a diffusion activation barrier of about 0.4 eV is evaluated, which agrees with the average reported value for the diffusion of hydrogen in hafnium hydride. At temperatures above about 500 °C, deviations from the Arrhenius relation are displayed, possibly owing to a change of mechanism.</div>","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"175 2","pages":"Pages 219-234"},"PeriodicalIF":0.0,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-5088(91)90007-Q","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71754616","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}

引用次数: 9

Ferromagnetic materials: A handbook on the properties of magnetically ordered substances, vol. 5 铁磁材料:磁性有序物质性质手册，第5卷

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90024-X

Ch.J. Raub

引用次数: 8

SrHgO2: Ein oxomercurat mit delafossitstruktur 弓状x光片

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90015-V

M Soll, Hk Müller-Buschbaum

引用次数: 13

Thermodynamic studies of La(FexAl1−x)13 alloys La(FexAl1−x)13合金的热力学研究

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90012-S

Xiuguang Xu, Guangqiang Li, Hualong Yu, Changzhen Wang

引用次数: 5

On magnetic transitions in a novel compound, UPdGa 新型化合物UPdGa的磁跃迁

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90011-R

V. Tran, R. Troć

引用次数: 8

Synthesis and crystal structure of MTe2O6 (M≡Ce, Th) MTe2O6 (M≡Ce, Th)的合成与晶体结构

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90008-R

M. López, M. Veiga, A. Jerez, C. Pico

引用次数: 11

Influence of quenching rate and heat treatment on the magnetic properties and phase components of rapidly quenched Fe77.5Nd4B18.5 alloy 淬火速率和热处理对快速淬火Fe77.5Nd4B18.5合金磁性能和相成分的影响

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90004-N

Shen Bao-gen, Yang Lin-yuan, Zhang Jun-xian, Zhao Jian-gao

{"title":"Influence of quenching rate and heat treatment on the magnetic properties and phase components of rapidly quenched Fe77.5Nd4B18.5 alloy","authors":"Shen Bao-gen, Yang Lin-yuan, Zhang Jun-xian, Zhao Jian-gao","doi":"10.1016/0022-5088(91)90004-N","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90004-N","url":null,"abstract":"<div>The magnetic properties and phase components of rapidly quenched Fe77.5Nd4B18.5 alloy as a function of quenching rate and heat treatment were studied. X-ray diffraction and thermomagnetic measurements show that the Fe77.5Nd4B18.5 ingot consists of Nd2Fe14B, Fe2B and α-Fe. The X-ray diffraction patterns of optimally annealed samples show only metastable Fe3B phase which decomposes into Fe2B and α-Fe at Ta > 850 °C, but the thermomagnetic curves show the presence of the Nd2Fe14B phase. In the sample annealed at 950 °C for 60 min, Nd1.1Fe4B4 appears in coexistence with Nd2Fe14B, Fe2B and α-Fe. The Fe77.5Nd4B18.5 alloy is found to have very good glass-forming ability. Samples prepared at quenching rates vs ⩾ 6.6 m s−1 are amorphous and magnetically soft. Annealing at about 650–670 °C gives the highest coercive field, which is nearly independent of quenching rate.</div>","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"175 2","pages":"Pages 199-204"},"PeriodicalIF":0.0,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-5088(91)90004-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71754618","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}

引用次数: 4

Synthesis, structure and properties of a new intermetallic compound, Ca7Ni4Sn13 新型金属间化合物Ca7Ni4Sn13的合成、结构与性质

Journal of The Less Common Metals Pub Date : 1991-10-01 DOI: 10.1016/0022-5088(91)90020-5

Deborah A Vennos, Michael E Badding, F.J DiSalvo

引用次数: 6