Materials Science and Engineering最新文献_第9页

Electronic structure of quasi-crystalline AlMn in comparison with amorphous and crystalline alloys 准晶AlMn与非晶和结晶合金的电子结构比较

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90358-8

J.M. Frigerio, A. Meddour, A. Perez, M.G. Blanchin, J.P. Dupin, J. Rivory

引用次数: 6

Local icosahedral packing energetics for d-band metals d波段金属的局部二十面体填充能量学

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90355-2

Robert B. Phillips, A.E. Carlsson

{"title":"Local icosahedral packing energetics for d-band metals","authors":"Robert B. Phillips, A.E. Carlsson","doi":"10.1016/0025-5416(88)90355-2","DOIUrl":"10.1016/0025-5416(88)90355-2","url":null,"abstract":"<div>Local icosahedral order in solid environments is modelled by polytope {3, 3, 5} (a packing of atoms on S3, the surface of the unit sphere in four dimensions, with perfect icosahedral symmetry) and by a 147 atom extension of the Mackay icosahedron. The bonding energies of each are calculated in a one-electron d-band, tight binding model, as a function of d-band filling. The energies per site on the polytope, and on the central atom of the extended Mackay icosahedron, are then compared with those in the f.c.c. structure to reveal chemical trends in the relative stability of local icosahedral packing. The calculated structural energy differences show that even in fairly close-packed metals, local icosahedral packing is preferred only over a limited range of d-band fillings, roughly between 2 and 5 d-electrons per atom, even when frustration effects are artificially turned off by the use of the polytope. It is also observed that the magnitude of these energy differences is of the same order of magnitude as the structural energy differences between f.c.c. and b.c.c. structures and typically exceed the elastic energy differences which arise as a result of atomic size mismatches. These phase stability results are in marked contrast with those calculated in pair potential models.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":"99 1","pages":"Pages 349-352"},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90355-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76127014","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: 1

Electronic structure of (Ni33Zr67)1 − 1Xx (X ≡ Ti, V, Cr, Mn, Fe, Co, Ni or Cu) ternary metallic glasses studied by low temperature specific heat measurements 低温比热测量研究了(Ni33Zr67)1−1Xx (X≡Ti, V, Cr, Mn, Fe, Co, Ni或Cu)三元金属玻璃的电子结构

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90342-4

Y. Yamada, Y. Itoh, U. Mizutani

引用次数: 24

Professeur Jacques Durand 雅克·杜兰德教授

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90278-9

W.L. Johnson

引用次数: 0

Fast dissipative and diffusional relaxation of the magnetic permeability in ferromagnetic metallic glasses 铁磁金属玻璃磁导率的快速耗散和扩散弛豫

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90284-4

P. Allia , C. Beatrice , F. Vinai

引用次数: 2

Production and properties of melt-spun Fe-6.5wt.%Si ribbons 熔融纺铁-6.5wt的生产及性能。%如果丝带

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90295-9

Y. Sato, T. Sato, Y. Okazaki

引用次数: 27

Electronic structure and electron transport in CaMgCu metallic glasses CaMgCu金属玻璃的电子结构和电子输运

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90343-6

U. Mizutani, M. Sasaura, V.L. Moruzzi, T. Matsuda

引用次数: 8

New quasi-crystalline and amorphous phases in rapidly quenched AlGe(Cr, Mn) and AlSi(Cr, Mn) alloys with high metalloid concentrations 高类金属浓度的AlGe(Cr, Mn)和AlSi(Cr, Mn)快速淬火合金中出现新的准晶和非晶相

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90375-8

H.M. Kimura, A. Inoue, Y. Bizen, T. Masumoto, H.S. Chen

引用次数: 17

Magnetization of amorphous and crystalline CoSiB alloys 非晶和结晶CoSiB合金的磁化

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90296-0

T. Kulik, H. Matyja, B. Lisowski

{"title":"Magnetization of amorphous and crystalline CoSiB alloys","authors":"T. Kulik, H. Matyja, B. Lisowski","doi":"10.1016/0025-5416(88)90296-0","DOIUrl":"10.1016/0025-5416(88)90296-0","url":null,"abstract":"<div>Studies were made on the influence of composition on the Curie temperature and magnetization of CoSiB alloys in three states: (i) as-quenched (fully amorphous), (ii) after the first stage of crystallization and (iii) after complete crystallization. Two new ferromagnetic phases were obtained and characterized.It was found that increase in metalloid content in Co100 −x(Si0.5B0.5)x glasses. (x = 22–32 at.%) causes a decrease in the Curie temperature Tc and in the effective magnetic moment μ per cobalt atom. Glasses of intermediate metalloid content (25 ⩽ x ⩽ 30 at.%) crystallized polymorphously forming the metastable Co17n(Si0.5B0.5)7n ferromagnetic phase with <math><mtext>T</mtext><msub><mi></mi><mn><mtext>c</mtext></mn></msub><mtext> & 500 K</mtext></math> and magnetization at O K of M(o) = 6.33 × 10−8Wbmg−8 (for its amorphous counterpart Tc = 486 KandM(0) = 7.89 × 10−8Wbmg−1. For the second new phase Co2Si(B), appearing during the first stage of crystallization of metalloid-rich glasses (x > 30 at.%), the following values were obtained: Tc = 107 KandM(0) = 1.0 × 10−8Wbmg−1.It was found that for glasses containing up to 30 at.% metalloid the amorphous state is more favourable as far as the room-temperature magnetization is concerned.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":"99 1","pages":"Pages 77-80"},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90296-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90747254","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: 5

High pressure induced crystallization of rapidly solidified AlFe and AlMn quasi-crystalline alloys 快速凝固AlFe和AlMn准晶合金的高压诱导结晶

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90367-9

E.S.R. Gopal, S. Baranidharan, J.A. Sekhar

引用次数: 11