Materials Science and Engineering最新文献_第7页

Preparation and magnetic properties of CoGd amorphous alloy films by the electroplating method 电镀法制备CoGd非晶合金薄膜及其磁性能

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90302-3

Norimiki Usuzaka, Hiroyuki Yamaguchi, Tohru Watanabe

引用次数: 18

Comparison of amorphous and liquid alloys by photoelectron spectroscopy 非晶合金与液态合金的光电子能谱比较

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90334-5

G. Indlekofer, A. Pflugi, P. Oelhafen, H.-J. Güntherodt, P. Häussler, H.-G. Boyen, F. Baumann

{"title":"Comparison of amorphous and liquid alloys by photoelectron spectroscopy","authors":"G. Indlekofer, A. Pflugi, P. Oelhafen, H.-J. Güntherodt, P. Häussler, H.-G. Boyen, F. Baumann","doi":"10.1016/0025-5416(88)90334-5","DOIUrl":"10.1016/0025-5416(88)90334-5","url":null,"abstract":"<div>Photoemission data of liquid AuSn alloys are presented and compared with corresponding measurements on amorphous vapour-quenched films. A fairly close general similarity between the valence bands of the two phases is observed. This result supports earlier studies of the atomic structure of the amorphous films which have been interpreted in terms of a liquid-like structure with a strong tendency to compound formation within the nearest-neighbour arrangements. Distinct deviations of spectra measured on the liquid samples compared with the amorphous phase have been observed; the Au 5d band is shifted to lower binding energies and no density-of-states minimum is observed at EF. The Au d band exhibits a continuous temperature-dependent shift in the liquid state which has been observed for the first time and which can be extrapolated to −193 °C in the amorphous phase. The origin of this temperature effect is discussed in terms of changes in the electron density and structural alterations in the short-range order at the gold site.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":"99 1","pages":"Pages 257-260"},"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)90334-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85564833","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: 16

Magnetic stability of water-quenched cobalt-based amorphous alloy 水淬钴基非晶合金的磁稳定性

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90305-9

Han Zhenghe , Wang Xinlin, Ke Cheng

引用次数: 1

Low temperature calorimetric and magnetic properties of Al-Mn and Al-Mn-Si quasi-crystals Al-Mn和Al-Mn- si准晶体的低温量热和磁性能

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90373-4

J.C. Lasjaunias, C. Paulsen, M. Godinho, C. Berger, D. Pavuna

{"title":"Low temperature calorimetric and magnetic properties of Al-Mn and Al-Mn-Si quasi-crystals","authors":"J.C. Lasjaunias, C. Paulsen, M. Godinho, C. Berger, D. Pavuna","doi":"10.1016/0025-5416(88)90373-4","DOIUrl":"10.1016/0025-5416(88)90373-4","url":null,"abstract":"<div>We report on the low temperature specific heat Cp and magnetic measurements for the following Al-Mn alloys: solid solution Al-3at.%Mn, Al86Mn14 and Al75Mn20Si5 in quasi-crystalline phases. From the amplitude of the electronic specific heat determined below 0.3 K, we propose, in agreement with the electrical resistivity values, that the large density of states in the quasi-crystalline phases are due to virtual bound states related to a regime of isolated manganese “impurities”. Both Cp and magnetic measurements indicate a rapid evolution of the magnetic interactions from Al86Mn14 to Al75Mn20Si5. In the latter, the ξac data together with the nuclear magnetic hyperfine specific heat confirm a spin glass state similar to that of canonical spin glasses such as Cu-Mn and Au-Mn. We emphasize that a small fraction of Mn s atoms are magnetic sites (probably less than 10%) in both quasi-crystalline phases.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":"99 1","pages":"Pages 439-442"},"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)90373-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81897148","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: 2

Local structure and stability of amorphous CuFeZr alloys 非晶CuFeZr合金的局部结构与稳定性

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90341-2

M. Taniwaki, E. Hatta, M. Maeda

{"title":"Local structure and stability of amorphous CuFeZr alloys","authors":"M. Taniwaki, E. Hatta, M. Maeda","doi":"10.1016/0025-5416(88)90341-2","DOIUrl":"10.1016/0025-5416(88)90341-2","url":null,"abstract":"<div>The local structure and stability of amorphous Cu60 − xFexZr40 were investigated by Mössbauer effect and differential scanning calorimetry measurements. The isomer shift decreased with increasing iron concentration for x < 5 and increased for x > 5. The activation energy of crystallization was 5.5–5.8 eV for x < 5 and decreased abruptly with increasing x for x > 5. These results show that copper atoms around an iron atom are substituted by iron atoms for x < 5 and that zirconium atoms around an iron atom are also substituted by iron atoms for x > 5. From the comparison of Mössbauer spectrum parameters for amorphous Cu59Fe1Zr40 and crystallized Cu59Fe1Zr40, it was shown that the average local structure of amorphous Cu59Fe1Zr40 is similar to that of crystallized Cu59Fe1Zr40 but that the former is more asymmetric than the latter. It was suggested that the asymmetry in local structure and the interatomic spacing are concerned with the stability of amorphous structure.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":"99 1","pages":"Pages 285-288"},"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)90341-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90393885","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: 7

Magnetic hardening in melt-spun FeRB alloys 熔融纺铁RB合金的磁硬化

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90309-6

C.J. Yang, R. Ray, R.C. O'Handley

引用次数: 4

Rare-Earth-Iron-Boron permanent magnets by rapid solidification processing 稀土-铁-硼永磁体的快速凝固加工

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90280-7

J.J. Croat

{"title":"Rare-Earth-Iron-Boron permanent magnets by rapid solidification processing","authors":"J.J. Croat","doi":"10.1016/0025-5416(88)90280-7","DOIUrl":"https://doi.org/10.1016/0025-5416(88)90280-7","url":null,"abstract":"<div>The development of a light-rare-earth-iron-based permanent magnet has been a long standing goal of the permanent magnet industry. The first successful attempts at magnetically hardening these materials employed rapid solidification techniques. This work culminated in the discovery of the NdFeB-based permanent magnet materials, the properties of which have been shown to derive from the Nd2Fe14B intermetallic phase. This class of magnets has received considerable scientific and commercial interest stemming from the fact that energy products already significantly exceed those of the SmCo-based materials. Moreover, owing to the relative abundance of neodymium, the cost of these materials is potentially much lower.Processing these magnets is carried out by two distinctly different techniques. These include the conventional powder metal-sinter process and consolidation of rapidly solidified materials. This paper discusses the preparation of these materials by the latter method. Included are the properties of the rapidly solidified ribbons themselves, methods for consolidating these materials into monolithic magnet shapes, microstructural data, and long-term thermal aging characteristics.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":"99 1","pages":"Page 11"},"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)90280-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91633648","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: 0

The impact of amorphous metals on the field of soft magnetic materials 非晶金属对软磁材料磁场的影响

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90279-0

Hans Warlimont

引用次数: 24

Magnetic properties of cobalt-rich amorphous alloys for saturable cores 饱和磁芯用富钴非晶合金的磁性能

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90300-X

Kiyotaka Yamauchi, Yoshihito Yoshizawa, Shin Nakajima

引用次数: 7

Stability of quasicrystalline phases in AlFeV alloys AlFeV合金准晶相的稳定性

Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90366-7

D.J. Skinner, V.R.V. Ramanan, M.S. Zedalis, N.J. Kim

引用次数: 21