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Designing aluminum-rich bulk metallic glasses via electronic-structure-guided microalloying
Wu, N. C.; Zuo, L.; Wang, J. Q.; Ma, E.; Wang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2016-04-15
发表期刊ACTA MATERIALIA
ISSN1359-6454
卷号108页码:143-151
摘要Aluminum-based bulk metallic glasses (BMGs) are notoriously difficult to make, owing to the relatively low glass forming ability (GFA) of Al-rich alloys. As a result, the search for Al-rich BMGs has resorted to adjusting the alloy composition through minor additions of alloying elements. But such a "microalloying" strategy faces yet another challenge well known to the BMG community: GFA often shows a strong composition dependence but the underlying reason remains poorly understood. Here we tackle these two problems using an electronic-structure-informed approach, in lieu of relying solely on trial and error. Co and La are introduced into the Al-Ni-Y base alloy to partially substitute for Ni and Y, respectively, and their effects on the Fermi level and Brillouin zone size are monitored using spectroscopy experiments. The Co and La contents are tailored to approach a favorable condition that minimizes the electronic density of states at the Fermi level, a recipe to elevate the stability of the amorphous phase. This approach guided us to land an optimal composition in the quinary alloy system, Al86Ni6.75-Co2.25Y3.25La1.75, where fully glassy rods reached a record size of 1.5 mm in diameter via copper mold casting. The electronic structure perspective thus appears to be a useful knob to turn to push the envelope of GFA accessible to Al-rich BMGs. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属[wu, n. c. ; wang, j. q.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [wu, n. c. ; zuo, l.] northeastern univ, coll mat & met, 3-11 wenhua rd, shenyang 110819, peoples r china ; [ma, e.] johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa
关键词Al Alloys Bulk Metallic Glasses Electronic Structure Glass-forming Ability Microalloying
学科领域Materials Science ; Metallurgy & Metallurgical Engineering
资助者National Natural Science Foundation of China [51131006, 51471166]; JHU [US-NSF-DMR-1505621]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75908
专题中国科学院金属研究所
通讯作者Wang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Wu, N. C.,Zuo, L.,Wang, J. Q.,et al. Designing aluminum-rich bulk metallic glasses via electronic-structure-guided microalloying[J]. ACTA MATERIALIA,2016,108:143-151.
APA Wu, N. C.,Zuo, L.,Wang, J. Q.,Ma, E.,&Wang, JQ .(2016).Designing aluminum-rich bulk metallic glasses via electronic-structure-guided microalloying.ACTA MATERIALIA,108,143-151.
MLA Wu, N. C.,et al."Designing aluminum-rich bulk metallic glasses via electronic-structure-guided microalloying".ACTA MATERIALIA 108(2016):143-151.
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