Comparative study on glassy phase stabilities of Zr-Co-Al and Zr-Ni-Al metallic glasses
Comparative study on glassy phase stabilities of Zr-Co-Al and Zr-Ni-Al metallic glasses
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DOI：
10.2320/matertrans.46.2785
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发表时间：
2005-12
影响因子：
1.2
通讯作者：
M. Hasegawa;T. Taketomi;H. Kato;T. Takeuchi;U. Mizutani;A. Inoue
中科院分区：
文献类型：
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作者：
M. Hasegawa;T. Taketomi;H. Kato;T. Takeuchi;U. Mizutani;A. Inoue
采用热分析方法研究了zr - co - al和Zr-Ni-Al金属玻璃的相稳定性，并进行了比较。发现前者的最大ΔT x、T g /T l和y参数均大于后者，说明前者比后者具有更高的玻璃相稳定性。结果表明，前者的最佳组成是贫锆富铝，两者的过渡金属组成基本相同。由于Co和Ni具有几乎相同的原子半径和对Zr的混合焓，这是与玻璃相稳定性相关的因素，这种成分差异可能归因于另一个因素，即它们在费米能级周围不同的电子结构所导致的电子贡献的差异。
The phase stabilities ofZr-Co-Al and Zr-Ni-Al metallic glasses have been investigated by the thermal analysis and compared with each other. It is found that the largest ΔT x , T g /T l and y parameters of the former are larger than those of the latter, indicating that the former have higher glassy phase stability than the latter. It is also found that the optimum compositions of the former are Zr-poorer and Al-richer than those of the latter and that their transition metal compositions are almost the same. Since Co and Ni have almost the same atomic radius and mixing enthalpy against Zr which are factors correlated with the glassy phase stability, this composition difference may be attributable to another factor, i.e. their difference of the electronic contribution due to the different electronic structure around the Fermi level.