Glass formation and microstructure evolution in Al–Ni–RE (RE = La, Ce, Pr, Nd and misch metal) ternary systems
Glass formation and microstructure evolution in Al–Ni–RE (RE = La, Ce, Pr, Nd and misch metal) ternary systems
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DOI：
10.1080/14786430701537961
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发表时间：
2007-08
影响因子：
1.6
通讯作者：
H. Yang;J. Wang;Y. Li
中科院分区：
文献类型：
--
作者：
H. Yang;J. Wang;Y. Li
本文系统地研究了熔融纺丝富铝Al-Ni-RE （RE = La, Ce, Pr， Nd和Mm； Mm =杂散金属）合金的玻璃形成。最佳的非晶形成区同样位于Al85Ni10RE5周围和α-Al、Al11RE3和Al3Ni复合材料的中心。在这些Al-Ni-RE体系中，组分完全非晶的临界截面和最佳成分的相似之处是根据它们的竞争晶相和热力学性质来解释的。有趣的是，在最佳的玻璃形成合金中，Ni含量明显高于RE含量，这可能与Ni- al原子对之间的强相互作用以及Ni中心团簇造成的致密堆积有关。
Glass formation has been systematically studied in melt-spun Al-rich Al–Ni–RE (RE = La, Ce, Pr, Nd and Mm; Mm = misch metal) alloys by navigating the compositions following the observation of microstructure evolution in the resulting ribbons. The optimum glass-forming regions are similarly located around Al85Ni10RE5 and found in the centre of the composites with primary phase α-Al, Al11RE3 and Al3Ni. The similarities in the critical cross-section below which a component is fully amorphous and the optimum compositions in these Al–Ni–RE systems are interpreted in terms of their competing crystalline phases and thermodynamic properties. Interestingly, it is indicated that Ni content is markedly higher than RE content in the best glass-forming alloys, which may be associated with strong interaction between Ni–Al atom pairs and the dense packing due to Ni-centred clusters.