ZrNbCuNiAl bulk metallic glass matrix composites containing dendritic bcc phase precipitates
ZrNbCuNiAl bulk metallic glass matrix composites containing dendritic bcc phase precipitates
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DOI：
10.1063/1.1467707
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发表时间：
2002-04-08
影响因子：
4
通讯作者：
Schultz, L
中科院分区：
文献类型：
--
作者：
K端hn, U;Eckert, J;Schultz, L
本文报道了一种多组分Zr66.4Nb6.4Cu10.5Ni8.7Al8非晶合金在铜模铸造过程中的相形成。一个bcc相嵌入在一个玻璃基质形式的模铸块体样品产生一个原位大块金属玻璃基质复合材料从熔体缓慢冷却后。在退火时，材料的第一放热转变与二十面体相从玻璃态基质中沉淀有关。含bcc相的金属玻璃复合材料的形成强烈地受合金组成和凝固过程中的实际冷却速率的支配。室温压缩试验表明，在破坏前有明显的屈服和塑性变形。(C)2002年美国物理学会。
We report on phase formation of a multicomponent Zr66.4Nb6.4Cu10.5Ni8.7Al8 glass-forming alloy upon copper mold casting. A bcc phase embedded in a glassy matrix forms for moldcast bulk samples yielding an in-situ bulk metallic glass matrix composite upon slow cooling from the melt. Upon annealing, the first exothermic transformation of the material is related to precipitation of an icosahedral phase from the glassy matrix. The formation of the bcc phase-containing metallic glass composite is strongly governed by the alloy composition and the actual cooling rate during solidification. Room-temperature compression tests reveal significant yielding and plastic deformation before failure. (C) 2002 American Institute of Physics.