Crystallization Behavior of Amorphous Al-Y-Nd-Ni Alloy

Su Yong  Wu Wei  Chen Yiqing

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Crystallization Behavior of Amorphous Al-Y-Nd-Ni Alloy
Issue 1, Pages: 24-25(2004)
Published： 2004 ，
DOI：

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[1]苏勇,吴炜,陈翌庆,张红,高瑞平.非晶Al-Y-Nd-Ni合金的晶化行为[J].特种铸造及有色合金,2004(01):24-25+86.

Su Yong Wu Wei Chen Yiqing. Crystallization Behavior of Amorphous Al-Y-Nd-Ni Alloy. [J]. Special Casting & Nonferrous Alloys (1):24-25(2004)
[1]苏勇,吴炜,陈翌庆,张红,高瑞平.非晶Al-Y-Nd-Ni合金的晶化行为[J].特种铸造及有色合金,2004(01):24-25+86. DOI：

Su Yong Wu Wei Chen Yiqing. Crystallization Behavior of Amorphous Al-Y-Nd-Ni Alloy. [J]. Special Casting & Nonferrous Alloys (1):24-25(2004) DOI：

摘要

采用单辊旋淬快速凝固方法制备出Al85Y4Nd4Ni7的薄带合金

对快速凝固合金进行DSC分析和X射线衍射分析并测试了合金显微维氏硬度。结果表明 :在激冷态时

合金组织为非晶与过饱和α Al共存 ;在 3 10℃退火时

非晶转变为nm级Al晶

同时出现了三元亚稳相AlNiY与AlNdNi;在 3 40℃和 40 0℃退火后

亚稳相并没有完全消失

只是部分地转变为二元平衡相Al3 Ni和Al3 Nd。材料的硬度值在 3 10℃和 3 40℃退火后几乎一样

都比激冷态明显提高

然而在 40 0℃退火后

材料的硬度值却急剧下降

这是由于晶粒长大造成的。

Abstract

The ribbon of Al 85 Y 4Nd 4Ni 7 amorphous alloy was prepared by rapid solidification in melt-spinning. The alloy obtained was analyzed by means of DSC and X-ray diffractometry （XRD） as well as the micro-hardness measurement （Hv）. The results showed that the amorphous crystal and supersaturated α-Al phase coexisted in the chilled alloy. The amorphous crystal transformed into nano-Al crystal and ternary metastable AlNiY and AlNdNi during annealing at 310 ℃. The metastable phases partially transformed into binary equilibrium phases Al 3Ni and Al 3Nd duringr annealing at 340 ℃ and 400 ℃. The micro-hardness values of the alloy were almost the same during annealing at 310 ℃ and 340 ℃

which were much higher than that of the alloy in chilled state

while decreased dramatically during annealing at 400 ℃

owing to the growth of the crystal.