553 K）時結果相反。"/>

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噴射成形La62Al15.7(Cu,Ni)22.3塊體非晶合金的晶化行為
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國家自然科學基金（50671013）；北京市自然科學基金（2042014）


Crystallization Behavior of La62Al15.7(Cu,Ni)22.3 Bulk Amorphous Alloy Prepared by Spray Forming
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    摘要:

    研究了噴射成形和銅模吸鑄法制備的La62Al15.7(Cu,Ni)22.3塊體非晶合金的晶化行為。結果表明，兩種工藝制備的非晶合金晶化過程都為三級晶化，晶化的順序為：非晶→非晶＋La→非晶＋La＋Al3La→非晶＋La＋Al3La＋富Cu和Ni的未知相。結合晶化動力學計算和退火晶化實驗結果表明，低溫（<503 K）時，噴射成形La62Al15.7(Cu,Ni)22.3非晶合金的熱穩(wěn)定性優(yōu)于銅模吸鑄La62Al15.7(Cu,Ni)22.3非晶合金，高溫（>553 K）時結果相反。

    Abstract:

    The crystallization behavior of the spray-formed La62Al15.7(Cu,Ni)22.3 bulk amorphous alloys and the suction-cast alloys was studied. The results show that the crystallization processes of both the La62Al15.7(Cu,Ni)22.3 amorphous alloys include three stages. La, Al3La and an unknown phase containing much Cu and Ni are precipitated in the amorphous matrix, respectively. Calculating of the activation energy and annealing experimental results for the La62Al15.7(Cu,Ni)22.3 amorphous alloys show that the thermal stability of the spray-formed bulk La62Al15.7(Cu,Ni)22.3 amorphous alloy is better than that of the suction-cast amorphous alloy below 503 K, while above 553 K it is inverse.

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董亭義,楊 濱,何建平,張 勇,許存官.噴射成形La62Al15.7(Cu, Ni)22.3塊體非晶合金的晶化行為[J].稀有金屬材料與工程,2011,40(8):1417~1421.[Dong Tingyi, Yang Bin, He Jianping, Zhang Yong, Xu Cunguan. Crystallization Behavior of La62Al15.7(Cu, Ni)22.3 Bulk Amorphous Alloy Prepared by Spray Forming[J]. Rare Metal Materials and Engineering,2011,40(8):1417~1421.]
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  • 收稿日期:2010-08-27
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