摘要
利用等温和变温晶化退火的方法对铜模吸铸La62Al15.7(Cu,Ni)22.3块体非晶合金的晶化行为进行了研究。结果表明,La62Al15.7(Cu,Ni)22.3块体非晶合金晶化过程分为3级,不同阶段的晶化产物分别为La、Al3La和富Cu、Ni的未知相;非晶合金的驰豫激活能和3级晶化激活能的关系为:Eg<Ep1<Ep2<Ep3。La62Al15.7(Cu,Ni)22.3块体非晶合金断裂强度随晶化相的析出急剧下降。
The crystallization behaviors of Cu-mold suction-cast La62Al15.7（Cu,Ni）22.3 bulk amorphous alloy were studied by isothermal and non-isothermal crystallization annealing method. The results show that the crystallization process of the amorphous alloys includes three stages; the products for the different stages are La, Al3La and Cu-and-Ni rich unknown phases, respectively. The activation energies Eg, Ep1, Ep2 and Ep3, corresponding to characteristic temperatures Tg, Tp1, Tp2 and Tp3, respectively, were obtained from the Kissinger and Ozawa equations. The relation of activation energies has the sequence of Es〈Ep1〈EpE〈Ep3. The fracture strength of the La62Al15.7（Cu,Ni）22.3 bulk amorphous alloy decreases significantly as the crystallization phase is precipitated
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2009年第10期1722-1726,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50671013)
北京市自然科学基金(2042014)
关键词
镧基非晶合金
动力学
晶化
La-based amorphous alloy
kinetics
crystallization
