摘要
采用三元微观相场动力学模型,研究了Ni75Al14Mo11合金的沉淀过程及其γ'相的原子占位现象,对合金的微观组织演化图像、序参数及占位几率进行了分析,结果表明,Mo与Al元素的加入使该合金中首先析出L10结构,随后发生L10结构向L12结构的原位结构转变;γ'相沉淀析出方式是等成分有序化兼失稳分解机制;γ'有序相中Al、Mo原子共同占据了面心立方的顶角位,且Al原子在γ'有序相中顶角β2位的占位几率始终稍大于Mo原子。
The precipitation process and the atomic site occupation of γ＇ phase in Ni75 Al14 M011 alloy were investigated by the microscopic phase-field kinetic model, the microscopic morphology evolution, order parameter and occupation probability were analyzed. The results show that L10 phase first precipitates and then transforms into L12 phase in the NiTsAll4MOll alloy due to the addition of Mo and A1. The γ＇ phase precipitation is congruent ordering and spinodal decomposition. A1 and Mo atoms occupy the corner site of γ＇ phase together, and the occupation probability of A1 atoms are more than that of Mo atoms.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第2期193-198,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51204147)
科技部国际科技合作项目(2011DFA50520)
山西省回国留学人员科研项目(2011-重点6)
教育部博士点新教师基金(20101420120005)
关键词
NI
A1
.Mo
.合金
微观相场
7’相沉淀
原子占位
Ni75 Al14 Mou alloy
microscopic phase-field
γ＇ phase precipitation
atomic site occupation
