Microscopic Phase-Field Study of the Occupancy Probability of α Sublattices Involving Coordination Environmental Difference for D022-Ni3V

被引：0
|
作者：
Zhang Jing [1 ]
Chen Zheng [1 ]
Zhuang Hou-Chuan [1 ]
Lu Yan-Li [1 ]
机构：
[1] NW Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2012年 / 29卷 / 02期
基金：
中国国家自然科学基金;
关键词：
COMPUTER-SIMULATION; SPINODAL DECOMPOSITION; TERNARY-SYSTEMS; SOLID-SOLUTION; STABILITY; PRECIPITATION; NI3(AL; V); EVOLUTION; NI3AL; FCC;
D O I：
10.1088/0256-307X/29/2/026103
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The nickel sites of a D0(22)-Ni3V phase are subdivided into Ni1 and Ni2 sublattices according to their coordination sphere difference. The occupancy probability (OP) differences influenced by the coordination sphere are interpreted using the microscopic phase field model. The OP of regular atoms (Ni-Ni1, Ni-Ni2), antisite defects (V-Ni1, V-Ni2), and substitutional defects (Al-Ni2, Al-Ni1) have strong site preferences, as well as temperature-dependence features, on both sublattices. These features involve both redistribution of components, and phase transition from D0(22) to L1(2).
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页数：4
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