The nickel sites of a D022-Ni3 V 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...The nickel sites of a D022-Ni3 V 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 (NiNi_(1),NiNi_(2)),antisite defects (VNi1,VNi2),and substitutional defects (AlNi_(2),AlNi_(1) ) 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).展开更多
基金Supported by the Basic Research Foundation of NWPU under Grant No GC201109the National Natural Science Foun-dation of China under Grant Nos 51075335 and 10902086the Natural Science Foundation of Shaanxi Province under Grant Nos SJ08-ZT05 and SJ08-B14.
文摘The nickel sites of a D022-Ni3 V 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 (NiNi_(1),NiNi_(2)),antisite defects (VNi1,VNi2),and substitutional defects (AlNi_(2),AlNi_(1) ) 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).
