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Antisite defect types and temporal evolution characteristics of D022-Ni3V structure: Studied by the microscopic phase field

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Abstract

Microscopic phase field simulation is performed to study antisite defect type and temporal evolution characteristic of D022-Ni3V structure in Ni75Al x V25−x ternary system. The result demonstrates that two types of antisite defect VNi and NiV coexist in D022 structure; however, the amount of NiV is far greater than VNi; when precipitates transform from D022 singe phase to two phases mixture of D022 and L12 with enhanced Al:V ratio, the amount of VNi has no evident response to the secondary L12 phase, while NiV exhibits a definitely contrary variation tendency: NiV rises without L12 structure precipitating from matrix but declines with it; temporal evolution characteristic and temperature dependent antisite defect VNi, NiV are also studied in this paper: The concentrations of the both defects decline from high antistructure state to equilibrium level with elapsed time but rise with elevated temperature; the ternary alloying element aluminium atom occupies both α and β sublattices of D022 structure with a strong site preference of substituting α site.

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Authors and Affiliations

  1. School of Material Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Jing Zhang, Zheng Chen, MingYi Zhang, QingBo Lai, YanLi Lu & YongXin Wang

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  1. Jing Zhang
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  2. Zheng Chen
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  3. MingYi Zhang
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Correspondence to Jing Zhang.

Additional information

Supported by the National Natural Science Foundation of China (Grant Nos. 50671084 and 50875217), the Doctorate Foundation of Northwestern Polytechnical University of China (Grant No. CX200806), the China Postdoctoral Science Foundation Funded Project (Grant No. 20070420218), and the Natural Science Foundation of Shaanxi Province of China

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Zhang, J., Chen, Z., Zhang, M. et al. Antisite defect types and temporal evolution characteristics of D022-Ni3V structure: Studied by the microscopic phase field. Sci. China Ser. G-Phys. Mech. Astron. 52, 1154–1160 (2009). https://doi.org/10.1007/s11433-009-0156-4

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  • DOI: https://doi.org/10.1007/s11433-009-0156-4

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