王锟,王永欣,胡石,陈铮,程岩峰.B2-FeAl 有序相中成分与温度对占位与反位缺陷的影响: 相场法研究[J].稀有金属材料与工程,2019,48(7):2112~2117.[Kun Wang,Yongxin Wang,Shi Hu,Zheng Chen,Yanfeng Cheng.The Effects of Composition and Temperature on Site Occupancies and Antisite Defects in B2-FeAl Ordered Phase: A Phase Field Study[J].Rare Metal Materials and Engineering,2019,48(7):2112~2117.]
B2-FeAl 有序相中成分与温度对占位与反位缺陷的影响: 相场法研究
投稿时间:2018-01-24  修订日期:2018-05-17
中文关键词:  B2-FeAl  占位  反位缺陷  温度与成分  相场
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      原子占位与反位缺陷对金属间化合物合金的物理与机械性能产生巨大的影响。B2-FeAl作为一种具有优异性能的材料,研究其中的原子占位与反位缺陷具有十分重要的意义。本文利用相场方法研究了B2-FeAl有序相中铝浓度与温度对原子占位与反位缺陷变化趋势的影响。研究结果表明,铝浓度的增加或者温度的降低能够加速母相中的溶质原子分离,进而使得铝原子占位、铁原子占位以及反位铁或铝更早达到平衡态。特别地,铝浓度的升高或温度的降低能够增强铝和铁的占位,并减少两种类型的反位缺陷。此外,研究结果还表明铝浓度或者温度的变化不能改变B2-FeAl有序向中主要的反位缺陷类型。
The Effects of Composition and Temperature on Site Occupancies and Antisite Defects in B2-FeAl Ordered Phase: A Phase Field Study
英文关键词:B2-FeAl  site occupancy  antisite defect  temperature and composition  phase field
英文摘要:
      The site occupancies and antisite defects play important role in the physical and mechanical properties of intermetallic compound alloys. In this paper, the effects of Al concentration (cAl) and temperature (T) on the change trend of site occupancies and antisite defects in B2-FeAl, which has attractive properties, are investigated by phase field method. The numerical results show that the increase of cAl or the decrease of T can result in an acceleration of solute atoms segregation in matrix phase, and make site occupancies of Al and Fe as well as antisite Fe/Al reach equilibrium state earlier. Meanwhile, the increase of cAl or the decrease of T can enhance the site occupancies of Fe and Al and reduce the two types of antisite defects. Furthermore, the theoretical results show that the change of cAl and T is not able to change the main type of antisite defect in B2-FeAl ordered phase.
作者单位E-mail
王锟 西北工业大学凝固技术国家重点实验室 wangkun11811@163.com 
王永欣 Civil Aviation Safety Engi-neering Institute,Civil Aviation Flight University of China wyx818@126.com 
胡石 西北工业大学凝固技术国家重点实验室  
陈铮 西北工业大学凝固技术国家重点实验室  
程岩峰 西北工业大学凝固技术国家重点实验室  
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