| 微观相场法研究高铝Ni75AlxV25-x中Ni3Al反位缺陷 |
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| 引用本文： | 张 静,陈 铮,张利鹏,来庆波,徐 聪. 微观相场法研究高铝Ni75AlxV25-x中Ni3Al反位缺陷[J]. 稀有金属材料与工程, 2009, 38(3): 416-420 |
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| 作者姓名： | 张 静 陈 铮 张利鹏 来庆波 徐 聪 |
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| 作者单位： | 西北工业大学,陕西,西安,710072 |
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| 基金项目： | 国家自然科学基金，西北工业大学博士学位论文创新基金，中国博士后科学基金，陕西省自然科学基金 |
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| 摘 要： | 采用微观相场法研究高Al浓度Ni75Akv25-x合金析出相Ni3Al的反位缺陷随Al浓度增高的变化规律.选取在1150 K温度下时效从8 at%Al至20 at%Al的共14个合金作为研究对象.研究结果显示:此类型合金主要反位缺陷类型是VAl、NiAl;随Al浓度增高,反位缺陷AlNi增高:而Ni Al、VAl、VNi 3种反位缺陷变化与Al浓度和Ni3V析出与否相关,Al浓度稍低时,有Ni3v相析出,Al浓度增高反位缺陷Ni Al降低,VHi升高,VAl没变化;Al浓度稍高时,无Ni3V相析出,Al浓度增高反位缺陷NiAl稍有降低,VNi、VAl明显降低.
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| 关 键 词： | 反位缺陷 LI2结构Ni3Al 微观相场 |
| 收稿时间： | 2008-03-09 |
Microscopic Phase-Field Study of Antisite Defect of Ni3Al in High Al Concentration Ni75AlxV25-xAlloy |
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| Zhang Jing,Chen Zheng,Zhang Lipeng,Lai Qingbo and Xu Cong. Microscopic Phase-Field Study of Antisite Defect of Ni3Al in High Al Concentration Ni75AlxV25-xAlloy[J]. Rare Metal Materials and Engineering, 2009, 38(3): 416-420 |
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| Authors: | Zhang Jing Chen Zheng Zhang Lipeng Lai Qingbo Xu Cong |
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| Abstract: | The microscopic phase-field method was employed to study the antisite defect of Ni3Al which precipitated from high Al con-centration Ni75AlxV25-x alloy. Result shows that the main antisite defect type of this alloy are VAl, NiAl; with the increasing of Al concentra-tion, the AlNi antisite defect also increases; while changes of the other three types antisite defect NiAl, VAl, and VNi are slightly complex for its dependence on the precipitation or not of Ni3V phase; at comparatively lower Al concentration, w... |
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| Keywords: | antisite defect L12 structure Ni3Al microscopic phase-field method |
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