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微觀相場法研究高鋁Ni75AlxV25-x中Ni3Al反位缺陷
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國家自然科學基金(50671084，50875217)；西北工業(yè)大學博士論文創(chuàng)新基金(CX200806)；中國博士后科學基金(20070420218)和陜西省自然科學基金項目資助


Microscopic Phase-Field Study of Antisite Defect of Ni3Al in High Al Concentration Ni75AlxV25-xAlloy
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    摘要:

    采用微觀相場法研究高Al濃度Ni75AlxV25-x合金析出相Ni3Al的反位缺陷隨Al濃度增高的變化規(guī)律。選取在1150 K溫度下時效從8 at%Al至20 at%Al的共14個合金作為研究對象。研究結果顯示：此類型合金主要反位缺陷類型是VAl 、NiAl；隨Al濃度增高，反位缺陷AlNi增高；而NiAl、VAl、VNi 3種反位缺陷變化與Al濃度和Ni3V析出與否相關，Al濃度稍低時，有Ni3V相析出，Al濃度增高反位缺陷NiAl降低，VNi升高，VAl沒變化；Al濃度稍高時，無Ni3V相析出，Al

    Abstract:

    The microscopic phase-field method was employed to study the antisite defect of Ni3Al which precipitated from high Al concentration Ni75AlxV25-x alloy. Result shows that the main antisite defect type of this alloy are VAl, NiAl; with the increasing of Al concentration, 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, when there is Ni3V phase, NiAl decrease with elevated Al concentration, while VNi increase and VAl keeps unconverted; at comparatively higher Al concentration, when there is no Ni3V phase precipitated from the matrix, NiAl slightly decreases with elevated Al concentration while VNi and VAl decrease sharply

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張 靜,陳 錚,張利鵬,來慶波,徐 聰.微觀相場法研究高鋁Ni75AlxV25-x中Ni3Al反位缺陷[J].稀有金屬材料與工程,2009,38(3):416~420.[Zhang Jing, Chen Zheng, Zhang Lipeng, Lai Qingbo, 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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  • 收稿日期:2008-03-09
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