Segregation of impurity to the grain boundary and interphase boundary in ultra-fine microstructure
超细显微组织中杂质向晶界和相间偏析
基本信息
- 批准号:07455271
- 负责人:
- 金额:$ 4.8万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:1995
- 资助国家:日本
- 起止时间:1995 至 1996
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Theoretical and experimental study of the effect of grain size on the grain boundary segregation was made and the results obtained are as follows ;1.The equilibrium segregation of solute to the grain boundary can be described by the modified Mclean's equation :2.The grain size effect on the intergranular segregation is remarkable with higher segregation energies and lower bulk concentrations with decreasing temperature.3.When the segregation free energy of X is larger than that of Y in A-X-Y ternary alloy, the grain boundary concentration of X atom decreases with decreasing grain size, while that of Y atom depends on the bulk concentrations of solute.4.An experimental evidence of the grain size dependence of the intergranular segregation in Cu-0.0015at.%Bi alloy was obtained.5.The segregation energy of Bi in Cu was estimated to be about 62.5kJ/mol.6.It is suggested that the grain size has a significant role on the grain boundary segregation not only in the metallic system but also in ceramics.
对晶粒尺寸对晶界偏析的影响进行了理论和实验研究,得到的结果如下:溶质向晶界的平衡偏析可以用修正的麦克林方程来描述:晶粒尺寸对晶间偏析的影响显著,随着温度的降低,偏析能增大,体积浓度降低。在A-X-Y三元合金中,当X的偏析自由能大于Y的偏析自由能时,X原子的晶界浓度随晶粒尺寸的减小而减小,而Y原子的晶界浓度则取决于溶质的体积浓度。Cu-0.0015at中晶间偏析与晶粒尺寸相关的实验证据。得到了%Bi合金。Bi在Cu中的偏析能约为62.5kJ/mol。结果表明,晶粒尺寸不仅对金属体系的晶界偏析有重要影响,对陶瓷体系的晶界偏析也有重要影响。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
K.Ishida: "How the grain size affects the grain boundary segregation?" Current state on High Strength Steels, The Iron and Steel Institute. 87-92 (1995)
K.Ishida:“晶粒尺寸如何影响晶界偏析?”
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
K.Ishida: "Effect of Grain Size on Grain Boundary Segregation" J.Alloy & Compounds. (印刷中). (1996)
K.Ishida:“晶粒尺寸对晶界偏析的影响”J.Alloy &compounds(出版中)。
- DOI:
- 发表时间:
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- 影响因子:0
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K.Ishida: "Effect of grain size on grain boundary segregation" Journal of Alloys and Compounds. 235. 244-249 (1996)
K.Ishida:“晶粒尺寸对晶界偏析的影响”合金与化合物杂志。
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- 影响因子:0
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ISHIDA Kiyohito其他文献
ISHIDA Kiyohito的其他文献
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$ 4.8万 - 项目类别:
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