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

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:
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    0
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  • 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:
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    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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ISHIDA Kiyohito其他文献

ISHIDA Kiyohito的其他文献

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{{ truncateString('ISHIDA Kiyohito', 18)}}的其他基金

Grain growth and pinning effect of microstructure dispersed by liquid particles
液体颗粒分散微观结构的晶粒生长与钉扎效应
  • 批准号:
    24246102
  • 财政年份:
    2012
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Preparation of Giant Pseudo-Single Crystals of Superelastic Alloys and the Mechanism of Grain Growth
超弹性合金巨型准单晶的制备及晶粒长大机制
  • 批准号:
    24656426
  • 财政年份:
    2012
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
New Functional Co-base Alloys-Phase stability and Its Industrial Applications
新型功能钴基合金-相稳定性及其工业应用
  • 批准号:
    19106012
  • 财政年份:
    2007
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
Development of new Invar-type alloys by controlling stress-induced transformation of thermoelastic martensite and its industrial application
控制热弹性马氏体应力诱导相变新型因瓦合金的开发及其工业应用
  • 批准号:
    14102030
  • 财政年份:
    2002
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
Development of Thermodynamic Model on Phase Diagram Database
相图数据库热力学模型的开发
  • 批准号:
    11694124
  • 财政年份:
    1999
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Dispersion of Fine Oxide and Sulfide in Steel Formed by Stable and Metastable Monotectic Reaction
稳定和亚稳偏晶反应形成的钢中细小氧化物和硫化物的弥散
  • 批准号:
    11450258
  • 财政年份:
    1999
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Development of New Type Cu Base Alloys Obtained by Controling Ordering and Phase Separation
控制有序和相分离的新型铜基合金的开发
  • 批准号:
    09355022
  • 财政年份:
    1997
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Thermodynamic Database for Alloy Semiconductor Systems.
合金半导体系统的热力学数据库。
  • 批准号:
    09044124
  • 财政年份:
    1997
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for international Scientific Research
Development of Computer-Assisted System for Microstructural Design and Control of Steel
钢组织设计与控制计算机辅助系统的开发
  • 批准号:
    08305029
  • 财政年份:
    1996
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Development of A New Type of Functional NiAl-base Alloys
新型功能镍铝基合金的研制
  • 批准号:
    06555198
  • 财政年份:
    1994
  • 资助金额:
    $ 4.8万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)

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超硬金属硼化物中的键强化和晶粒尺寸细化
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设计 TGW6 拮抗剂以改善水稻籽粒尺寸。
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合作研究:从岩石到风化层再到河流:风化、粒度以及对土壤生产和河流切割的控制
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粒度分布对粒状土临界状态影响的解析模型
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