| 纳米材料晶粒生长理论的研究进展 |
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| 引用本文： | 李伟,刘平,马凤仓,刘新宽,戎咏华.纳米材料晶粒生长理论的研究进展[J].材料导报,2010,24(23). |
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| 作者姓名： | 李伟 刘平 马凤仓 刘新宽 戎咏华 |
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| 作者单位： | 上海理工大学材料科学与工程学院,上海,200093;上海交通大学材料科学与工程学院,上海,200240 |
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| 基金项目： | 国家自然科学基金资助项目(50871069); 上海市教委“晨光计划”资助项目(09CG51); 上海高校选拔培养优秀青年教师科研专项基金资助项目(slg09015) |
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| 摘 要： | 实验研究表明,纳米材料的晶粒生长速率远低于传统晶粒长大理论所预测的生长速率,为解释这一异常的晶粒生长行为,研究者提出了各种理论模型。综述了纳米晶粒生长理论模型的研究现状:第一类为动力学模型,通过钉轧晶界实现延缓晶粒的生长,起钉轧晶界作用的有溶质原子、三叉晶界和第二相等;第二类是热力学模型,通过降低晶界能来降低晶粒生长的驱动力,从而实现延缓晶粒的生长,如溶质原子偏析晶界和空位注入模型等。对各种理论模型进行了描述和分析,并展望了其发展方向。
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| 关 键 词： | 纳米材料 晶粒生长 热稳定性 理论模型 |
Progress in Research of Grain Growth Theory for Nanostructured Materials |
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| LI Wei,LIU Ping,MA Fengcang,LIU Xinkuan,RING Yonghua.Progress in Research of Grain Growth Theory for Nanostructured Materials[J].Materials Review,2010,24(23). |
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| Authors: | LI Wei LIU Ping MA Fengcang LIU Xinkuan RING Yonghua |
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| Affiliation: | LI Wei1,LIU Ping1,MA Fengcang1,LIU Xinkuan1,RING Yonghua2(1 School of Materials Science , Engineering,University of Shanghai for Science , Technology,Shanghai 200093,2 School of Materials Science , Engineering,Shanghai Jiao Tong University,Shanghai 200240) |
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| Abstract: | It is experimentally reported that the grain growth rate for nanostructured material is much lower than that which the conventional grain growth theory predicts.Various theoretical models are developed to explain the abnormal grain growth behavior for nanostructured materials.The general developments of these theoretical models are summarized,into which two kinds of models are divided.One is the dynamic model,which inhibits the grain growth by pinning grain boundaries and includes the solute drag,triple jun... |
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| Keywords: | nanostructured materials grain growth thermal stability theory model |
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