在表面机械处理(SMAT)方式下,材料表面可以通过强烈塑性变形而实现纳米化,获得表面为纳米晶、晶粒尺寸沿厚度方向逐渐增大的梯度结构.表面纳米化可以使材料表面硬度提高且整体力学性能得到改善.同时材料表面活性得到极大地提高,为进一步化学处理提供良好的条件.从SMAT的基本原理、制备技术、纳米化机理、结构性能和化学处理等方面介绍了表面机械纳米化研究工作已取得的进展.
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