尚拴军,邓鹏辉,蔡刚毅,田野

• 1:河南工业大学机电工程学院
• 2:华中科技大学武汉光电国家实验室

摘要(Abstract)：

采用热挤压法破碎铸态SiCp/AZ91镁基复合材料中的Mg_(17)Al_(12),对Mg_(17)Al_(12)破碎及弥散分布行为进行研究,并对复合材料的力学性能进行表征。结果表明:铸态SiCp/AZ91复合材料经热挤压后,不规则片状及线形Mg_(17)Al_(12)在基体合金和SiC颗粒的剪切应力场作用下,破碎成大量亚微米级的颗粒,并随基体合金的塑性变形发生重新分布,弥散分布在动态再结晶晶粒的晶界附近,通过钉扎晶界作用能够细化复合材料晶粒尺寸到2.3μm。此外,破碎化的Mg_(17)Al_(12)还起到弥散强化基体的作用,与晶粒细化协同作用,显著提高了复合材料的强度。

关键词(KeyWords)： 镁基复合材料;Mg17Al12相;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 河南省科技厅自然科学项目(172102210029);; 河南省教育厅高等学校重点科研项目计划(17A130004)

作者(Author): 尚拴军,邓鹏辉,蔡刚毅,田野

DOI: 10.13289/j.issn.1009-6264.2017-0255

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