施倩,胡茂良,王飞,王旭忠

• 1:哈尔滨理工大学材料科学与工程学院

摘要(Abstract)：

采用热挤压法制备了双尺寸Al_2O_3颗粒增强AZ31镁基复合材料,利用光学显微镜(OM)、扫描电镜(SEM)、维氏硬度仪和电子万能拉伸试验机等研究了Al_2O_3/AZ31镁基复合材料的组织和力学性能。结果表明:经过热挤压后,双尺寸Al_2O_3颗粒均匀地分布在AZ31基体中,通过纳米颗粒对基体位错运动的钉扎作用和微米颗粒对晶粒长大的抑制作用,使复合材料的晶粒被显著细化。相比于单一尺寸,当添加双尺寸Al_2O_3颗粒时,复合材料的力学性能达到最大值,其硬度、抗拉强度和伸长率分别为85 HV、295 MPa和6.8%。

关键词(KeyWords)： 热挤压法;AZ31镁基复合材料;力学性能;显微组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51404082);; 2018年哈尔滨理工大学大学生创新创业训练计划(201810214187)

作者(Author): 施倩,胡茂良,王飞,王旭忠

DOI: 10.13289/j.issn.1009-6264.2018-0497

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