刘董超,王武孝,陈晓港,李武钊,刘争争,赵宇

• 1:西安理工大学材料科学与工程学院

摘要(Abstract)：

采用维氏显微硬度计、扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)等研究了Al_2O_(3f)/Mg-6Al-1Nd-1Gd复合材料的显微组织和时效行为。结果表明：复合材料的组织主要由α-Mg、Al_2O_3、β-Mg_(17)A1_(12)、Mg_2Si、MgO、Al_2Nd、Al_2Gd以及Al_(11)Nd_3相组成。Al_2O_3短纤维的引入加速了基体合金的时效动力学，使基体合金的时效峰值时间由32 h显著缩短至24 h。时效过程中，β-Mg_(17)Al_(12)相主要以连续析出和非连续析出两种形式析出，连续析出和非连续析出的生长呈竞争关系，随着时效时间的增加，非连续析出相逐渐长大并由晶界向晶粒内部推移，过时效阶段晶粒内部出现成片的非连续析出相。

关键词(KeyWords)： Al_2O_(3f)/Mg-6Al-1Nd-1Gd复合材料;时效行为;显微组织;硬度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51771146);; 陕西省自然科学基金(2022JM-232)

作者(Author): 刘董超,王武孝,陈晓港,李武钊,刘争争,赵宇

DOI: 10.13289/j.issn.1009-6264.2022-0461

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