姚敬,鲁世强,肖璇,邓莉萍

• 1:南京航空航天大学材料科学与技术学院
• 2:南昌航空大学材料科学与工程学院

摘要(Abstract)：

采用机械合金化+热压工艺路线来制备化学计量比成分的单相Laves相TaCr_2合金。研究了热压烧结温度(1250、1300、1350、1400℃)及保压时间(0.5、1、2、3 h)对合金组织和室温力学性能的影响。结果表明:热压烧结后的合金由Laves相TaCr_2和微量Ta、Cr三相组成。热压温度对Laves相TaCr_2合金晶粒度和致密度的影响大于保压时间。TaCr_2合金的维氏硬度值随保压时间延长而降低,1400℃×1 h热压合金的维氏硬度最大,达9.75 GPa。1350℃和1400℃热压合金的断裂韧性随热压时间延长而减小。1300~1400℃热压烧结下合金的断裂韧性随着热压温度增加呈下降的趋势,1300℃×3 h热压烧结合金断裂韧性值最高,为4.39 MPa·m~(1/2)。

关键词(KeyWords)： Laves相TaCr_2;热压参数;组织与性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51161020);; 航空科学基金(2015ZF56024);; 江西省自然科学基金(20114BAB216012);; 江西省金属材料微结构调控重点实验室(南昌航空大学)(JW201423001)

作者(Author): 姚敬,鲁世强,肖璇,邓莉萍

DOI: 10.13289/j.issn.1009-6264.2017.04.008

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