刘莉,朱冬冬,刘洋,董多,王晓红,王晔

• 1:哈尔滨理工大学材料科学与工程学院
• 2:衢州学院浙江省空气动力装备技术重点实验室

摘要(Abstract)：

采用真空电弧熔炼炉制备了碳纳米管(CNTs)增强Ti-48Al-2Cr-2Nb合金,研究不同CNTs添加量对Ti-48Al-2Cr-2Nb合金微观组织及力学性能的影响。结果表明:向Ti-48Al-2Cr-2Nb合金中添加CNTs后有Ti_2AlC相析出,Ti_2AlC相的含量随着CNTs含量的增加而增加。添加0.3 at%CNTs后,合金中析出少量的Ti_2AlC相;当CNTs含量为0.6 at%时,合金中Ti_2AlC相呈颗粒状沿晶界分布;CNTs含量增加至0.9 at%后,片层组织中出现沿片层分布的Ti_2AlC颗粒,同时片层组织中还出现了长条状Ti_2AlC相呈穿片层分布。合金的硬度、抗压强度和压缩率均随CNTs含量的增加呈现上升趋势。当CNTs含量为0.9 at%时,合金的抗压强度,压缩率和硬度最佳,分别为1693.0 MPa, 1.31%和429.4 HV,相较于未添加CNTs的Ti-48Al-2Cr-2Nb合金分别提高了213.3%,211.9%和12.7%,细晶强化和固溶强化是合金强化的主导作用。

关键词(KeyWords)： TiAl合金;碳纳米管(CNTs);显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51801112,52071188);; 浙江省自然科学基金(LY18E010003,LQ20E010003)

作者(Author): 刘莉,朱冬冬,刘洋,董多,王晓红,王晔

DOI: 10.13289/j.issn.1009-6264.2020-0444

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