摘要
通过在铜和钛的混合粉末中引入石墨烯增强相,使用超声分散和球磨法对粉末进行均匀分散、混合,采用放电等离子烧结(SPS)的方法制备石墨烯增强铜基复合材料,研究了烧结温度对复合材料组织和性能的影响规律。结果表明:随着烧结温度的升高,复合材料组织中晶粒尺寸总体上不断增大,孔隙等缺陷则相应有所减少;复合材料密度值和硬度值随着烧结温度的升高呈上升趋势,而导电率逐渐下降。在750℃的烧结温度下,复合材料导电率最高,达到56. 8%IACS;在900℃的烧结温度下,复合材料密度为8. 54 g/cm^3,达到纯铜(8. 51 g/cm^3)水平,而布氏硬度值达到66. 4 HBW,较纯铜(46. 6 HBW)提高了42. 5%。
Graphene-reinforced phase was added in the mixed copper/titanium powder. The mixed powder was evenly dispersed and mixed by ultrasonic dispersion and ball mill method,and then the graphene-reinforced copper matrix composite was fabricated by spark plasma sintering( SPS). Influence of sintering temperature on the microstructure and mechanical properties of the composite were studied. The results show that with the increase of sintering temperature,the grain size of the composite is gradually increased,and the defects such as pores are decreased correspondingly. As the sintering temperature increases from 750 ℃ to 900 ℃,the density and the Brinell hardness of the composite show a rising trend respectively,while the electrical conductivity decreases. When the sintering temperature is 750 ℃,the conductivity of the composite reaches the highest value 56. 8% IACS. When the sintering temperature is 900 ℃,the density of the composite reaches 8. 54 g/cm^3,which is close to the level of pure copper( 8. 51 g/cm^3),and the Brinell hardness value is 66. 4 HBW,which is increased by 42. 5% compared with that of the pure copper.
作者
刘宇宁
甘春雷
王顺成
黎小辉
郑开宏
张辉
Liu Yuning;Gan Chunlei;Wang Shuncheng;Li Xiaohui;Zheng Kaihong;Zhang Hui(College of Materials Science and Engineering,Hunan University,Changsha Hunan 410082,China;Guangdong Institute of Materials and Processing,Guangzhou Guangdong 510650,China;Guangdong Provincial Key Laboratory for Technology and Application of Metal Toughening,Guangzhou Guangdong 510650,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2019年第2期113-118,共6页
Heat Treatment of Metals
基金
广东省科学院项目(2018GDASCX-0117)
广东省科技计划项目(2017A050503004
2014B010105009
2017A070701029)
广州市科技计划项目(201607010211)
