摘要
为改善碳纳米管在铝合金基体中的分散性和发挥其增强作用,分别采用湿混、球磨以及湿混后球磨的方式将碳纳米管与铝合金粉末进行混合,再经真空烧结制备出碳纳米管增强铝合金复合材料.不同混合工艺的对比试验结果表明:碳纳米管于液相环境下被均匀分散并吸附于铝合金颗粒表面,但在烧结过程中易再次发生团聚;而较长时间的机械球磨会对碳纳米管结构造成一定程度的破坏.相比下,液相分散与机械球磨结合的方式提高了碳纳米管的分散程度和缩短了球磨时间,碳纳米管增强铝合金材料(3%CNTs/5083Al)的抗拉强度达620 MPa.
In order to improve the dispersion of carbon-nanotubes （CNTs） in the aluminum alloy matrix and its enhancement role, the CNTs reinforced aluminum alloy composites were fabricated by sintering under vacuum with the mixture powders of CNTs and aluminum alloy, which were prepared respectively via wet-mixing, ball- milling and ball-milling with wet-mixed powder. The results indicated that CNTs were well-dispersed in a liquid environment and adhered to the surface of aluminum particles, but tended to re-aggregation under sintering. While ball-mixing with an extended duration, CNTs suffered serious damage. By combing the liquid phase dispersion and a short time mechanical milling, CNTs were efficiently distributed into the aluminum matrix, and the tensile strength of the as-prepared 3% CNTs/5083A1 composite reached 620 MPa.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2015年第6期104-108,共5页
Materials Science and Technology
基金
国家电网公司科技项目(WNZ 121-0022)
关键词
碳纳米管增强铝合金复合材料
湿混
机械球磨
真空烧结
carbon-nanotube reinforced aluminum alloy composites
wet-mixing
ball-milling
vacuum sintering
作者简介
王利民（1982-），男，博士，高级工程师．E-mail：wanglimin@sgepfi．sgcc．com．cn．
