球磨方式对CNTs/Al复合材料显微组织与力学性能的影响  

Effect of ball milling process on microstructure and mechanical properties of CNTs/Al composites

作　　者：游远琪 李才巨[1] 杨超[1] 邢辕 彭言之 易健宏[1] YOU Yuanqi;LI Caiju;YANG Chao;XING Yuan;PENG Yanzhi;YI Jianhong(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《粉末冶金技术》2024年第4期331-337,345,共8页Powder Metallurgy Technology

基　　金：云南省重大科技专项(202202AG050011,202202AB080004);云南省中青年学术和技术带头人后备人才项目(202005AC160039)。

摘　　要：采用湿法球磨和干法球磨两种方式制备碳纳米管(carbon nanotubes,CNTs)和铝的复合粉体,再使用放电等离子烧结结合热挤压的工艺制备碳纳米管增强铝基(CNTs/Al)复合材料,系统研究了制备工艺-组织结构-材料性能之间的关系。结果表明,相较于干法球磨,湿法球磨可以更好地分散碳纳米管,且显著减少对其结构的破坏;乙醇球磨介质具有冷却作用,在减少粉体冷焊的同时有助于细化Al基体晶粒,从而使复合材料获得出色的力学性能。乙醇湿法球磨6 h后烧结并热挤压的2%CNTs/Al复合材料抗拉强度达到207 MPa。Carbon nanotubes(CNTs)and aluminum composite powders were prepared by both wet ball milling and dry ball milling.The CNTs reinforced aluminum matrix(CNTs/Al)composites were fabricated by sparking plasma sintering(SPS)combined with hot extrusion process,and the relationship of preparation process,microstructure,and mechanical properties was explored systematically.The results show that,compared with the dry ball milling,the wet ball milling can better disperse CNTs,and significantly reduce the damage to the structure of CNTs.The ethanol ball milling medium has the cooling effect to significantly refine the grain size and reduce the cold welding of the powders,resulting in the excellent mechanical properties of the composites.The tensile strength of 2%CNTs/Al composites sintered and hot extruded after wet ball milling for 6 h reaches 207 MPa.

关 键 词：CNTs增强铝基复合材料 球磨工艺 湿法球磨 显微组织 力学性能 

分 类 号：TF125[冶金工程—粉末冶金] TG142.71[冶金工程—冶金物理化学]