摘要
采用片状粉末冶金技术制备碳纳米管/铝(CNT/Al)复合材料,并研究其力学性能。首先,通过聚合物热解化学气相沉积法(PP-CVD)在微纳铝片表面原位生长碳纳米管制备CNT/Al片状复合粉末,随后对该片状复合粉末进行冷压成形、烧结致密化和挤压变形加工等,制备致密的CNT/Al复合材料块体。实验结果表明,相比铝基体,所制备的1.5%CNT/Al复合材料抗拉强度和模量分别提高了18.5%和23.7%,3.0%CNT/Al复合材料抗拉强度和模量分别提高了31.4%和74.1%,但由于铝基体的细晶强化和位错强化作用,使其塑性分别下降至4.96%和1.5%。
The carbon nanotube/aluminum(CNT/Al)composites were fabricated by flake powder metallurgy,and investigated the mechanical properties.First,flaky CNT/Al composite powders were prepared by in-situ growth of CNTs on the submicron sized Al flakes with the polymer pyrolysis chemical vapor deposition(CVD)methods.Then the flaky CNT/Al composite powders were compacted,sintered and extruded to fabricate dense bulk CNT/Al composites.The results show that,Compared with the Al matrices,the tensile strength and modulus of the 1.5%CNT/Al composites are increased by 18.5%and 23.7%,while the tensile strength and modulus of the 3%CNT/Al composites are increased by 31.4%and 74.1%.However,their tensile elongations decrease to 4.96%and 1.5%,respectively,which may be owning to the grain refinement and dislocation strengthening mechanisms.
作者
王雷
尹华
徐润
谭占秋
范根莲
李志强
张荻
WANG Lei;YIN Hua;XU Run;TAN Zhanqiu;FAN Genlian;LI Zhiqiang;ZHANG Di(Integration Platform Department, CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130062, China;State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering,Shanghai Jiao Tong University, Shanghai 200240, China)
出处
《粉末冶金材料科学与工程》
EI
北大核心
2019年第1期63-67,74,共6页
Materials Science and Engineering of Powder Metallurgy
基金
国家自然科学基金资助项目(51671130
51871149)
国家重点研发计划项目(2016YFB1200506
2017YFB1201105)
上海市自然科学基金资助项目(15JC1402100
14DZ2261200)
关键词
碳纳米管
铝基复合材料
化学气相沉积
片状粉末冶金
力学性能
carbon nanotubes(CNTs)
aluminum matrix composites
chemical vapor deposition
flake powder metallurgy
mechanical property
