材料工程2016，Vol.44Issue(4)：20-25,6.DOI:10.11868/j.issn.1001-4381.2016.04.004
多壁碳纳米管增强铝基复合材料的高温力学性能
High Temperature Mechanical Properties of Aluminum Matrix Composites Reinforced by Multi-walled Carbon Nanotubes
摘要
Abstract
Aluminum matrix composites reinforced by different contents of multi-walled carbon nano-tubes(MWCNTs)were fabricated by friction stir processing(FSP),and their high temperature me-chanical properties and strengthening mechanism were studied.The results indicate that by adding MWCNTs,the microstructure of the composites becomes finer,and a small amount of nanocrystals and tangled dislocations are brought into the aluminum matrix.Compared with the aluminum matrix, the strength of the composites at high temperature is enhanced significantly through adding MWC-NTs.The strength of the composites is improved gradually,as the MWCNTs content increases,on the contrary,the plasticity of the composites decreases constantly.When the test temperature is 350℃,the tensile strength of 6.6%(volume fraction)MWCNTs/Al composite is up to 78MPa,which is 3 .9 times of aluminum matrix without adding MWCNTs.The dimples of composites fracture grad-ually decreases,exhibits brittle fracture,as the testing temperature increases.关键词
搅拌摩擦加工/多壁碳纳米管/高温强度/高温塑性Key words
friction stir processing/multi-walled carbon nanotube/high temperature strength/high tem-perature plasticity分类
通用工业技术引用本文复制引用
刘强,柯黎明,刘奋成,黄春平..多壁碳纳米管增强铝基复合材料的高温力学性能[J].材料工程,2016,44(4):20-25,6.基金项目
国家自然科学基金资助项目(51265043,51364037) （51265043,51364037）
江西省高等学校科技落地计划资助项目(KJLD13055,KJLD12074) （KJLD13055,KJLD12074）
轻合金加工科学与技术国防重点学科实验室开放基金资助项目(GF201301003) （GF201301003）
