Ni-CCNTs/AM60复合材料高温性能的研究  

Study on High-temperature Performance of Ni-coated Carbon Nano-tube/AM60 Composite

作　　者：熊淑秋 袁秋红[1] 

机构地区：[1]江西渝州科技职业学院机电工程分院,江西新余338029

出　　处：《热加工工艺》2011年第8期108-111,共4页Hot Working Technology

基　　金：江西省科技厅工业攻关资助项目(Z02727)

摘　　要：在氩气保护下,采用搅拌铸造法制备了化学包覆镍碳纳米管(Ni-CCNTs)/AM60复合材料,测试了铸态条件下复合材料的高温力学性能,并对微观组织和断口形貌进行观测和分析。结果表明:Ni-CCNTs/AM60复合材料具有良好的高温力学性能,在拉伸速度为1 mm/min以及温度为150℃时其抗拉强度达132.77 MPa;当碳纳米管含量过多时,会因团聚而影响复合效果,该复合材料高温性能急剧下降;复合材料的断裂形式由韧窝和撕裂棱组成,其断裂特征更趋向于韧性断裂。Ni-coated carbon nano-tube（Ni-CCNTs）/AM60 composite was fabricated by stirring casting method.High temperature mechanical properties of the composite were tested and the fractograph morphology was observed by SEM.The results show that Ni-CCNTs/ AM60 composite has good mechanical properties at high temperature.When the tensile rate is 1 mm/min,the tensile strength of the composite is up to 132.77 MPa at 150 ℃.But the high temperature mechanical properties fall down with the addition of Ni-CCNTs.The fracture mode of the composite mainly consists of quasi-cleavage crack,dimple and tear edge,which show the feature of gliding fracture.

关 键 词：AM60镁合金 化学包覆镍碳纳米管 复合材料 高温力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TB333[金属学及工艺—金属材料]