碳纳米管含量对MWCNTs/Ag复合材料组织和力学性能的影响

中国有色金属学报, 2016, 26(10): 2102-2109.

碳纳米管含量对MWCNTs/Ag复合材料组织和力学性能的影响

李爱坤 ^1, , 谢明 ^2, , 王松 ^3, , 刘满门 ^4, , 张吉明 ^5, , 陈永泰 ^6,

1.昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明,650106

2.昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明,650106

3.昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明,650106

4.昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明,650106

5.昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明,650106

6.昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明,650106

基金项目: Project(KKSB201451004) supported by Major Program of Science and Technology Department of Yunnan Province,China 稀贵金属综合利用新技术国家重点实验室开放课题(SKL-SPM-201522)Project(u1302272) supported by the National Natural Science Foundation of China-Yunnan Joint Fund NSFC-云南联合基金项目(u1302272) Project(SKL-SPM-201522) supported by the fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,China 云南省科技厅重大项目(KKSB201451004)

关键词：碳纳米管 , 化学镀 , 力学性能 , 复合材料

Effect of MWCNTs content on microstructure and mechanical properties of MWCNTs/Ag composites

Keywords： carbon nanotube , chemical plating , mechanical property , composite

利用化学镀法对MWCNTs镀银并通过高能球磨制备MWCNTs/Ag复合粉末,然后采用粉末冶金法制备MWCNTs增强Ag复合材料,利用扫描电镜对复合粉末的形貌以及复合材料中MWCNTs的分布进行分析,研究MWCNTs含量对MWCNTs/Ag复合材料力学性能的影响.结果表明:球磨后Ag颗粒聚集形成二次大颗粒,随着MWCNTs含量增加,颗粒聚集程度提高.MWCNTs体积分数达到10％后,MWCNTs/Ag复合材料中MWCNTs团聚严重;MWCNTs体积分数增大,复合材料强度、硬度先增大后减小,体积分数为8％时力学性能最佳,抗拉强度和屈服强度分别达到297MPa和245MPa,硬度HV0.1为80.1.复合材料表现出明显的塑性断裂特征,断裂面形成了较多的韧窝,且存在明显的MWCNTs拔出现象,说明MWCNTs起到载荷传递和增强作用.

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