粉末冶金技术2011，Vol.29Issue(5)：344-350,356,8.
镀W碳纳米管增强Al基复合材料的力学性能与导电率
Mechanical properties and electrical conductivity of tungsten-coated carbon nanotube reinforced aluminum matrix composites
聂俊辉 1史娜 1张亚丰 1贾成厂1
作者信息
- 1. 北京科技大学材料科学与工程学院粉末冶金研究所,北京100083
- 折叠
摘要
Abstract
Carbon nanotubes(CNTs)were coated by tungsten layer using carbonyl thermal decomposition process and tungsten hexacarbonyl as a precursor. Aluminum matrix composites reinforced with W-coated CNTs (W-CNTs) were fabricated by mechanical milling and spark plasma sintering processes. The influences of milling time and W-CNTs content on the mechanical properties and electrical conductivity of composites were studied. The results show that the relative density of the composites fabricated by 6 hours' milling and spark plasma sintering is 99. 5% , close to full density. The tensile strength and electrical conductivity of W-CNTs/Al composites decrease with increasing milling time. The W-CNTs can uniformly disperse within aluminum powders when W-CNTs content is less than 0. 75wt% ,but high content of W-CNTs (＞0. 75wt% ) can resulted in the formation of W-CNTs clusters in the mixed powders. Compared with sintered pure aluminum, the tensile strength and hardness of 0. 75wt% W-CNTs/Al composites increase by 28.3% and 11.0%, respectively. However, the electrical conductivity of 0.75wt% W-CNTs/Al composites reach up to 93. 9% of sintered pure aluminum.关键词
碳纳米管/镀W/Al/球磨/力学性能/导电率Key words
carbon nanotubes/ tungsten layer/ aluminum/ milling/ mechanical properties/ electrical conductivity引用本文复制引用
聂俊辉,史娜,张亚丰,贾成厂..镀W碳纳米管增强Al基复合材料的力学性能与导电率[J].粉末冶金技术,2011,29(5):344-350,356,8.
