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| 多壁碳纳米管增强银基复合材料的组织与性能 |
| Microstructure and Properties of Silver Matrix Composite Reinforced with Multi-walled Carbon Nanotubes |
| 投稿时间：2017-11-14 |
| DOI： |
| 中文关键词: 碳纳米管 CNTs/Ag 微观结构 硬度 抗拉强度 |
| 英文关键词: carbon nanotubes CNTs/Ag microstructure hardness tensile strength |
| 基金项目:国家自然科学基金(51707087、51267007、51507075)。 |
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| 中文摘要: |
| 采用化学镀方法将银沉积在碳纳米管上，获得体积分数为8%的多壁碳纳米管/银(CNTs/Ag)复合粉末，通过高能球磨、压制烧结、热挤压粉末冶金手段制备了CNTs/Ag复合材料，并研究了复合材料的微观组织、导电率、抗拉强度及硬度。结果表明，化学沉积工艺能够显著改善CNTs和Ag之间的界面结合，进而提高CNTs/Ag复合材料的加工性能。与纯银比较，CNTs/Ag复合材料的抗拉强度增加了65%，硬度增加了近2倍，表明CNTs对银具有较好的强化作用。 |
| 英文摘要: |
| Multi-walled carbon nanotubes/silver (CNTs/Ag) composite powders with 8% volume fraction of CNTs were prepared by chemical plating of Ag on the CNTs. CNTs/Ag composite was fabricated by powder metallurgy through high-energy ball milling, pressing and sintering, hot pressing and hot extrusion. The microstructure, electrical conductivity, tensile strength and hardness of the composite were measured. The results show that the interface bonding between the CNTs and the Ag substrate is improved by the chemical plating process, ensuring good processing performance of the resulting composite. The tensile strength of the composite increases by 65% and the hardness doubles, indicating a good reinforcement effect of CNTs. |
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