高分散多壁碳纳米管增强铝基复合材料的制备

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1.
Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;
2.
Engineering Research Institute, Tehran, Iran

Fabrication of well-dispersed, multiwall carbon nanotube-reinforced
aluminum matrix composites

1.
Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;
2.
Engineering Research Institute, Tehran, Iran

摘要: 采用机械合金化技术制备高分散多壁碳纳米管（MWCNTs）-铝（Al）复合材料。将纯度99%的铝粉和质量分数2％的MWCNTs经超声和水平球磨处理使Al颗粒与MWCNTs间产生机械键合力。场发射SEM观察表明,MWCNTs分散在Al薄片的表面，随球磨时间的不同，颗粒大小和形貌各异。采用加压烧结手段将混合粉末加工成块体材料，其微观硬度测试表明,加入MWCNTs后Al基体的机械性能得到提高。
- 多壁碳纳米管 /
- 金属基体复合材料 /
- 球磨
Abstract: Mechanical alloying was used to disperse multiwall carbon nanotubes (MWCNTs) in an aluminum (Al) matrix. Mixtures consisting of 99% pure Al powder and a mass fraction of 2% MWCNTs were sonicated. Then, horizontal ball milling was used to generate mechanical bonding between the Al particles and the MWCNTs. The structure observed by a field-emission scanning electron microscope revealed an attachment of MWCNTs to the surface of the Al-flakes. FESEM results showed that particle size and morphology varied with milling time. Finally, the composite powders were processed into bulk material by compaction and sintering. The macro-hardness confirmed the improvement in the mechanical properties due to the addition of MWCNTs to the Al matrix
- Multiwalled carbon nanotube /
- Metal matrix composite /
- Ball milling