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.
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 Alflakes.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.
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