摘要
研究了用微米级Ti3SiC2陶瓷颗粒与Al粉复合球磨制备纳米复合材料的工艺过程。结果表明,在其他实验参数相同的条件下,不同材质的磨球对陶瓷颗粒的细化作用差异很大。采用氧化锆磨球可以使Ti3SiC2的颗粒更好地细化且均匀分散在Al基体中,而用钢球和玛瑙球则易产生混合粉的团聚。用氧化锆球进行球磨后的复合粉在550℃的温度及20 MPa的压力下成功地制备了组织成分均匀的大块纳米复合材料。与同成分的非纳米材料相比,Ti3SiC2/Al纳米复合材料的硬度从HV60提高到HV80,强度则从110 MPa提高到150 MPa。
Ti3SiC2/Al nanocomposite was prepared by using the powder metallurgy method. The results indicate that the conformation of the mixture has a significant difference with the milling ball. The particle size of Tia SiC2 will be decreased to about 100 nm and the particles distribute homogeneously in the aluminum powder prepared with zirconia balls, whereas the conglomeration will be formed using steel balls and agate balls. Bulk homogeneous Tia SiC2/Al nanocomposite can be synthesized by hot - pressing the mixed powder under a pressure of 20 MPa at 550 ℃. Compared with the popular Tia SiC2/Al composite, the Tia SiC2/Al nanocomposite has a significant improvement in hardness （from HV 60 to HV 80） and strength （from 110 MPa to 150 MPa）.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2006年第6期134-137,共4页
Acta Materiae Compositae Sinica
关键词
金属基纳米复合材料
球磨材料
粉末冶金
metal-matrix nanocomposite； ball milling material
powder metallurgy
作者简介
通讯作者：谷万里，博士，副教授，研究方向为金属基复合材料E-mail：guwanli@sdut．edu．cn
