采用挤压铸造法制备出Si_3N_4晶须增强6061铝合金复合材料,复合材料抗弯强度790MPa,经T6处理后提高20％,显微硬度增加28％,用高分辨电镜对晶须和复合材料进行了分析研究,探讨了界面结构与复合材料性能的关系。
The Si_3N_4 whiskers reinforced 6061 Al composite material with bendingstrength 790 MPa was prepared by technique of squeeze casting. After heat treatment under T6regime, i. e. 530℃ 1h solutioning and 160℃ 24 h aging, an increment in strength andmicrohardness may be over 20% and 28% respectively. The microstructures of Si_3N_4 whiskersand Si_3N_4/Al interface were observed by means of HRTEM. The influence of interfacial struc-ture on properties was also discussed.
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