(河北工业大学 材料科学与工程学院，天津 300130)
摘 要: 提出一种新型的熔体搅拌铸造工艺，解决了Al-Si合金对10μm级以下高体积分数TiN，AlN陶瓷的非真空无压浸润问题，并在此基础上成功制备了高强度低成本的TiN-AlNp/Al-Si复合材料。研究表明， 细小TiN，AlN颗粒在铝熔体中已经实现了润湿，平均尺寸在2～3μm，基本呈均匀分布，与基体结合良好。当TiN，AlN的含量为10% (体积分数)时，复合材料的抗拉强度为335MPa，屈服强度为240MPa，延伸率为2.4%。
关键字: 铝基复合材料；TiN；AlN；润湿性
composites with high strength
（School of Materials Science & Engineering，
Hebei University of Technology，Tianjin 300130，China）
Abstract:A new technology of melt stirring and casting was presented to improve the wettability of TiN and AlN particles less than 10μm with high volume fraction in Al-Si alloy melt at non-vacuum and free-pressure condition. Based on this technology the TiN-AlNp/Al-Si composites with high strength and low cost were fabricated successfully. The results indicate that fine TiN and AlN ceramic particles with the size of 2～3μm have realized wetting with Al-Si melt. The particles basically assume an even distribution and a well bonding with the aluminum matrix. The main properties of the composite with 10% (volume fraction) TiN and AlN are as follows: ultimate tensile strength is 335MPa, yield strength 240MPa and elongation coefficient 2.4%.
Key words: aluminum matrix composite；titanium nitride；aluminum nitride；wettability
