(上海交通大學(xué) 金屬基復(fù)合材料國家重點(diǎn)實(shí)驗(yàn)室， 上海 200030)
摘 要: 利用TiB2顆粒在共晶AlSi基體中易于分散和生成顆粒超細(xì)的原理， 用混合鹽法制備了原位TiB2顆粒增強(qiáng)ZL109為基體的復(fù)合材料。顆粒加入后材料的硬度明顯提高，如對顆粒質(zhì)量分?jǐn)?shù)為8.3%的復(fù)合材料材料T6處理后， 其布氏硬度較基體ZL109提高了41.7%。 對不同顆粒質(zhì)量分?jǐn)?shù)的復(fù)合材料固溶時(shí)效行為的研究表明，顆粒的加入， 抑制了材料的固溶擴(kuò)散進(jìn)程， 加速了復(fù)合材料的時(shí)效進(jìn)程。 用有效擴(kuò)散理論分析了顆粒增強(qiáng)復(fù)合材料的固溶時(shí)效特性。
關(guān)鍵字: ZL109復(fù)合材料； 原位合成； 固溶時(shí)效； 有效擴(kuò)散
WANG Hao-wei
（ State Key Laboratory of Metal Matrix Composites,
Shanghai Jiao Tong University, Shanghai 200030, China）
Abstract: The salt-mixture methods were used to synthesize the in-situ TiB2 particles reinforcing Al-Si alloy composites. The composites were inclined to be uniform in ZL109 matrix, and the size of the prepared particles is fine. With the addition of TiB2 particles, the hardness of the composites is improved obviously and the hardness of 8.3% TiB2/ZL109 is improved by 41.7% than that of ZL109 at T6 status. The solution process of the materials is restrained by TiB2 particles, while the aging process of the composites is accelerated by TiB2 particles. The solution and aging behaviors of the composites are analyzed through effective diffusivity theoretical equation.
Key words: ZL109 composites; in-situ synthesis; solution and aging; effective diffusivity
