(上海交通大學(xué)信息存儲(chǔ)中心，上海 200030)
摘 要: 以Al-TiO2反應(yīng)體系為基礎(chǔ)，添加適量石墨粉，壓制后在不同溫度下進(jìn)行反應(yīng)燒結(jié)，從而確定了獲得反應(yīng)完全的Al2O3-TiC/Al鋁基復(fù)合材料的燒結(jié)工藝參數(shù)，并對(duì)該復(fù)合材料的組織性能及反應(yīng)機(jī)理進(jìn)行了分析討論。結(jié)果表明：碳的加入可完全抑制條狀和大塊狀A(yù)l 3Ti相的形成；Al-TiO2-C體系在1200 ℃反應(yīng)燒結(jié)后，可制得硬度較高的Al 2O3-TiC/Al原位復(fù)合材料，其顯微組織中Al2O3和TiC顆粒尺寸小于2μm 。
關(guān)鍵字: 原位反應(yīng)合成 反應(yīng)燒結(jié) 鋁基復(fù)合材料 顯微組織
（Center of Information Storage,Shanghai Jiao Tong University, Shanghai 200030, P. R. China
Department of Metallurgy and Materials Engineering,Chongqing University, Chongqing 400044, P. R. China
Southwest Aluminium Fabrication Plant, Chongqing 401326, P. R. China）
Abstract:An Al2O3-TiC/Al in-situ composites prepared by high-temperature reaction sintering of the Al-TiO2-C system was invest igated, and the effects of process parameters on the microstructure of the Al2O3-TiC/Al composites were discussed. The results showed that the formation of the coarse lath or block Al3Ti compound in the composites can be completely inhibited by carbon additions, and the size of the Al2O3 and TiC particles in the composites is normally less than 2μm after Al-TiO2-C samples are sintered at 1200 ℃.
Key words: in-situ reaction synthesis reaction sintering aluminum matrix composites microstructure
