(昆明理工大學(xué) 材料與冶金工程學(xué)院，昆明 650093)
摘 要: 以煤飛灰顆粒為增強相，用液態(tài)燒結(jié)粉末冶金方法，制備了鋁/飛灰復(fù)合材料。用熱力學(xué)數(shù)據(jù)庫分析考察了液相燒結(jié)過程中的反應(yīng)性和新生成相。用XRD分析方法結(jié)合掃描電鏡，研究發(fā)現(xiàn)飛灰中的部分成分與液態(tài)鋁進行了反應(yīng)，形成了單質(zhì)Si，F(xiàn)e，Ti以及Al和Si，F(xiàn)e，Ti的金屬間化合物。反應(yīng)的發(fā)生導(dǎo)致了飛灰顆粒的非晶態(tài)及反應(yīng)特性的改變。
關(guān)鍵字: 鋁/飛灰復(fù)合材料； 反應(yīng)性； 液相燒結(jié)
Al/fly ash particulate composites
CUI Heng
（Faculty of Materials and Metallurgical Engineering，
Kunming University of Science and Technology，Kunming 650093， P.R.China）
Abstract:The Al/fly ash composites were fabricated by liquid sintering P/M process with fly ash particles as reinforcing phases. The reactivity and newly formed phases during liquid sintering process were analyzed by thermochemical data base calculation and XRD characterization. The results show that some of constituents in fly ash react with liquid aluminum so that the elemental Si，F(xiàn)e，Ti as well as some amount of intermetallic compounds form. These in-situ reactions result in the change of reactivity features of amorphous fly ash particles.
Key words: Al/fly ash composites； reactivity； liquid sintering
