(中南大學(xué) 粉末冶金國(guó)家重點(diǎn)試驗(yàn)室，長(zhǎng)沙 410083)
摘 要: 應(yīng)用新型化學(xué)涂層工藝(置換法)，成功地制備出結(jié)合緊密、光滑的Ni涂SiC粉末；分析對(duì)比了兩種不同涂層工藝原理及涂層效果；分析了不同SiC增強(qiáng)Al-Fe-V-Si(0812)復(fù)合材料物理和力學(xué)性能。結(jié)果表明：涂覆后的SiC與基體結(jié)合牢固，涂覆層(Ni)的加入降低了材料內(nèi)部顆粒(SiCp)與基體(Al-Fe-V-Si)之間的孔隙，10%SiC(Ni)(質(zhì)量分?jǐn)?shù))/Al-Fe-V-Si(0812)復(fù)合材料在室溫的斷裂強(qiáng)度分別比基體和10%SiCp(質(zhì)量分?jǐn)?shù))/Al-Fe-V-Si(0812)復(fù)合材料增加了62.15%和2.82%，在400℃時(shí)分別增加了55.3%和28.6%。
關(guān)鍵字: 化學(xué)涂層； 置換法； 熱擠壓；耐熱鋁基復(fù)合材料
reinforced heat resistance aluminium matrix composites
（State Key Laboratory for Powder Metallurgy，
Central South University， Changsha 410083， P.R.China）
Abstract: The process of a new powder chemical coating (replacement reaction method) to produce nickel-coated SiC particulates has been studied and two kinds of coating process and coating result were also analyzed, the physical and mechanical properties of different materials were compared. The results show that the strength of 10%SiC(Ni)/Al-Fe-V-Si(0812) composites is 62.15% and 2.82%higher than that of the matrix Al-Fe-V-Si(0812) alloy and 10%SiCp/Al-Fe-V-Si(0812) composites in ambient temperature，and 55.3% and 28.6% higher in 400℃ respectively.
Key words: chemical coating; replacement reaction method; hot extrusion; high thermal stability aluminum matrix composite
