碳源对自蔓延高温合成TiC-Al_2O_3/Fe_3Al复合材料的影响  

Effect of Carbon Sources on TiC-Al_2O_3/Fe_3Al Composite Prepared by Self-propagating High-temperature Synthesis

作　　者：邹正光[1] 李晓敏[1] 吴一[1] 尹传强[1] 

机构地区：[1]桂林工学院有色金属材料及其加工新技术教育部重点实验室,广西桂林541004

出　　处：《矿冶工程》2006年第3期68-70,共3页Mining and Metallurgical Engineering

基　　金：广西自然科学基金(桂科基0575104);广西教育厅重点基金(桂教科研2003-22);广西新世纪十百千人才工程基金(2002210)

摘　　要：以天然钛铁矿为主要原料,采用自蔓延高温合成(SHS)技术,通过铝热、碳热还原法合成了金属间化合物/陶瓷基复合材料。探讨了碳源(石墨和碳黑)对FeTiO3-A l-C体系自蔓延高温合成过程及产物结构特征的影响。结果表明:石墨作碳源燃烧合成的TiC更接近于化学计量比的TiC,且TiC颗粒较粗,燃烧温度、燃烧波速度均较高,反映了碳源结构差异对燃烧合成的影响。TiC-Al2O3/Fe3Al composite （I/CMC） was synthesized by in-situ carbothermal and aluminothermal reduction using natural ilmenite as raw materials. The effects of carbon sources on the SHS processes of the FeTiO3-Al-C system and the structure features of the as-obtained powders were investigated. It is shown that the TiC synthesized with graphite as carbon sources is more close to the stoichiometric TiC. The size of TiC particles is larger and the combustion temperature and the velocity of combustion wave are higher than that with carbon black as carbon sources. The results reflect the effect of structural differences between the two carbon sources on the synthesis of TiC-Al2O3/Fe3Al composite by SHS.

关 键 词：碳源 钛铁矿 FeTiO3-Al—C体系 自蔓延高温合成 

分 类 号：TB333[一般工业技术—材料科学与工程] TF125.31[冶金工程—粉末冶金]