ZrO_2-SiC复合材料的合成及其添加对Al_2O_3-C质耐火材料抗氧化性能的影响  

SYNTHESIS OF ZrO_2-SiC COMPOSITE AND EFFECT OF ITS ADDITION ON THE OXIDATION RESISTANCE OF Al_2O_3-C REFRACTORY

作　　者：马北越[1] 于景坤[1] 孙勇[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004

出　　处：《金属学报》2007年第10期1059-1064,共6页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目50274021;上海宝钢集团公司基金项目资助

摘　　要：以锆英石和碳黑为原料,利用碳热还原反应在氩气气氛下合成了ZrO_2-SiC复合材料,并将其添加到Al_2O_3-C质耐火材料中.研究了加热温度对ZrO_2-SiC复合材料合成的影响以及添加ZrO_2-SiC对耐火材料抗氧化性能的影响.采用XRD分析合成材料的相组成,利用SEM观察材料的显微结构.研究表明,提高加热温度有利于ZrO_2-SiC复合材料的合成,在本实验条件下合成该材料的适宜温度为1873K.通过添加合成的复合材料,明显改善了Al_2O_3-C质耐火材料的抗氧化性能,且当添加6%(ZrO_2-SiC)复合材料时,耐火材料的抗氧化性能最佳.ZrO2-SiC composite has been synthesized from zirconite and carbon black by carbothermal reduction reaction in argon atmosphere, which was added to Al2O3-C refractory to study the improvement of oxidation resistance of the Al2O3-C refractory, and the effect of heating temperature on the synthesis of ZrO2-SiC composite was also investigated. The phase composition and microstructure of the synthesized composite were investigated by XRD and SEM. The results showed that increasing the heating temperature could promote the synthesis of ZrO2 SiC composite and the proper temperature to synthesize the composite was 1873 K in this experimental condition. Adding the synthesized composite improved the oxidation resistance of the Al2O3-C refractory obviously and the refractory with 6%（ZrO2-SiC） had the best oxidation resistance.

关 键 词：ZrO2-SiC复合材料 合成 碳热还原 Al2O3-C质耐火材料 抗氧化性 

分 类 号：TF065.1[冶金工程—冶金物理化学]