材料工程Issue(8)：45-50,6.
先驱体转化制备ZrO2改性SiC陶瓷的氧化行为研究
Oxidation Behavior of ZrO2-doped Silicon Carbide Ceramics by Precursor Infiltration Pyrolysis Technique
摘要
Abstract
ZrO2 modified silicon carbide (SiC) ceramics was fabricated with polycarbosilane, divinyl-benzene and zirconium rc-butoxide by precursor infiltration pyrolysis technique, and oxidation behavior was investigated by means of XRD,SEM and EDS. The results showed that after impregnation of ZrO2, the SiC ceramics began to be oxided at 1600℃ , and bubbles appeared on the surface because of SiO2oxidation resistant layer formed. When oxided at 1700℃ , the ceramics showed severe oxidation, with serval pit at the surface and a certain mass loss; both of the surface and inner of the ceramics were oxided after oxidation at 1700℃ ,and the mostly component of the surface was SiO2,meanwhile, SiC in the inner was partly oxided to SiO2 ,both of the oxidation layers of the two ceramics were gradient; The transformation from the tetragonal phase to the monoclinic phase of ZrOz happened at high temperature during oxidation, the existence of SiC can prevent this phase transformation while SiO2 can't.关键词
ZrO2/SiC陶瓷/先驱体转化法/氧化行为Key words
ZrO2 /SiC ceramic/precursor infiltration pyrolysis/oxidation behavior分类
化学化工引用本文复制引用
王生学,李伟,陈朝辉..先驱体转化制备ZrO2改性SiC陶瓷的氧化行为研究[J].材料工程,2012,(8):45-50,6.基金项目
国家自然科学基金重大专项资助(90916002) （90916002）
