溶胶-凝胶法在SiC纤维表面制备ZrO2界面层的研究

Deposit ZrO2 coatings on SiC fibers with sol-gel method

摘要:

本文采用溶胶凝胶法（sol-gel）在SiC纤维表面制备氧化锆（ZrO2）界面层，并深入研究了前驱体溶胶和烧结温度对界面层的影响规律。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)等测试手段对ZrO2界面层的晶体结构和表观形貌进行了分析。分析结果表明：当烧结温度为1000℃，Zr4 金属离子浓度为1.0mol/L，聚乙烯醇（Polyvinyl alcohol, PVA）含量为30wt.%（质量比）时，能够制备出完整致密的ZrO2界面层。

Abstract:

Zirconia coatings（ZrO2）were deposited on silicon carbide (SiC) fibers with sol-gel method. The influence of precursor zirconium sol and sintering temperature on ZrO2 coatings was studied in this paper. The phase and morphology of ZrO2 coatings were evaluated by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed that the desired ZrO2 coatings were fabricated through dipping out SiC fibers with the precursor of concentration of Zr4 cation 1.0mol/L, polyvinyl alcohol (PVA) 30wt.% and then heated at 1000℃ for 60min.