宇航材料工艺2012，Vol.42Issue(2)：84-87,4.
多孔Si3N4表面Al-Y-Si-O-N陶瓷涂层的制备和表征
Fabrication and Characterization of Al-Y-Si-O-N Ceramic Coating on Porous Si3N4 Surface
摘要
Abstract
Dense Al-Y-Si-O-N ceramic coating on the surface of porous Si3N4 was fabricated with oxides of Al2O3-Y2O3-SiO2 sol and Si3N4 of porous substrate using sol-gel method. Microstructure and properties of ceramic coating at the different temperatures were studied mainly. Phase composition and element component was analysed by XRD pattern and EDS, respectively, and microscopic morphology of surface and cross-section of coating was observed by the SEM. The ceramic coating is densified when the coating is sintered at 1 400°C, and phase compositions of coating are consisted of p-sialon, Si2ON, SiO2 and amorphous phase. The results show that the water absorption of porous Si3N4 is decreased from 32. 8% to 90% , and the flexural strength of porous Si3N4 is increased from 2. 1% to 25.9%.关键词
多孔氮化硅/陶瓷涂层/溶胶-凝胶/吸水率/弯曲强度Key words
Porous silicon nitride/ Ceramic coating/ Sol-gel/ Water absorption/ Fexural strength引用本文复制引用
王超,赵国庆,范锦鹏,张大海,王红洁..多孔Si3N4表面Al-Y-Si-O-N陶瓷涂层的制备和表征[J].宇航材料工艺,2012,42(2):84-87,4.基金项目
国家自然科学基金项目(90816018) （90816018）
