摘要
为了提高陶瓷基复合材料的抗氧化性能,分别采用气相、液相渗硅工艺制备了ZrB2-SiC涂层,利用静态氧化试验测试了ZrB2-SiC涂层的抗氧化性能,并分析了涂层的微观结构演化过程。结果表明:气相渗硅工艺制备的涂层抗氧化性能更优良,氧化试验后在涂层表面形成一层致密结构的氧化物层,有效抑制氧化性气体向涂层内部扩散,提高涂层的高温抗氧化防护能力。由于液相渗硅工艺制备的涂层存在残留硅成分和微裂纹,导致涂层高温抗氧化防护能力较差。
Novel zirconium diboride-silicon carbide （ZrB2-SiC） coatings were prepared by vapor silicon infiltration （VSI） and liquid silicon infiltration （LSI）, respectively. The static oxidation resistance properties of these coatings were evaluated and their microstructure evolution during oxidation was studied. It showed that the VSI coating had better oxidation resistance than LSI. A compact oxide scale was formed on the VSI coating, which strongly suppressed fur- ther oxidation damage during the testing. The poor oxidation resistance of the LSI coating could be mainly attributed to micro-cracks and residual silicon.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第10期1158-1162,共5页
Journal of Inorganic Materials
基金
National Natural Science Foundation of China(51202271)
关键词
硼化锆
复合材料
抗氧化性能
zirconium boride
composite materials
oxidation resistance properties
