摘要
综述了ZrB_2及其复合陶瓷的高温氧化行为,认为ZrB_2陶瓷是一种优异的高温结构材料,其氧化失效是由于氧化产物B_2O_3保护层挥发失效而导致的;二元陶瓷ZrB_2-SiC由于SiC的加入,高温抗氧化性能大大提高,并对其在不同温度下的氧化物结构进行了阐述。在此基础上提出了进一步提高ZrB_2-SiC陶瓷抗氧化性能和服役温度的方法,并以添加TaC和LaB_6形成三元复相陶瓷为例进行了说明。
In this paper, the oxidation behaviors of ZrB2 and its composites were reviewed. The results shown that the ZrB2 ceramic is one of the promising high-temperature structure materials. The failure of ZrB2 ceramic was due to the volatile and failure of B2O3 protective layer. For the ZrB2-SiC composite ceramic, its antioxidant property was improved at high temperatures by the addition of SiC. Also, the oxide structures of ZrB2-SiC ceramic at different temperatures were described in detail. Based on these discussions, a new way for further improving oxidation resist- ance and service temperature of ZrB2-SIC ceramic was described and illustrated by addition of TaC and LaB6 to form ternary composite ceramics.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2015年第3期1-6,共6页
Aerospace Materials & Technology
