摘要
运用品须补强和粒子弥散双重手段,对氧化铝材料的性能进行改进。比较了Al_2O_3-TiC(AT),Al_2O_3/SiC_w(As),Al_2O_3-TiC/SiC_w(ATS)材料的力学性能,证实ATS材料有明显的迭加增强增韧效果,并具有良好的高温力学性能。抗氧化实验证实,将SiC晶须加入AT中以后,材料的抗氧化性能有明显改进。从热膨胀失配角度分析和SEM显微结构观察证实,ATS材料的主要增韧机理是界面解离和裂纹偏转。
Strengthening of silicon carbide whiskers and particle dispersion were both used to improve the performances of alumina ceramic. Compared with the experimental results of Al_2O_3-TiC (AT), Al_2O_3/SiC_w (AS) and Al_2O_3-TiC/SiC_w (ATS), it confirms that ATS composites have obvious additive effect of both reinforcing and toughening and good high temperature strength. The oxidation experiment indicates that the oxidation resistance is improved greatly when SiC whisker are introduced. The main toughening mechanism of ATS composite is interface debonding and crack deflection, based on the analysis of thermo-expansion mismatch and the SEM observation of microstrueture.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1993年第4期349-355,共7页
Journal of The Chinese Ceramic Society
关键词
氧化铝
碳化钛
碳化硅
晶须
陶瓷
alumina
titanium carbide
multiphase ceramics
silicon carbide whisker
whisker reinforcing
particle dispersion
interface debonding
crack deflection
