摘要
研究了SiC晶须补强Y-TZP基复合材料的显微结构及其力学性能,探讨了晶须性能和t-ZrO_2稳定度对增韧特性的影响规律。分析表明:适当控制稳定剂Y_2O_3的含量以调节t-ZtO_2的稳定度,并选择合适的晶须能使Y-TZP基复合材料中晶须补强与相变增韧产生协同增韧的效果。所研制的添加5 vol.％优质siC晶须的2.2Y-TZP基复合材料,其室温强度和断裂韧性分别达到1130 MPa和19.1 MPa·m^(1/2)。
The microstructure and mechanical properties of SiC whisker reinforced Y-TZP matrix composites have been studied. Thc cffccts of the stability of zirconia and the properties of whisker, matrix and interface on toughening characteristics have been discussed.Thc results show that the synergistic tougbening of whisker reinforcement and transformation toughening can be obtained by carefully controlling the degrees of stabillization of zirconia and selecting the suitable whiskers. The prepared 5 vol.％SiC_w,/2.2Y-TZP composite has fairly high fracture strcngth (1130 MPa) and toughness (19.1 MPa·m^(1/2)) at room temperature.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1992年第3期223-229,共7页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金
中科院高性能陶瓷及超微结构开放实验室基金
关键词
陶瓷
氧化锆
晶须
补强
增韧
zirconia
whisker reinforcement
synergistic toughening
composites
