摘要
研究了莫来石-氧化锆复合陶瓷。用湿化学法制备的纯荚来石其常温抗弯强度和断裂韧性较低,σ_f=236MPa,K_(Ic)=2.5MPa·m^(1/2),而莫来石-氧化锆复合陶瓷的常温强度和韧性大大提高,σ_f=612 MPa,K_(Ic)=5.1MPa·m^(1/2)。研究结果表明:氧化锆的强韧化机理是微应力场作用、应力诱导相变增韧及第二相粒子强化。
Mullite-zirconia composites are studied in the paper. Lower bending strength (σ_1=236MPa) and fracture toughness (K_(1c)=2.5MPa·m^(1/2)) of pure mullite prepared by wet-chemical method are found. But for mullite-zirconia composite, σ_1 (612MPa) and K_(10). (5.1MPa·m^(1/2)) have been increased greatly. The mechanism of strengthening and toughening by zirconia are thought to be the effect of micro-stress field, zirconia transformation toughening, and the second phase particles dispersion strengthening.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1992年第4期353-359,共7页
Journal of The Chinese Ceramic Society
基金
中国科学院上海硅酸盐研究所高性能陶瓷和超微结构开放实验室资助
关键词
莫来石
氧化铬
复合材料
强韧化
muUite
zirconia
composite
strengthening and toughening
