摘要
Nine kinds of glass-ceramic matrix composites with different compositions and inter facial strength(L) were prepared. The influence of Ti on the fracture toughness (K1c.) of composites was studied. It was discoved that, for the system no chemical reaction taking place at the interface, K1c. increased proportionallywith ts increasing at the first stage, then decreased when ts reached a certain value. According to this result,a model of relationship between L, thermal mismatch (Δαr) and K1c was built up. If a chemical reaction tookplace and a new phase was formed in the interface, the K1c. of composite was effected by the combination ofrs, chemical bonding, radial inter facial stress and other factors.
Nine kinds of glass-ceramic matrix composites with different compositions and inter facial strength(L) were prepared. The influence of Ti on the fracture toughness (K1c.) of composites was studied. It was discoved that, for the system no chemical reaction taking place at the interface, K1c. increased proportionallywith ts increasing at the first stage, then decreased when ts reached a certain value. According to this result,a model of relationship between L, thermal mismatch (Δαr) and K1c was built up. If a chemical reaction tookplace and a new phase was formed in the interface, the K1c. of composite was effected by the combination ofrs, chemical bonding, radial inter facial stress and other factors.
