摘要
采用ＣＶＤ法合成ＳｉＣ－ＴｉＣ陶资，探讨了ＴｉＣ含量与断裂韧性之间的关系。结果表明，当ＴｉＣ体积含量为４０％时，断裂韧性高达７．０ＭＰａ·ｍ１／２韧化效应归功于闭合效应以及弯曲效应。断裂韧性与体积含量之间存在ＫＩＣ＝［（ＫＩＣ０）＋Ｂｖｉ］ ＫＩＣ０＝（１＋Ａ）ＫＩＣｍ关系。建立的韧化模型与实验结果相一致。
The effect of SiC ceramics containing 0%～100% TiC fabricated by CVD method on the Fracture toughness has been investigated.The composites exhibited superior fracture toughness,KIC compared to mololithic SiC and TiC.Especially KIC was as high as 7.0Mpam1/2 for 40.0 vo 1% TiC composite.The observed toughening could be attributed to the closure effect due to the residual stresses near the second phase particles and the deflection effect due to the curves of the crack propagation.For SiC-TiC composite:Aaccording to this,the influnce factors on toughening were investigated.
出处
《兵器材料科学与工程》
CSCD
北大核心
1996年第1期3-9,共7页
Ordnance Material Science and Engineering
关键词
陶瓷
韧化机制
闭合效应
弯曲效应
s:ceramics,toughening mechanism,closure effect,curve effect
