摘要
研究了在ＺｒＯ２含量为１５ｗｔ％时，ＳｉＣ晶须含量对Ａｌ２Ｏ３／ＴｉＮ／ＺｒＯ２／ＳｉＣｗ复合材料的显微结构与力学性能的影响．当ＳｉＣｗ含量由１０ｗｔ％增加到３０ｗｔ％时，弯曲强度σｆ和断裂韧性ＫＩＣ最高可达１１３４ＭＰａ和１２．２６ＭＰａ·ｍ１２。用ＳＥＭ、ＴＥＭ观察分析了复合材料的表面抛光组织、断口形貌和微观结构。试验结果表明，复合材料强韧化机制主要为晶须拔出、相变增韧、裂纹偏转和晶须与基体界面解离。
Effects of SiCw contents on microstructures and mechanical properties of Al 2O 3/TiN/ZrO 2/SiCw composites are studied. As SiCw contents increase from 10wt% to 30wt%, the flexure strenght σ f and fracture toughness K IC of the composites are respectively up to 1134MPa and 12.26MPa.m 1/2 . The surface polished struture, fracture morphology and microstruture are observed and analysed with TEM and SEM. The experimental results and analyses show that the strengthening and toughening mechanisms of the composites are whisker pull out, tronsformation toughening. crack deflection and interface debonding.
出处
《山东科学》
CAS
1997年第1期31-34,共4页
Shandong Science
基金
山东省教委资助项目
