摘要
本工作采用热压工艺，以Ｙ＿２Ｏ＿３为烧结添加剂，在１８５０℃下制备ＴｉＣ＿ｐ－ＡＩＮ复合材料。结果表明：复合材料的密度、抗折强度、断裂韧性受第二相ＴｉＣ＿ｐ的影响，通过合理工艺因素选择，可以使复合材料的抗折强度和断裂韧性比基体ＡＩＮ材料分别提高４０％，８０％，达到４３８ＭＰａ，５．５９ＭＰａ·ｍ￣（１／２）。由ＸＲＤ内应力分析和ＴＥＭ显微结构测试结果可知，复合材料性能改善原因在于高弹性用量的ＴｉＣ引入以及ＡＩＮ和ＴｉＣ热膨胀系数不匹配导致的残余内应力。
TiC_p-AIN composites were prepared by hot-press process at 1850℃ with the addition of Y_2O_3.The effects of TiC particle content on the bending strength and fracture toughness were studied and the relation-ship between the properties and the microstructure of TiC_p-AIN composites were investigated.The results showthat the addition of TiC particles reduces the growth of AIN grains,and the crack deflection and microcrackcaused by the residual stress in result of the difference in thermal expansion coefficient of TiC and AIN are themain reason responsible for the increase of toughness.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1995年第4期379-384,共6页
Journal of The Chinese Ceramic Society
关键词
碳化钛
氮化铝
复合材料
残余应力
复合陶瓷
titanium carbide,aluminum nitride,composite,residual stress,toughening mechanism
