【摘要】 采用ＴＺＰ相变和ＴｉＣ颗粒共同增韧Ａｌ２Ｏ３，使ＴＺＰ／ＴｉＣ／Ａｌ２Ｏ３复合材料的抗弯强度σｆ和断裂韧度ＫＩＣ分别达到１１０６ＭＰａ和１１．８６ＭＰａｍ１／２。探讨了复合材料在用作螺旋丝拉拔模具时的磨损和破损行为，研究了ＴＺＰ和ＴｉＣ对模具磨损和破损性能的影响。当ＴｉＣ含量一定时，随ＴＺＰ含量增加，模具的耐磨损和抗破损性能得到明显改善，可以认为应力诱发ＴＺＰ相变、裂纹偏转与桥联、残余应力等增韧机制为减磨和抗破损机制。更多还原

【Abstract】 The Al 2O 3 matrix is toughened by TZP transformation and TiC particle dispersed,its flexure strength σ f and fracture toughhess K IC are up to 1106 MPa and 11 86 MPa·m 1/2 respectively.It is successfully employed in spiral grooved wire cold drawing die.The wear and damage behaviour of the drawing die and the influences of TZP transformation and TiC particles on wear and damage resistence are studied.The result show that the wear and damage resistence are greatly improved due to the transformation,crack deflection and bridging,residual stress.更多还原