采用自蔓延高温合成离心熔铸工艺可以快速制备出TiB2基陶瓷-42CrMo合金钢层状复合材料,并在层间界面上形成TiB2基陶瓷/Fe-Ni合金相三维网络跨尺度连续梯度复合结构,使层状复合材料分为陶瓷基体、中间过渡区与合金钢基底3层结构.通过材料力学性能测试并结合FESEM、HRTEM观察,得出正是由于层间界面上原位生成TiB2基陶瓷/Fe-Ni合金的三维网络跨尺度连续梯度复合结构,使复合材料不仅具有高的弯曲强度与断裂韧性,而且又使之在三点弯曲测试时呈现出明显的“假塑性”力学行为特征.同时,陶瓷基体附近界面上TiB2基陶瓷/Fe-Ni基合金复合结构裂纹互锁效应与中间过渡区上TiB2微纳米/纳米晶沉淀强化机制的协同作用又使TiB2基陶瓷-42CrMo合金钢层状复合材料具有高的层间界面剪切强度.
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