Ni/Ni_3Al-TiC系梯度功能材料的组成结构设计与制备

DESIGN AND FABRICATION OF Ni/Ni 3AlTiC FUNCTIONALLY GRADED MATERIALS

选择Ｎｉ／Ｎｉ３ＡｌＴｉＣ体系的ＦＧＭ，对其在制备过程中的残余热应力进行了计算机有限元模拟。在综合考虑热应力最小、热应力发生位置以及纯ＴｉＣ侧应力状态等因素的基础上，完成了ＦＧＭ的组成结构设计与优化，得到了组成分布指数Ｐ＝１．６的最佳设计结果。按此设计结果，采用热压烧结工艺，制备出完整的、无宏观缺陷的Ｎｉ／Ｎｉ３ＡｌＴｉＣ系ＦＧＭ样品。

Based on the thermal stress form of pure TiC side,the minimum stress and its occurrence location in the Ni/Ni 3AlTiC FGM,optimum design result( P =1 6)is achieved by analysing the result of the finite element simulation for the residual thermal stress.According to the design result,an integrated Ni/Ni 3AlTiC FGM sample with thermal stress relaxation is obtained via HP method.