TiC 的高温塑性变形及其对TiC/Ni<sub>3</sub>Al 梯度材料循环耐热冲击损伤的影响

TiC 的高温塑性变形及其对TiC/Ni₃Al 梯度材料循环耐热冲击损伤的影响

摘要: 实验测量了TiC 烧结体的高温塑性变形行为, 讨论了掺入Cr₃C₂ 对TiC 高温塑性变形的影响, 结合TiC/Ni₃A l 梯度材料的循环热冲击特性得出: TiC/Ni₃A l 梯度材料有效热导率随循环次数增加呈下降趋势与TiC 的塑性变形行为密切相关, TiC 表面的纵向裂纹是由巨大的径向压应力引起的。

Abstract: The high temperature ductile deformation behavior of TiC sintered body with various content of Cr₃C₂ addition was investigated. The results show that the descending trend of the effective conductivity of TiC/Ni₃Al FGMs with the numbers of shock cycles relates closely to the ductile deformation behavior of TiC, and the vertical cracks appearing on the TiC surface is caused by large radial compressive stresses.