EFFECT OF METAL-OXIDE DIFFUSION BARRIER ON INTERDIFFUSION OF ELEMENTS BETWEEN COATING AND SUBSTRATE

摘要

The effect of LPPS Ni3Al-Y2O3 diffusion barrier layer on interdiffusion of elements betweencoating and substrate has been investigated.It was found that the retardation of interdiffusionis related to the amount of oxide in the diffusion barrier layer.The retardation is not remark-able when the content of Y2O3 is 8 wt-%,whereas the diffusion of Al,Co or Cr has all beennotably retarded when the content of Y2O3 reaches 30 wt-%.The retardation effect of diffu-sion barrier is different for different elements such as Al,Co or Cr.