Affordable Access

Publisher Website

Spatially varying microhardness in a platinum-modified nickel aluminide bond coat in a thermal barrier coating system

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
54
Issue
7
Identifiers
DOI: 10.1016/j.scriptamat.2005.12.034
Keywords
  • Coatings
  • Tem
  • Pvd
  • Microindentation
  • Nickel Base Alloy Bond Coats

Abstract

Abstract The hardness of a Pt-modified Ni aluminide bond coat and its ZrO 2 top coat in an electron beam-physical vapor deposition ZrO 2-based thermal barrier coating system has been studied as a function of temperature in as-deposited and aged (1200 °C/1 h) coupon samples, and in a used blade taken out of service after a (modest) fraction of life. A marked brittle to ductile transition at 580 ± 30 °C was observed in the as-deposited material, in agreement with previous uniaxial tensile data in this system. Significant spatial variation in the hardness of the bond coats were observed at room temperature and could be correlated with spatially varying microstructures.

There are no comments yet on this publication. Be the first to share your thoughts.