An investigation, employing edge-on transmission electron microscopy, of the microstructure of aluminide diffusion coatings on a single crystal y' strengthened nickel base super alloy is reported. An examination has been made of the effect of postcoating exposure at 1100°C on the stability of the coating matrix, a B2 type phase, nominally NiAl. Precipitation in the coating is considered with respect to both decomposition of the B2 matrix to other Ni-Al (plus titanium) phases and the formation of chromium bearing precipitates. A comparison is drawn with behaviour at lower temperatures (850-950°C). © 1995 The Institute of Materials.
|Number of pages||6|
|Journal||Materials Science and Technology|
|Publication status||Published - Sep 1993|
- aluminide coating
- aluminide diffusion coatings
- high-temperature exposure
- microstructural degradation
- single crystal nickel based superalloy
- crystal microstructure
- diffusion coatings
- single crystals
- transmission electron microscopy
- nickel coatings
Gale, W. F., & King, J. E. (1993). Microstructural degradation of aluminide coatings on single crystal nickel based superalloys during high temperature exposure. Materials Science and Technology, 9(9), 793-798.