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The Influence of Long-Term Heat Treatment on Microstructure of Zr-Modified Aluminide Coating Deposited by CVD Method on MAR M200+Hf Nickel Superalloy
- Source :
- Key Engineering Materials; November 2013, Vol. 592 Issue: 1 p469-472, 4p
- Publication Year :
- 2013
-
Abstract
- The article presents the investigation of influence of long-term annealing of Zr modified aluminide coatings on its microstructure. The coatings were deposited by Chemical Vapour Deposition on MAR M200+Hf nickel superalloy. Annealing was carried out in a vacuum furnace at the temperature 1020<superscript>o</superscript>C within the period of 12, 16 and 20 hours respectively. The microstructral analysis was carried out using Hitachi S-3400 scanning electron microscope. Phase changes in the aluminide layer were observed, particularly the NiAl phase into Ni<subscript>3</subscript>Al. Changes in thickness of individual layers in the coating were observed. Conducted research showed that there is no influence of Zr on structure of the aluminide coating during annealing. The structure changes are similar to observed in simple aluminide coating. The maximum time of heat treatment without significant influence on structure of aluminide coating is 16 hours. After that time the main component of coating is NiAl phase.
Details
- Language :
- English
- ISSN :
- 10139826 and 16629795
- Volume :
- 592
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Key Engineering Materials
- Publication Type :
- Periodical
- Accession number :
- ejs31714441
- Full Text :
- https://doi.org/10.4028/www.scientific.net/KEM.592-593.469