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Article
Microstructure investigations of Pt-modified γ′-Ni3Al + γ-Ni coatings on Ni-based superalloys
Journal of Materials Research
  • Guanghui Cao, Shanghai University
  • Taoping Ou, Shanghai University
  • Hua Jiang, Shanghai University
  • Alan M. Russell, Iowa State University
Document Type
Article
Publication Date
1-1-2010
DOI
10.1557/JMR.2010.0148
Abstract

The microstructure of Pt-modified γ′-Ni3Al + γ-Ni coating on CMSX-4 single-crystal superalloy has been investigated by transmission electron microscopy (TEM). Cross-sectional TEM analyses showed the presence of precipitates in the coating. This precipitate was identified as the hexagonal topologically close-packed (TCP) μ phase with lattice parameters a = 0.473 nm and c = 2.565 nm. The energy-dispersive x-ray (EDX) spectrum of the μ phase suggested a refractory element rich compound comprising the elements Re, W, and Co. Twin domains parallel to (001) were found in the μ phase. The mechanisms of the μ phase and twinning formation were discussed.

Comments

This article is from Journal of Materials Research 25 (2010): 1191–1195, doi:10.1557/JMR.2010.0148. Posted with permission.

Copyright Owner
Materials Research Society
Language
en
Date Available
2014-01-19
File Format
application/pdf
Citation Information
Guanghui Cao, Taoping Ou, Hua Jiang and Alan M. Russell. "Microstructure investigations of Pt-modified γ′-Ni3Al + γ-Ni coatings on Ni-based superalloys" Journal of Materials Research Vol. 5 Iss. 6 (2010) p. 1191 - 1195
Available at: http://works.bepress.com/alan_russell/10/