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Epitaxial deposition of MCrAlY coatings on a Ni-base superalloy by laser cladding

Authors
Publisher
Elsevier Ltd
Publication Date
Volume
49
Issue
7
Identifiers
DOI: 10.1016/s1359-6462(03)00369-5
Keywords
  • Laser Deposition
  • Single Crystal Growth
  • Nickel Alloys
  • Epitaxy

Abstract

Abstract Single-crystal oxidation resistant coatings (MCrAlY alloys) have been deposited onto a single-crystal Ni-base superalloy by laser cladding. The influence of the primary solidification phase (γ-Ni, γ ′-Ni 3Al or β-NiAl) on epitaxial or non-epitaxial growth is analysed. It is shown that epitaxial growth is only obtained when the primary phase to solidify is γ.

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