Microstructual Characterization of Sputtered Pt–Ir Coatings on Ni-Base Single Crystal Superalloy

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  • Suzuki Aya
    Thermal Spray Group, Materials Engineering Laboratory, National Institute for Materials Science
  • Harada Masanori
    Undergraduate Student, Department of Materials Engineering, Graduate School of Engineering, the University of Tokyo
  • Wu Yingna
    Thermal Spray Group, Materials Engineering Laboratory, National Institute for Materials Science
  • Murakami Hideyuki
    Thermal Spray Group, Materials Engineering Laboratory, National Institute for Materials Science

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  • Microstructual Characterization of Sputtered Pt–Ir Coatings on Ni-Base Single Crystal Superalloy

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Description

Characterization of Pt–Ir alloy coatings on a Ni-base single crystal superalloy was carried out. Pt–Ir alloys with varied composition were sputter-deposited on TMS-82+, which were then subjected to annealing and Al-pack cementation treatments. It was found that all the as-deposited films consisted of Pt–Ir solid solutioned fcc single phase, while the annealing treatment at 1423 K for 1 h drastically changed the microstructure, depending on the composition of coated layers. On the other hand, concentration profiles of alloying elements were not drastically changed by the Al-pack cementation process. It was also revealed that Ir addition increases the surface hardness of all the as-deposited, annealed, and aluminized specimens.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 46 (8), 1760-1763, 2005

    The Japan Institute of Metals and Materials

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