Life Assessment of Gas Turbine Bucket Coating Based on Degradation Analysis

Yomei Yoshioka, Daizo Saito, Itaru Murakami, Kazunori Fujiyama, Nagatoshi Okabe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The integrity of coating can exert a major influence on the first-stage bucket life of gas turbines. This paper clarifies the role of coating and then describes the degradation mechanisms of Platinum-modified aluminide diffusion coating and vacuum plasma sprayed Co-Cr-Al-Y coating based on the investigated results of macro- and micro-structural degradation behaviors for the buckets exposed in service for 11000 and 25000 hours. The life exhaustion concept of the first-stage bucket with that of the coating are also described.

Original languageEnglish
Pages (from-to)1724-1728
Number of pages5
JournalJournal of the Society of Materials Science, Japan
Volume41
Issue number471
DOIs
Publication statusPublished - 1992 Dec
Externally publishedYes

Keywords

  • Breaching
  • Bucket
  • Co-Cr-Al-Y
  • Gas turbine
  • Pt-Al coating
  • VPS

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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