Effects of Al Content and Addition of Third Element on Fabrication of Ti-Al Intermetallic Coatings by Heat Treatment of Warm-Sprayed Precursors

J. Sienkiewicz*, S. Kuroda, K. Minagawa, Hideyuki Murakami, H. Araki, K. J. Kurzydłowski

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Four powder mixtures of titanium and aluminum with 50:50, 40:60, 30:70, and 20:80 atomic ratios were used as feedstock for Warm Spray process to produce composite coatings. A two-stage heat treatment at 600 and 1000 °C was applied to the deposits in order to obtain titanium aluminide intermetallic phases. The microstructure, chemical, and phase composition of the as-deposited and heat-treated coatings were investigated using SEM, EDS, and XRD. It was found that the Al content affects on the thickness expansion of the heat-treated Ti-Al coatings significantly and also has a major influence on the porosity development, which is caused by the Kirkendall effect. The effects of adding a third element Si and heat treatment with pressure to produce denser Ti-Al intermetallic coating were also examined. The investigated hot-pressed coatings with addition of Si exhibited much denser microstructure and contained Ti-Al intermetallic phases with titanium silicide precipitates.

本文言語English
ページ(範囲)749-757
ページ数9
ジャーナルJournal of Thermal Spray Technology
24
5
DOI
出版ステータスPublished - 2015 6 28
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 材料化学

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