Study of phase transformations in heat treatment of HVOF thermally sprayed WC-17Co coating

Sh Khameneh Asl, M. Heydarzadeh Sohi, K. Hokamoto, M. Matsuda, R. Tomoshige, M. Nishida

研究成果: Contribution to journalConference article査読

6 被引用数 (Scopus)

抄録

In this work, WC-17Co powder was thermally sprayed onto mild steel using HVOF spray technique. The coated specimen was heat treated at 1100°C in a vacuum chamber and was then studied by using transmission electron microscopy (TEM). Post heat treatment resulted in recrystallization of the amorphous phase, formed during thermal spraying, into low carbon eta phase like Co 6W6C TEM results of the heat treated specimens showed that these new nucleated eta phases had very clear crystallographic structure without any crystalline defects. Heat treatment could also transform high carbon carbides like WC and W2C in the as sprayed samples to high carbon eta phases like Co3W3C. High density of dislocations and staking faults noticed in TEM of these phases might be an indication of possible shear mechanism in formation of these carbides.

本文言語英語
ページ(範囲)161-166
ページ数6
ジャーナルMaterials Science Forum
566
出版ステータス出版済み - 1 29 2008
外部発表はい
イベント2nd International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena, ESHP-2 - Kumamoto, 日本
継続期間: 3 6 20073 9 2007

All Science Journal Classification (ASJC) codes

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

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