Influence of substrate temperature on structure and adhesion strength of Fe-Cr-P-C amorphous coating films produced by thermal spraying technique

Masahiro Komaki, Tsunehiro Mimura, Ryurou Kurahasi, Hirotaka Odahara, Kenji Amiya, Yasunori Saotome, Tohru Yamasaki

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The influence of the substrate temperature on the structure, the pore distribution, and the adhesion strength of Fe-10Cr-based amorphous coating films has been examined. The amorphous coating films have been produced by a thermal spraying technique using our developed cylindrical nozzle on SS400 substrates. The splat morphology of the sprayed particles changed drastically from an irregular splash shape to a disk shape at a transition temperature of about 325°C. When the substrate temperature increased to the transition temperature region, between 325 and 350°C, the porosity in the boundary regions between the sprayed coating films and the substrates drastically decreased to about 6%, which may be due to the drastic increase in the wettability of the sprayed particles accompanied with the change of morphology from the splashed shape to the disk shape. When the substrate temperature increased from the transition temperature of 325°C up to 400°C, the porosity decreased gradually, and the volume fraction of the amorphous phase increased with increasing substrate temperature, resulting in an increase in the adhesion strength up to about 15 MPa.

Original languageEnglish
Pages (from-to)681-689
Number of pages9
JournalMaterials Transactions
Volume53
Issue number4
DOIs
Publication statusPublished - 2012

Keywords

  • Adhesion strength
  • Amorphous alloy
  • Iron-chromium-phosphorus-carbon
  • Sprayed coating film
  • Substrate temperature
  • Thermal spraying method

ASJC Scopus subject areas

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

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