Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
권호 표지

Fabrication of $Ti(Al,\;O)-Al_2O_3$ Powder Feedstock for Thermal Spraying and Evaluation of the Composite Coating

  • Cao, Peng (Department of Materials and Process Engineering, the University of Waikato) ;
  • Gabbitas, Brian (Department of Materials and Process Engineering, the University of Waikato) ;
  • Zheng, Ling (Department of Materials and Process Engineering, the University of Waikato) ;
  • Zhang, Deliang (Department of Materials and Process Engineering, the University of Waikato)
  • Published : 2006.09.24
Download PDF
⟨ Previous Next ⟩

Abstract

[ $Ti(Al,\;O)-Al_2O_3$ ] composite powders were produced by high energy mechanical milling of a mixture of Al and $TiO_2$ powders followed by a combustion reaction. The powders were subsequently thermally sprayed on H13 steel substrates. Microstructural examination was conducted on the composite powders and thermally sprayed coatings, using X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The performance of the coatings was evaluated in terms of micro-hardness and thermal fatigue. The thermally sprayed coatings performed very well in the preliminary thermal fatigue tests and showed no wetting tendency to molten aluminum.

Keywords