Properties of Al₂O₃-TiO₂ Coating Prepared by Plasma Spraying with an Internally-Fed Powder System

Abstract:

Alumina-titania (60: 40 by weight) coatings were prepared by low power plasma thermal spraying with two types of plasma spray systems: internally-fed and externally-fed powder system. The coatings were investigated by many techniques, respectively X-ray diffraction (XRD), scanning electron microscopy (SEM) and micro-hardness tester. It was found that the thickness of coatings by low power plasma spray with an internally-fed powder system is higher than that of the coatings with an externally-fed powder system. The internally-fed powder system not only decreases the loss of powder but also increases the deposition efficiency for more than 80%. To better qualify the characteristics of these coatings prepared from spray-dried powders, microhardness was also studied.

• Periodical: Key Engineering Materials (Volumes 368-372)
• Pages: 1274-1276
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.368-372.1274
• Online since: February 2008
• Authors: Feng Zhou, Ying Qing Fu, Yang Gao
• Keywords: Alumina Titania, Internally-Fed Powder System, Plasma Spraying

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