Abstract No.:	1600
Title:	Development of ceramic composite coatings with titania nano fibers
Authors:	Makoto Watanabe* / National Institute for Materials Science, Japan Pornthep Chivavibul / National Institute for Materials Science, JAPAN Masayuki Komatsu/ National Institute for Materials Science, JAPAN Seiji Kuroda/ National Institute for Materials Science, JAPAN
Abstract:	In recent years, nano alumina/titania ceramic composite coatings have been investigated and exhibited very attractive properties in several mechanical applications such as wear resistance. One of the reasons for significant improvement of those coatings properties is considered to be ?nanostructure? preserved in the coating during depositions. Thus, it is of interest to introduce various nanostructure into coatings and to investigate the effects on the coating properties. In this study, alumina/titania composite powders were fabricated by spray dry procedure, which consist the alumina nano particle (~50nm) and the titania nano fibers (diameter 100~200nm, length 2~3m). The developed powders were sprayed by APS and HVOF process. The deposited coatings contain fibrous titania structure which was not melted during deposition. Vickers hardness, fracture resistance, and wear properties were evaluated for coatings fabricated under various conditions and corresponded to the microstructure.

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