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| Abstract No.: |
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| Title: |
Introduction of micro resin fragments with ceramic nano-particles into plasma flame to create fine coated layers
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| Authors: |
Soshu Kirihara / Osaka University, Japan
Makoto Katsuki* / Hitachi Zosen Corporation, Japan
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| Abstract: |
Nanoparticles thermal spraying has been developed to create fine ceramic layers with higher deposition speed. Micro resin fragments including with the ceramic nanoparticles could be introduced into argon gas plasma successfully by using conventional powder feeding equipment. Zirconia nanoparticles of 200 nm in average diameter were dispersed into a thermosetting acrylic resin at 40 - 50 % in volume fraction. An airtight container of 150 cc in volume was revolved and rotated for degassing and mixing. Obtained pastes were solidified thorough heating at 150 ºC for 30 min. Composite bulks were crushed by a vibrating milling machine. The micro fragments selected by using a sieve of 45 - 100 µm in mesh size. In the plasma flame, these resin fragments were burned down, and the heated nanoparticles were deposited on a metal substrate. Fine zirconia layers without micro cracks or pores were observed by scanning electron microscopy. Carbon contamination deriving from the resin material was verified by X-ray diffraction analysis for the cross section of coated layer. Vickers hardness of the ceramic phase was measured to estimate the sintered density. The fine zirconia coating will increase practical durability as heat and corrosion resistances of steam pipes in a boiler of thermal power generators inner walls of refuse incinerators
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