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| Abstract No.: |
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Scheduled at:
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Tuesday, May 10, 2016, Room 3C + 3D 2:20 PM
Ceramics Coating II
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| Title: |
Transition mechanism in flattening of plasma sprayed ceramic particles
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| Authors: |
Masahiro Fukumoto* / Toyohashi University of Technology, Japan
Natsuki Maeda/ Toyohashi University of Technology, Japan
Boyi Wei/ Toyohashi University of Technology, Japan
Daiki Suzuki/ Toyohashi University of Technology, Japan
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| Abstract: |
Transition in flattening behavior of thermally sprayed metallic materials has been recognized in our previous systematic investigations. A hypothesis, ultra-rapid cooled chill structure may play an essential role for generation of disk splat, has been proposed. Universality of this hypothesis beyond material difference was verified experimantally by using several kinds of ceramic materials having different thermal properties. To perform this, Al2O3, Y2O3 and YSZ particles were plasma sprayed onto AISI304 stainless steel substrate, and fraction of disk splat with substrate temperature increase was investigated, followed by the observation on cross-section microstructure of the splat. Unique amorphous and chill structure was observed in Al2O3 and Y2O3 splat, while only normal columnar structure was recognized in YSZ splat. As a result, the hypothesis was verified partially regardless of the materials difference.
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