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5116 |
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Tuesday, May 10, 2016, Room 3C + 3D 11:50 AM Ceramic Coatings I |
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Flame-sprayed Y2O3 films having thermal-shock resistance with metal_EDTA complexes
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Keiji Komatsu / Nagaoka University of Technology, JAPAN Ayumu Toyama / Nagaoka University of Technology, JAPAN Tetsuo Sekiya/ Nagaoka University of Technology, JAPAN Tomoyuki Shirai/ Nagaoka University of Technology, JAPAN Atsushi Nakamura/ Chubu Chelest, Nagaoka University of Technology, JAPAN Ikumi Toda/ Nagaoka University of Technology, JAPAN Shigeo Ohshio/ Nagaoka University of Technology, JAPAN Hiroyuki Muramatsu/ Nagaoka University of Technology, JAPAN Hidetoshi Saitoh*/ Nagaoka University of Technology, JAPAN |
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In this study, yttrium oxide (Y2O3) films with high thermal-shock resistance were synthesized from a metalethylenediaminetetraacetic (metal_EDTA) complex by employing a H2-O2 combustion flame. A rotation apparatus and various cooling agents (compressed air, liquid nitrogen, and atomized purified-water) were used during the synthesis to control the thermal history during film deposition. An EDTA"Y"H complex was prepared and used as the staring material for the synthesis of Y2O3 films with a flame-spraying apparatus. Although thermally extreme environments were employed during the synthesis, all of the obtained Y2O3 films showed only a few cracks and minor peeling in their microstructures. For instance, the Y2O3 film synthesized using the rotation apparatus with water atomization units exhibited a porosity of 22.8%. The maximum film temperature immediately after deposition was 453°C owing to the high heat of evaporation of water. |