Basic study on the modification of vacuum plasma sprayed tungsten coating by friction stir processing
| Project/Area Number |
26289360
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institutes for Quantum and Radiological Science and Technology (2016)
Japan Atomic Energy Agency (2014-2015) |
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Principal Investigator |
Tanigawa Hiroyasu 国立研究開発法人量子科学技術研究開発機構, 核融合エネルギー研究開発部門 核融合炉構造材料開発グループ, グループリーダー (50354668)
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| Co-Investigator(Kenkyū-buntansha) |
渡邊 誠 国立研究開発法人物質・材料研究機構, 先進高温材料ユニット, 主幹研究員 (00391219)
黒田 聖治 国立研究開発法人物質・材料研究機構, 先進高温材料ユニット, ユニット長 (50354220)
小沢 和巳 国立研究開発法人日本原子力研究開発機構, 核融合研究開発部門 六ケ所核融合研究所, 任期付研究員 (80613330)
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| Co-Investigator(Renkei-kenkyūsha) |
FUJII Hidetoshi 大阪大学, 接合科学研究所, 教授 (00247230)
MORISADA Yoshiaki 大阪大学, 接合科学研究所, 教授 (00416356)
ARAKI Hiroshi 物質・材料研究機構, 主幹エンジニア (90354349)
EZATO Kohichiro 量子科学技術研究開発機構, 核融合エネルギー研究開発部門, 上席研究員 (30354624)
SEKI Yoji 量子科学技術研究開発機構, 核融合エネルギー研究開発部門, 主幹研究員 (00469793)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2016: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2015: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2014: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
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| Keywords | 摩擦撹拌処理 / 耐熱皮膜 / タングステン / 真空溶射 / ウオームスプレー法 / 粉末床溶融結合法 / 繰り返し熱負荷試験 / 材料加工・処理 / プラズマ・核融合 / 構造・機能材料 / 金属物性 / 界面組織 / 熱負荷試験体 / 摩擦撹拌処理強化 / タングステン皮膜 / ウォームスプレー法 |
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| Outline of Final Research Achievements |
Tungsten (W) is the primary candidate material as a plasma facing material in fusion devices. The vacuum plasma spray (VPS) technique has been investigated, but the issues are its low thermal conducitivty and low strength of VPS-W mainly caused by the porous structure of VPS-W. In order to solve these issues, friction stir processing (FSP) was applied on VPS-W, and it was suggested that FSP can contribute to significant improvement both in mechanical and thermal properties of VPS-W coating. Hardness test over FSPed VPS-W layer revealed that the hardness of W becomes equivalent to or higher than that of bulk W. Thermal conductivity was about 80% of bulk W at 200°C, but it becomes equivalent to that of bulk W over 800°C. Warm Spray (WS) method and Selective Laser Melting (SLM) method have been examined as the potential new technique as the W coating, and it turned out that SLM can form a decent thickness of W coating, but with a larger porousness.
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Report
(4 results)
Research Products
(9 results)
