2022 Fiscal Year Final Research Report
Elucidation of stress formation mechanism during deposition process of ceramic particles
| Project/Area Number |
20K04172
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 18010:Mechanics of materials and materials-related
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| Research Institution | Iwate University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
足立 寛太 岩手大学, 理工学部, 助教 (50823879)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 機械材料・材料力学 / 構造・機能材料 / 遮熱コーティング / 残留応力 / 弾性係数 |
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| Outline of Final Research Achievements |
Ceramic thermal sprayed coating is formed by sequential impact of semi-molten particles into the substrate with a plasma jet. In this study, we investigated the stress formation mechanism during the particle deposition process. Firstly, a stress analytical model, three-layer model with an intermediate layer, was constructed based on the curvature of the specimen. Secondly, by measuring the curvature history of the specimen during plasma spraying process, the deposition stress history during the particle deposition process was evaluated. Experimental studies under various process conditions clarified the transient state of the deposition stress, the relation between deposition stress and material properties, and the relation between deposition stress and the coating microstructure.
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| Free Research Field |
材料力学
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| Academic Significance and Societal Importance of the Research Achievements |
セラミックス皮膜はガスタービンなどの高温部品で不可欠であり，プラズマ溶射で施工されている．過酷的な粒子積層環境中において，セラミックス皮膜の応力履歴を正確に評価することが困難であり，残留応力の形成機構の解明が重要な課題となっている．本研究では粒子積層中の過渡的な堆積応力を実験的に評価し，応力形成機構を検討した貴重な結果である．特に，明らかにした堆積応力の物性依存や，堆積応力と皮膜組織との関連は，今後，応力制御セラミックス皮膜や組織制御セラミックス皮膜の開発に貢献するものである．
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