2021 Fiscal Year Final Research Report
In-situ formation of ceramic protective coating on Mo-based composites by laser powder bed fusion
| Project/Area Number |
20K15036
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26030:Composite materials and interfaces-related
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| Research Institution | Tohoku University |
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Principal Investigator |
ZHOU Weiwei 東北大学, 工学研究科, 助教 (10800352)
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| Project Period (FY) |
2020-04-01 – 2022-03-31
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| Keywords | Laser powder bed fusion / Mo-based composites / Coatings / Oxidation resistance / Hetero-agglomeration / Microstructure |
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| Outline of Final Research Achievements |
In this study, a novel strategy was developed to prepare nanoceramic/metal mixed powders by using acid-treated carbon nanotubes (CNTs) during hetero-agglomeration process. After L-PBF, a tight ceramic coating was formed on the surface of the Mo-based alloy, which effectively increased the resistance to oxidation at high temperatures. Meanwhile, the TiC and Al2O3 nanoparticles were homogenously dispersed and closely contacted with the matrix, giving rise to an enhanced Vickers hardness. This work shed light on designing and producing high-performance Mo-based materials in ultrahigh-temperature applications.
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| Free Research Field |
材料加工
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| Academic Significance and Societal Importance of the Research Achievements |
The applicant proposes a facile and effective coating approach via L-PBF. The protective layer works against the harsh oxidation environment, contributing to the applications of Mo-based alloys.
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