Microstructural evolution and corrosion resistance property of in-situ Zr–C(B, Si)/Ni–Zr reinforced composite coatings on zirconium alloy by laser cladding
In-situ reinforced coatings were prepared by laser cladding Ni60A + WC powder on R60702 zirconium. The microstructural evolution, microhardness, and corrosion resistance of in-situ reinforced composite coatings were analyzed. The reinforcements in the coatings were mainly composed of cross and fishb...
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| Format: | Article |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423017428 |
| _version_ | 1797646754960637952 |
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| author | Hao Wang Jie Li Kun Liu Guoxiang Xu Haiyang Zhu Juan Wang Cong Xu Lixiang Wang Artem Okulov |
| author_facet | Hao Wang Jie Li Kun Liu Guoxiang Xu Haiyang Zhu Juan Wang Cong Xu Lixiang Wang Artem Okulov |
| author_sort | Hao Wang |
| collection | DOAJ |
| description | In-situ reinforced coatings were prepared by laser cladding Ni60A + WC powder on R60702 zirconium. The microstructural evolution, microhardness, and corrosion resistance of in-situ reinforced composite coatings were analyzed. The reinforcements in the coatings were mainly composed of cross and fishbone-like α-Zr dendrites, block ZrC(B, Si)2, and slender needle-like NiZr. The results show that ZrC/ZrB2 reinforcements grew on the transition layer on the molten WC's surface, fell off, and connected. Some small particles acted as preferential nucleation points and preferentially grew into cross-shaped dendrites in the direction of greater supercooling. The cross-shaped dendrites were closely arranged in the direction of the main axis, and the axial growth rate was smaller than that of the side arms. During the growth process of the cross-shaped dendrites, Zr precipitated towards the side arms, forming α-Zr. Finally, the dendrites interconnected, forming fishbone-like reinforcements. As the laser power increased, the microhardness and corrosion resistance increased significantly. The microhardness (700 HV0.5) and corrosion resistance were highest when the laser power was 2.5 kW and the powder used was Ni60A + 25% WC. |
| first_indexed | 2024-03-11T15:07:20Z |
| format | Article |
| id | doaj.art-edb8c4427c5c4e6cba4962bfd2d404ae |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:07:20Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-edb8c4427c5c4e6cba4962bfd2d404ae2023-10-30T06:02:47ZengElsevierJournal of Materials Research and Technology2238-78542023-09-0126530541Microstructural evolution and corrosion resistance property of in-situ Zr–C(B, Si)/Ni–Zr reinforced composite coatings on zirconium alloy by laser claddingHao Wang0Jie Li1Kun Liu2Guoxiang Xu3Haiyang Zhu4Juan Wang5Cong Xu6Lixiang Wang7Artem Okulov8School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, China; Corresponding author.School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, ChinaSchool of Metallurgical and Materials Engineering, Suzhou Institute of Technology, Jiangsu University of Science and Technology, Suzhou, 215000, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, 250061, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, ChinaM.N. Mikheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences, Ekaterinburg, 620077, RussiaIn-situ reinforced coatings were prepared by laser cladding Ni60A + WC powder on R60702 zirconium. The microstructural evolution, microhardness, and corrosion resistance of in-situ reinforced composite coatings were analyzed. The reinforcements in the coatings were mainly composed of cross and fishbone-like α-Zr dendrites, block ZrC(B, Si)2, and slender needle-like NiZr. The results show that ZrC/ZrB2 reinforcements grew on the transition layer on the molten WC's surface, fell off, and connected. Some small particles acted as preferential nucleation points and preferentially grew into cross-shaped dendrites in the direction of greater supercooling. The cross-shaped dendrites were closely arranged in the direction of the main axis, and the axial growth rate was smaller than that of the side arms. During the growth process of the cross-shaped dendrites, Zr precipitated towards the side arms, forming α-Zr. Finally, the dendrites interconnected, forming fishbone-like reinforcements. As the laser power increased, the microhardness and corrosion resistance increased significantly. The microhardness (700 HV0.5) and corrosion resistance were highest when the laser power was 2.5 kW and the powder used was Ni60A + 25% WC.http://www.sciencedirect.com/science/article/pii/S2238785423017428ZirconiumLaser claddingIn-situ reinforcementsMicrostructural evolutionCorrosion resistance |
| spellingShingle | Hao Wang Jie Li Kun Liu Guoxiang Xu Haiyang Zhu Juan Wang Cong Xu Lixiang Wang Artem Okulov Microstructural evolution and corrosion resistance property of in-situ Zr–C(B, Si)/Ni–Zr reinforced composite coatings on zirconium alloy by laser cladding Journal of Materials Research and Technology Zirconium Laser cladding In-situ reinforcements Microstructural evolution Corrosion resistance |
| title | Microstructural evolution and corrosion resistance property of in-situ Zr–C(B, Si)/Ni–Zr reinforced composite coatings on zirconium alloy by laser cladding |
| title_full | Microstructural evolution and corrosion resistance property of in-situ Zr–C(B, Si)/Ni–Zr reinforced composite coatings on zirconium alloy by laser cladding |
| title_fullStr | Microstructural evolution and corrosion resistance property of in-situ Zr–C(B, Si)/Ni–Zr reinforced composite coatings on zirconium alloy by laser cladding |
| title_full_unstemmed | Microstructural evolution and corrosion resistance property of in-situ Zr–C(B, Si)/Ni–Zr reinforced composite coatings on zirconium alloy by laser cladding |
| title_short | Microstructural evolution and corrosion resistance property of in-situ Zr–C(B, Si)/Ni–Zr reinforced composite coatings on zirconium alloy by laser cladding |
| title_sort | microstructural evolution and corrosion resistance property of in situ zr c b si ni zr reinforced composite coatings on zirconium alloy by laser cladding |
| topic | Zirconium Laser cladding In-situ reinforcements Microstructural evolution Corrosion resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423017428 |
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