Characterization of laser cladded Zr-Cu-Ni-Al in-situ metallic glass matrix composite coatings with enhanced corrosion-resistance
Characterization of laser cladded Zr-Cu-Ni-Al in-situ metallic glass matrix composite coatings with enhanced corrosion-resistance
复制标题
激光熔覆Zr-Cu-Ni-Al原位金属玻璃基复合涂层的增强耐腐蚀性能的表征
DOI：
10.1016/j.vacuum.2020.109996
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发表时间：
2021-03-01
期刊：
影响因子：
4
通讯作者：
Wang, Dou
中科院分区：
文献类型：
--
作者：
Hu, Liwei;Liu, Xue;Wang, Dou
激光熔覆为制备金属玻璃基复合材料（MGMC）涂层提供了一种强有力的方法，但其组织演变和涂层结构的详细表征仍需进一步研究。本文采用激光熔覆技术制备了Zr-Cu-Ni-Al多金属间化合物涂层。涂层由富Zr、Cu的枝晶和富Ni、Al的金属玻璃（MG）基体组成。研究了涂层的组织演变和耐蚀性。在MG基体的部分区域观察到了细小的晶化相，打破了传统的认为在SEM中没有反差的基体是完全非晶相的观点。制备的Zr-Cu-Ni-Al MGMC涂层具有明显的钝化现象，耐腐蚀性能提高。这项工作提供了一个新的见解MGMC涂层的微观结构。
Laser cladding provides a powerful method for the preparation of metallic glass matrix composite (MGMC) coatings, while the microstructure evolution and the detailed characterization of the coating structure still need further investigation. In the present work, Zr-Cu-Ni-Al MGMC coatings were prepared by laser cladding. The coatings are constituted by Zr&Cu enriched dendrites and Ni&Al enriched metallic glass (MG) matrix. The microstructure evolution and corrosion-resistance of the coatings were investigated. Fine crystalline phases were observed in partial area of the MG matrix, which breaks the conventional thought that the matrix with no contrast in SEM is of fully amorphous phase. The prepared Zr-Cu-Ni-Al MGMC coatings exhibit obvious passivation phenomena and enhanced corrosion-resistance. This work provides a novel insight into the microstructure of the MGMC coatings.