Dilution characteristics of ultrasonic assisted laser clad yttria-stabilized zirconia coating
Dilution characteristics of ultrasonic assisted laser clad yttria-stabilized zirconia coating
复制标题
超声辅助激光熔覆氧化钇稳定氧化锆涂层的稀释特性
DOI：
10.1016/j.matlet.2014.11.058
复制
发表时间：
2015-02-15
影响因子：
3
通讯作者：
Niu, Fangyong
中科院分区：
文献类型：
--
作者：
Wu, Dongjiang;Guo, Minhai;Niu, Fangyong
采用超声辅助激光熔覆技术制备了具有良好组织和性能的氧化钇稳定氧化锆（YSZ）涂层。研究了超声振动对合金组织演变和元素分布特征的影响。结果表明，超声振动在激光熔覆过程中的应用改变了熔覆层的横截面形貌，细化了熔覆层的组织。在超声振动作用下，无超声振动沉积的涂层中的台阶状元素转变变为近似线性的转变。此外，由于超声非线性效应引起的熔融基体与熔融填料粉末的完全混合，涂层与基体之间的稀释率增加。研究结果表明，超声振动可以同时控制涂层的微观结构和稀释特性，从而提高涂层与基体的结合强度。皇冠版权所有（C）2014由爱思唯尔B.V.出版保留所有权利。
Yttria-stabilized zirconia (YSZ) coatings with improved microstructures and properties were deposited using the novel ultrasonic assisted laser cladding technique. The effect of ultrasonic vibration on the evolution of microstructures and the element distribution characteristics was investigated. It was found that application of ultrasonic vibration in the laser cladding process changed the cross-sectional morphology of coatings, and the microstructures were refined. With the ultrasonic vibration, the stepped element transition within the coating deposited without ultrasonic vibration changed to a approximately linear transition. Additionally, the dilution rate between the coating and substrate increased due to the complete mixing of the molten substrate with the molten filler powders caused by the ultrasonic nonlinear effects. These findings indicate that the ultrasonic vibration could simultaneously control the microstructures and dilution characteristics of coatings to improve the coating bonding strength with the substrate. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.