Fabrication and microstructure of CaTiO 3 coating by laser cladding

Xiaowei Lü, Xin Lin, Xiaoyu Wu, Jiang Hu, Bo Gao, Weidong Huang

科研成果: 期刊稿件文章同行评审

1 引用 (Scopus)

摘要

In order to explore the way to improve the adhesion of the calcium phosphate bioceramic coating to Ti substrate, the CaTiO 3 coating was fabricated on Ti substrate by laser cladding (LC) using powders of CaCO and CaHPO 4 and then the composition and microstructure of the coatings were investigated. During LC, CaCO 3 can hardly react with Ti, and the coating fabricated using CaCO 3 powder is mainly composed of the process of CaO, the decomposition product of CaCO 3. Moreover, the coating has a loosened structure and part of it has peeled off from the substrate. CaHPO 4 reacts vigorously with Ti, and the coating fabricated using CaHPO 4 mainly consists of CaTiO 3 which is one of the reaction products between Ti and CaHPO 4. Chemical bonding is formed at the interface between coating and substrate, which may enhance the adhesion of the CaTiO 3 coating to Ti substrate. Furthermore, CaTiO 3 dendrite and eutectic of CaTiO 3 and Ca 2P 2O 7 are found on the surface of the coating, implying that a transition can be formed between CaTiO 3 and some calcium phosphate bioceramic. So CaTiO 3 coating fabricated using CaHPO 4 can be a potential candidate to improve the adhesion between calcium phosphate coating and Ti substrate. However, there are also pores and cracks existing in the coating, which may degrade the mechanical properties of the coating.

源语言英语
页(从-至)1093-1097
页数5
期刊Journal Wuhan University of Technology, Materials Science Edition
26
6
DOI
出版状态已出版 - 12月 2011

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