TY - JOUR
T1 - Fabrication and microstructure of CaTiO 3 coating by laser cladding
AU - Lü, Xiaowei
AU - Lin, Xin
AU - Wu, Xiaoyu
AU - Hu, Jiang
AU - Gao, Bo
AU - Huang, Weidong
PY - 2011/12
Y1 - 2011/12
N2 - 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.
AB - 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.
KW - CaCO
KW - CaHPO
KW - CaTiO coating
KW - Laser cladding
KW - Ti substrate
UR - http://www.scopus.com/inward/record.url?scp=84861828815&partnerID=8YFLogxK
U2 - 10.1007/s11595-011-0369-z
DO - 10.1007/s11595-011-0369-z
M3 - 文章
AN - SCOPUS:84861828815
SN - 1000-2413
VL - 26
SP - 1093
EP - 1097
JO - Journal Wuhan University of Technology, Materials Science Edition
JF - Journal Wuhan University of Technology, Materials Science Edition
IS - 6
ER -