CaB<sub>6</sub>对激光熔覆生物陶瓷涂层组织和生物学性能的影响

doi:10.11896/cldb.19100044

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Abstract To improve the implantation stability and biological activity of the hydroxyapatite (HA) coating on the surface of medical titanium alloy, a boron-containing CaP bioceramic coating was prepared by laser cladding method. XRD, SEM, electrochemical etching and in SBF immersion experiments were used to characterize the phase composition, microstructure, corrosion resistance and bioactivity of the coating.The results show that the phase B₂O₃ and CaB₂O₄ are produced in the cladding layer after the addition of CaB₆.CaB₆exacerbates the decomposition of HA, and the central tissue of the cladding layer presents an ordered distribution of secondary dendrites. After adding CaB₆, the corrosion potential decreased by 294.46 mV, and the current density was 4.28 times that of CaB₆. In the vitro SBF immersion experiment, after adding CaB₆, the apatite deposited on the surface of the coating is uniformly distributed.After seven days of immersion, the formation of mineralized apatite is the largest, and the coating exhibits strong mineralization.The addition of CaB₆ can refine the grains,significantly improve the corrosion resistance of bioceramic coatings, and strengthen the surface mineralization ability of the coating.

Key words： laser cladding calcium hexaboride(CaB₆) bioceramic coating corrosion resistance bioactivity

Published: 26 April 2020

CLC number:

TG178

Fund:This work was suported by the Hunan Natural Science Foundation (2015JJ3109) and Hunan Provincial Department of Education Scientific Research Project (16C1375).

Corresponding Authors: Weihua Zhu, associate professor, master of science. He graduated from Hunan Normal University with a major in physics. During his master's degree in semiconductor physics at Beijing Normal University, he was mainly engaged in the research of preparation of GaPN solid solution blue semiconductor materials. His current research interests are: circuits and systems; embedded systems and applied research. In recent years, he has completed one project of the Provincial Department of Education, presided over the completion of one project of the Provincial Science and Technology Department, and completed four provincial-level projects and published more than 30 research papers. There are 8 core journals. In 2006, he was employed as a master instructor of physical electronics at the School of Electrical Engineering, Nanhua University.
Xinlin Wang, male, born in May 1970, Ph.D., professor. The academic leader of Nanhua University, the main academic leader of provincial key disciplines, and the dean of the School of Electrical Engineering of Nanhua University. He graduated from Huazhong University of Science and Technology with a bachelor's degree in optoelectronic technology, and obtained a master's degree in optical engineering from the National University of Defense Technology. He received his Ph.D. degree in electrical science and technology from the Wuhan Optoelectronics National Laboratory of Huazhong University of Science and Technology. At present, the main academic research direction: basic theory and numerical simulation of high-power laser, ultra-fast laser and matter interaction; surface plasmon optics; intelligent laser processing system and laser advanced manufacturing technology. He is responsible for the teaching of many undergraduate and postgraduate courses in optical fiber communication technology and quantum electronics. He presided over and undertook 18 scientific research projects such as the Provincial Natural Science Fund, the Nuclear Industry Fund, the Military Products Supporting Project, the National Natural Science Foundation and the 973 Project, and the third prize of the Ministry of Science and Technology Progress, and the second-class scientific and technological progress of the municipal government. 1 award, 2 invention patents; more than 70 academic papers published in domestic and foreign academic journals such as Optics Letters, Optics Express, Physical Review A, Applied Physics A, Journal of Micromechanics and Microengineering, Materials Letters, and China Laser. Among them, SCI contains nearly 30 articles, and EI contains more than 30 articles.

About author:: Jiaxin Shi, from September 2017 to present, he has studied at the School of Mechanical Engineering of Nanhua University, focusing on the research of laser processing.

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	SHI Jiaxin
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Cite this article:

SHI Jiaxin,ZHU Weihua,ZHU Hongmei, et al. Effect of CaB₆ on Microstructure and Biological Properties of Bioceramic Coatings by Laser Cladding[J]. Materials Reports, 2020, 34(10): 10030-10034.

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http://www.mater-rep.com/EN/10.11896/cldb.19100044 OR http://www.mater-rep.com/EN/Y2020/V34/I10/10030

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