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Calcium phosphate coating on magnesium alloy for modification of degradation behavior

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Abstract

Magnesium alloy has similar mechanical properties with natural bone, but its high susceptibility to corrosion has limited its application in orthopedics. In this study, a calcium phosphate coating is formed on magnesium alloy (AZ31) to control its degradation rate and enhance its bioactivity and bone inductivity. Samples of AZ31 plate were placed in the supersaturated calcification solution prepared with Ca(NO3)2, NaH2PO4 and NaHCO3, then the calcium phosphate coating formed. Through adjusting the immersion time, the thickness of uniform coatings can be changed from 10 to 20 μm. The composition, phase structure and morphology of the coatings were investigated. Bonding strength of the coatings and substrate was 2–4 MPa in this study. The coatings significantly decrease degradation rate of the original Mg alloy, indicating that the Mg alloy with calcium phosphate coating is a promising degradable bone material.

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Authors and Affiliations

  1. Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Fu-zhai Cui, Jing-xin Yang & Yan-peng Jiao

  2. Department of Orthopedics, General Hospital of Guangzhou Military Command of PLA, Guangzhou, 510010, China

    Qing-shui Yin & Yu Zhang

  3. Institute of Physics and Applied Physics, and Atomic-scale Surface Science Research Center, Yonsei University, Seoul, 120-749, Korea

    In-Seop Lee

Authors
  1. Fu-zhai Cui
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  2. Jing-xin Yang
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  3. Yan-peng Jiao
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  4. Qing-shui Yin
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  5. Yu Zhang
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  6. In-Seop Lee
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Correspondence to Fu-zhai Cui.

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Cui, Fz., Yang, Jx., Jiao, Yp. et al. Calcium phosphate coating on magnesium alloy for modification of degradation behavior. Front. Mater. Sci. China 2, 143–148 (2008). https://doi.org/10.1007/s11706-008-0024-6

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  • DOI: https://doi.org/10.1007/s11706-008-0024-6

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