The Biocompatibility and Bioactivity of Gradient Composite Bioceramic Coating with Different Content of Nd₂O₃ Fabricated by Wide Band Laser Cladding

Abstract:

To eliminate thermal stress during laser cladding and to raise the bonding strength between substrate and coating, composition gradient coatings are designed and fabricated by using wide-band laser cladding technique on a Ti alloy. The rare earth Nd₂O₃ was added to improve the properties of the bioceramic coating. The experimental results indicate that when the adding of Nd₂O₃ reaches 0.6wt%, the characteristic peaks of HA and β-TCP are the highest, which demonstrates the amount of HA and β-TCP is the largest. However, when the content of Nd₂O₃ is up to 0.8wt%, the peaks of HA and β-TCP conversely goes down. The biocompatibility and bioactivity are related to the amount of HA and β-TCP catalyzed by Nd₂O₃. When the content of Nd₂O₃ is 0.6wt%, the number of cells proliferated and the ALP secreted on coatings is the most, which indicate the biocompatibility and bioactivity of gradient bioceramic coating is the best.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 1837-1840
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.1837
• Online since: December 2011
• Authors: Ming Xiao, Qi Bin Liu, Yi Zhi Zhu
• Keywords: Bioceramic Coating, Laser Cladding, Rare Earth Nd₂O₃

References

[1] Yao-ting Yu, Xing-dong Zhang. Biomaterials [M].Tianjin University Press, 2000.

[2] Klein C, de Groot K, Chery W, et al.. Biomaterials, 1994, 15(1)：31-34.

[3] Yaping Zhang, Jiacheng Gao, Jing Wen et al .Chinese Journal of Biomedical Engineering,2002,21(3):242~245.

[4] Q B Liu, J L Zou, M Zheng..Journal of RareEarth,2005,23(4):446-450.

[5] Andreas Dietz, Andreas Boehm, et al. European Archives of Oto-Rhino-Laryngology, 2010, Volume 267, Number 4, Pages 483-494