The Microstructure of Gradient Composite Bioceramic Coating with Single and Multiple Rare Earth Oxide Fabricated by Wide Band Laser Cladding

Abstract:

To improve bonding strength between Ti alloy and bioceramic coating and to eliminate thermal stress during laser cladding, gradient bioceramic coating materials is designed. The bioceramic coating is fabricated by wide band laser cladding technique. And the effect of adding single and multiple rare earth oxide on microstructure is investigated. The samples are soaked with SBF for 14 days, the experimental results indicate that when the content of single rare earth oxide is 0.6wt.%Y₂O₃, a large number of bioactivity phase and chrysanthemum shape microstructure can be observed. When the content of single rare earth oxide is 0.2wt.%Sm₂O₃, a lot of bioactivity phase and coral reef shape microstructure can be observed. When the content of multiple rare earth oxide is 0.3wt.%Sm₂O₃ and 0.4wt.%Y₂O₃, a large amount of bioactivity phase and more homogeneous and dense spherical particles can be observed on coating, which demonstrates the microstructure is of better bioactivity.

• Periodical: Applied Mechanics and Materials (Volumes 341-342)
• Pages: 171-174
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.341-342.171
• Online since: July 2013
• Authors: Ling Yan Zhang, Qi Bin Liu, Pei Ze Jiang, Zheng Zhang
• Keywords: Bioceramic Coating, Laser Cladding, Rare Earth Oxide Sm₂O₃, Rare Earth Oxide Y₂O₃

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