BONDING ZONE MORPHOLOGIES CHARACTERISTICS OF LASER REMELTED HA COATINGS

Diangang Wang, Chuanzhong Chen (), Quanhe Bao, Liang Zhang and Tingquan Lei
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Diangang Wang: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China
Chuanzhong Chen: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China
Quanhe Bao: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China
Liang Zhang: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China
Tingquan Lei: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China;

Surface Review and Letters (SRL), 2006, vol. 13, issue 05, 655-660

Abstract: The low bonding strength between plasma sprayed hydroxyapatite (HA) coatings and substrates is one of the problems, which should be solved. In this paper, the as-sprayed HA coatings were retreated by laser remelting. The microstructure and element analysis in coatings were studied by electron probe microanalyzer (EPMA) and the accessory of energy spectrum analyzer. The results show that the bonding state can be improved greatly after laser remelting and it is a metallurgical combination between transition layers and substrates. Generally, with the increase of laser power and the decrease of scanning speed, the bonding state between the surface and transition layer will be improved much more, but the value ofCa/Pratio will deviate much more from 1.67. In this experiment, the optimum technological parameter is that the laser power is 600 W and the scanning speed is 11.2 mm/s.

Keywords: Bonding state; plasma spraying; laser remelting; morphology (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X0600861X

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