| Title |
Development of hydroxyapatite coatings by solution precursor plasma spray process and their microstructural characterization |
|
Authors |
Rolando T. Candidato Jr., Pawe脙聟脗聜 Soko脙聟脗聜owski, Lech Paw脙聟脗聜owski, Gisele Lecomte-Nana, Catalin Constantinescu and Alain Denoirjean |
|
Publication date |
2016/10/29 |
|
Journal |
Surface & Coatings Technology |
| Volume |
318 |
| Pages |
11 |
| Publisher |
Elsevier |
| Abstract |
Solution precursor plasma spraying (SPPS) is a promisingmethod of obtaining coatingswith unique microstructural
features. The present study reports about the development of hydroxyapatite (HA) coatings by SPPS using
water-based calcium-phosphate solution and about the analyses of their microstructure. X-ray diffraction (XRD)
analysis showed that HAwas the major crystal phase of the coatings, being present in the range from95% to 98%.
The coatings of greater HA content were obtained while spraying using shorter spray distance. The coating crystallinity
ranges from24% to 69% depending on the temperature at deposition. An increase of the temperature results
in greater crystallinity. The obtained coatings' microstructuresmay be described by dome-like surface and by
the columnar-like cross-section when using precursor with low concentration. The use of concentrated solution
precursor results in cauliflower-like structures composed of agglomerated fragmented shells and fine spherical
particles. The possible phenomena occurring in droplets in contact with the plasma jet and the coating buildup
mechanisms were tentatively explained. |
| Index terms / Keywords |
Hydroxyapatite coatings Solution precursor plasma spraying Crystallinity Percent purity Coating microstructures |
| DOI |
|
Mindanao State
University - Iligan Institute of Technology