
Proceedings Paper
Bioceramic coating of hydroxyapatite fabricated on Ti-6Al-4V with Nd-YAG laserFormat | Member Price | Non-Member Price |
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Paper Abstract
This paper presents on the direct laser melted hydroxyapatite coatings achieved by melting the pre-placed powder beds
using Nd-YAG laser. The process development and optimized parameters are reported. The results show that by
changing the laser power and the beam inclined plane it is possible that a desirable coating of HAP that is rich on the
surface can be produced. The microstructures of the coatings showed balling and cracking at beam angles between 0-15°
and at 27° a successful coating was achieved with laser power and scanning speed of 750W and 5mm/s respectively. The
said coating was pore and crack free while it retained non-decomposed HAP crystallites on the surface (mixed). The
microstructure of the transition layer concluded a moderate temperature process since the formed dendrites did not
develop or form secondary arms. The Ca/P conducted on the coating using EDS concluded Ca/P ratio of 8.04 and the
absence of titanium phosphates phase (TiP2). TiP2 is typically associated with the decomposition of HAP and indicate the
presence of high processing temperatures. Even so, the current results indicated that the investigated process was
successful in depositing HAP coating with desirable microstructures even though its bio-corrosion properties still need to
be ascertained before it could be qualified as suitable for biomedical applications.
Paper Details
Date Published: 9 March 2015
PDF: 7 pages
Proc. SPIE 9356, High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications IV, 93560X (9 March 2015); doi: 10.1117/12.2079169
Published in SPIE Proceedings Vol. 9356:
High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications IV
Friedhelm Dorsch, Editor(s)
PDF: 7 pages
Proc. SPIE 9356, High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications IV, 93560X (9 March 2015); doi: 10.1117/12.2079169
Show Author Affiliations
Monnamme Tlotleng, CSIR National Laser Ctr. (South Africa)
Univ. of Johannesburg (South Africa)
Esther T. Akinlabi, Univ. of Johannesburg (South Africa)
Univ. of Johannesburg (South Africa)
Esther T. Akinlabi, Univ. of Johannesburg (South Africa)
Mukul Shukla, Univ. of Johannesburg (South Africa)
Motilal Nehru National Institute of Technology (India)
Sisa Pityana, CSIR National Laser Ctr. (South Africa)
Motilal Nehru National Institute of Technology (India)
Sisa Pityana, CSIR National Laser Ctr. (South Africa)
Published in SPIE Proceedings Vol. 9356:
High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications IV
Friedhelm Dorsch, Editor(s)
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