Arafat, Andril and Idris, Mohd. Hasbullah and Abdul Kadir, Mohammed Rafiq and Jafari, Hassan (2014) Characterisation of calcium phosphate coating on investment cast 316L stainless steel. Materials Research Innovations, 18 . pp. 886-891. ISSN 1432-8917
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Official URL: http://dx.doi.org/10.1179/1432891714Z.000000000528
Abstract
Medical grade 316L stainless steel (316L-SS) was coated with hydroxyapatite (HA) using investment casting technique. The molten metal was poured into a HA coated ceramic mould at 1650°C under vacuum. The coated samples were vacuum sintered in a furnace at three different temperatures for 1 h. The cast and sintered coated samples were characterised using scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction analysis. A uniform layer of HA was formed on ceramic mould by dipping method. The cast samples showing good HA coating and bonding and form of a complex calcium-chromium oxide layer at the interface between HA and 316L-SS. The results confirmed increased crystallinity of the coating with increasing sintering temperature. Ca/P atomic ratio was found to decrease from 1·98 in the as cast coated sample to 1·69 and 1·61 for samples sintered at 800 and 1000° C respectively, which are close to that of human bone.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 316l stainless steel, ca/p atomic ratio, hydroxyapatite, investment casting, sintering |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Mechanical Engineering |
| ID Code: | 52085 |
| Deposited By: | Siti Nor Hashidah Zakaria |
| Deposited On: | 01 Feb 2016 03:53 |
| Last Modified: | 30 Nov 2018 07:00 |
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