ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Hydroxyapatite(HAP) has excellent osteoconductive properties. By controlling the Ca/Pratio better biphasic calcium phosphate ceramics can be produced than pure HAP ceramics. β-calcium pyrophosphate(β-Ca2P2O7) is a new biodegradable ceramic material and its biologicalresponse is quite similar to HAP. Obtaining HAP and other bioactive calcium phosphate ceramiccoatings has been a popular research field in the past. In our research a new bioceramic compositecoating was obtained by laser cladding with pre-depositing mixed powders of CaHPO4·2H2O andCaCO3 directly on the metal substrate. Its main constituents are HAP and β-Ca2P2O7. Themicrostructure of the coating consists of minute granular HAP that is distributed among theoverlapped club-shaped or needle-like β-Ca2P2O7. The hardness distribution in the cladding layer iseven and its value is much higher than that in the substrate. There is a bonded structure of theepitaxial planar growth between the substrate and cladding layer, and both a typical cellularmicrostructure in the middle and an equiaxed microstructure at the top of the cladding layer
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.625.pdf
