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:
The present work deals with the preparation and characterization of ceramic compositesfor the substitution of load-bearing bone portions, made of hydroxyapatite (HA) and bioactive β-calcium silicate (β-Ca2SiO4) as a reinforcing phase. The composite materials were prepared by FastHot-Pressing technique (FHP), which allowed the rapid sintering of monolithic ceramics attemperatures up to 1500 °C, well above the commonly adopted temperatures for sintering ofhydroxyapatite (1200-1300 °C), in order to achieve the densification of the reinforcing phase also.XRD analysis reported no formation of secondary phases other than HA and β-Ca2SiO4, after FHPcycles. Flexural strength tests were performed on selected samples sintered at differenttemperatures: the composite materials exhibited increased mechanical resistance compared tosamples constituted of HA only. These preliminary results confirmed that composites of HA and β-Ca2SiO4 are promising for the development of bioactive load-bearing ceramic bone substitutes
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.423.pdf
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