Surface coatings of bioactive glasses on high strength ceramic composites
Dense and ultrafine alumina–zirconia composites (Al 2O 3–16 wt%ZrO 2 and ZrO 2–20 wt%Al 2O 3) are developed and characterized for load bearing prosthetic applications. The improvement of the ceramic/bone interface, namely of the ceramic bioactivity, is performed by a glass coating on the surface of...
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Veröffentlicht in: | Applied surface science 2009-04, Vol.255 (13), p.6679-6685 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Dense and ultrafine alumina–zirconia composites (Al
2O
3–16
wt%ZrO
2 and ZrO
2–20
wt%Al
2O
3) are developed and characterized for load bearing prosthetic applications. The improvement of the ceramic/bone interface, namely of the ceramic bioactivity, is performed by a glass coating on the surface of the composites. A new composition is used to produce the glass powder, by melting at 1550
°C the mixture of oxide raw materials. The processing to obtain a homogeneous and adherent coating on the ceramic substrates is investigated: the optimal temperature for the glazing treatment is 1200
°C. The microstructure of the coating and of the ceramic/coating interface, the adhesion and some mechanical properties of the prepared glass and of the coating are analyzed. Besides, the in vitro bioactive responses, by incubation of osteoblast-like cells on the coated samples, are evaluated: positive results are confirmed after 24
h and 72
h. |
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ISSN: | 0169-4332 1873-5584 |
DOI: | 10.1016/j.apsusc.2009.02.069 |