PMID: 15348779Feb 1, 1997Paper

New Y-TZP powders for medical grade zirconia

Journal of Materials Science. Materials in Medicine
W BurgerM Boccalari

Abstract

There is interest in using zirconia for biomedical applications as ball heads for total hip prostheses. Two potential types are under discussion: partially stabilized zirconia (PSZ) and tetragonal zirconia polycrystals (TZP) materials. Because of its enhanced material properties, TZP stabilized with yttria is favourable. To eliminate high amounts of natural radioactive impurities, the precursors are purified. The kind of precursor and purification method determine the powder impurity level. The disadvantage of Y-TZP is that the hydrothermal decomposition reaction method is that it depends very strongly on the grain size and the distribution of the stabilizing yttria within the zirconia grains. Thermodynamical and kinetic investigations on high purity coprecipitated and yttria-coated zirconia powders show different behaviours. Y-TZP materials based on yttria-coated zirconia powders show excellent mechanical strength of more than 1000 MPa, a Weibull modulus of up to 20 a! nd a fracture toughness of 9 MPa radical m. The material properties of Y-TZP ceramics based on coprecipitated powders and prepared under the same conditions are less attractive. It is expected that materials based on yttria-coated zirconia will show enhanced pro...Continue Reading

Citations

Aug 26, 2010·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Armin KirstenHorst Fischer
Nov 18, 2005·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·S AffatatoA Toni
Jul 3, 2007·Clinical Orthopaedics and Related Research·Mariano Fernandez-FairenFrancisco J Gil
Nov 29, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Chandkiram GautamRobert Vajtai
Jul 10, 2009·Science and Technology of Advanced Materials·Gustavo SuárezEsteban F Aglietti
May 5, 2020·Journal of the Mechanical Behavior of Biomedical Materials·Christian GrossAndres Stricker

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