Macrochanneled tetragonal zirconia polycrystals coated by a calcium phosphate layer

Young-Hag Koh, Hae Won Kim, Hyoun Ee Kim, John W. Halloran

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A coextrusion process was used to fabricate three-directionally macrochanneled tetragonal zirconia polycrystals (TZP) with a calcium phosphate coating layer. The three-directionally connected structure was built by a unique alignment and a lamination of the TZP surrounded by calcium phosphate and carbon black filaments. After a thermal treatment (binder burnout and sintering), a 52 vol% array of 290 μm, three-directionally connected macrochannels, which were clad on the inside with bioactive calcium phosphate, had formed on the sintered TZP body. For a comparison, porous calcium phosphate with a similar structure was also fabricated. The compressive strength (96 MPa) of the three-directionally macrochanneled TZP with a bioactive calcium phosphate layer was much higher than that (24 MPa) of the three-directionally macrochanneled calcium phosphate.

Original languageEnglish
Pages (from-to)2027-2030
Number of pages4
JournalJournal of the American Ceramic Society
Issue number12
Publication statusPublished - 2003 Dec 1
Externally publishedYes


ASJC Scopus subject areas

  • Ceramics and Composites

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