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Macrochanneled Tetragonal Zirconia Polycrystals Coated by a Calcium Phosphate Layer
Author(s) -
Koh YoungHag,
Kim HaeWon,
Kim HyounEe,
Halloran John W.
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03603.x
Subject(s) - materials science , calcium , sintering , composite material , layer (electronics) , phosphate , coating , porosity , cubic zirconia , tetragonal crystal system , lamination , compressive strength , ceramic , metallurgy , crystallography , crystal structure , chemistry , organic chemistry
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.