Fabrication and compressive strength of macrochannelled tetragonal zirconia polycrystals with calcium phosphate coating layer

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Macrochannelled tetragonal zirconia polycrystals (TZP) coated with a calcium phosphate layer were fabricated using a coextrusion process to produce strong and bioactive porous bioceramics. The initial feedrod, composed of three materials [TZP (shell), calcium phosphate (intermediate layer), and carbon black (core)], was coextruded through a 750-μm orifice at 120°C, producing a continuous and flexible filament. Each sheet, which was composed of a unidirectional array of filaments, was stacked and then warm-pressed at 140°C with 10 MPa. After binder burnout, the green billet was sintered between 1350 and 1600°C for 1 h in air, leaving uniform macrochannels clad on the inside with bioactive calcium phosphate on a strong TZP body. The compressive strength of the specimen was much higher than that of calcium phosphate with a similar structure.

Original languageEnglish
Pages (from-to)2009-2012
Number of pages4
JournalJournal of Materials Research
Volume18
Issue number9
Publication statusPublished - 2003 Sep 1
Externally publishedYes

Fingerprint

Phosphate coatings
calcium phosphates
compressive strength
Polycrystals
Calcium phosphate
polycrystals
zirconium oxides
Zirconia
Compressive strength
coatings
Fabrication
Coatings
fabrication
activity (biology)
filaments
Coextrusion
Soot
burnout
Bioceramics
billets

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Fabrication and compressive strength of macrochannelled tetragonal zirconia polycrystals with calcium phosphate coating layer. / Koh, Young-Hag; Kim, Hae Won; Kim, Hyoun Ee; Halloran, John W.

In: Journal of Materials Research, Vol. 18, No. 9, 01.09.2003, p. 2009-2012.

Research output: Contribution to journalArticle

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