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 journalArticlepeer-review

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
DOIs
Publication statusPublished - 2003 Sept
Externally publishedYes

Bibliographical note

Funding Information:
This research was supported by a grant from the Center for Advanced Materials Processing (CAMP) of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea.

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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