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 language | English |
|---|---|
| Pages (from-to) | 2009-2012 |
| Number of pages | 4 |
| Journal | Journal of Materials Research |
| Volume | 18 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2003 Sept |
| Externally published | Yes |
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
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering