An improvement in processing of hydroxyapatite ceramics

Hydroxyapatite ceramics were fabricated via two different processing routes, a conventional processing route and an emulsion-refined route. The conventional precipitation processing of powder precursors results in the formation of hard particle agglomerates, which degrade both the compaction and den...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 1995-06, Vol.30 (12), p.3061-3074
Main Authors: MURRAY, M. G. S, WANG, J, PONTON, C. B, MARQUIS, P. M
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hydroxyapatite ceramics were fabricated via two different processing routes, a conventional processing route and an emulsion-refined route. The conventional precipitation processing of powder precursors results in the formation of hard particle agglomerates, which degrade both the compaction and densification behaviour of the resultant powder compacts. An emulsion-refinement step is shown to be effective in "softening" the particle agglomerates. As a result, the emulsion-refined powder compact exhibits both a higher green density and a higher sintered density than the un-refined powder compact, on sintering at temperatures above 800 C. The effect of powder agglomeration on densification during both the initial and later stage of sintering is discussed. A fracture strength of 170 plus or minus 12.3 MPa was measured for the emulsion-refined material compared to 70 plus or minus 15.4 MPa for the conventionally processed material, when both were sintered at 1100 C for 2 h. 34 refs.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF01209218