Effect of cooling rate and particle size on compressive strength of macroporous hydroxyapatite

Y. U. Kim, B. H. Lee, M. C. Kim, K. N. Kim, K. M. Kim, S. H. Choi, C. K. Kim, R. Z. LeGeros, Y. K. Lee

Research output: Contribution to journalArticlepeer-review

Abstract

The objective of this study was to produce a macroporous hydroxyapatite(HA) scaffold with high strength by controlling the size of HA particles as well as cooling rate from the sintering temperature. Macroporous polyurethane sponge was employed as template to manufacture the macroporous HA scaffolds. Particle sizes of HA powders selected in this study were 4 μm and 7 μm. They were dispersed in distilled water with organic additives and infiltrated into polyurethane sponge. After drying and sintering at 1300°C, cooled down to room temperature slowly to prevent microcracking either 1°C/min or 3°C/min. Density, porosity and compressive strength were measured with different particle size and cooling rate. Both density and compressive strength were increased with decreasing particle size or cooling rate, while porosity was not related to.

Original languageEnglish
Pages (from-to)1047-1050
Number of pages4
JournalKey Engineering Materials
Volume309-311 II
DOIs
Publication statusPublished - 2006

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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