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Formation Of Structure And Surface Morphology In Hydroxyapatite Types Of Ceramics During Sintering

Author

Listed:
  • J. J. PRIETO-VALDÉS

    (Association for Biomaterials R & D, Inc., PO Box 01-0648, Miami, FL 33101-0648, USA)

  • S. ALFARO HERNÁNDEZ

    (Esc. Sup. de Física y Matemáticas, Instituto Politécnico Nacional de Mexico, 07738, D.F., Mexico)

  • G. RUEDA MORALES

    (Esc. Sup. de Física y Matemáticas, Instituto Politécnico Nacional de Mexico, 07738, D.F., Mexico)

  • V. P. GORTCHEVA

    (Departimento de Física, CINVESTAV-IPN, 07740, D.F., Mexico)

Abstract

Hydroxyapatite powders with Ca/P ratios of 1.67 and 1.5 were processed by ceramic methods and studied during sintering using X-ray diffraction and atomic force microscopic methods, paying particular attention to the structural and surface morphology formations of the ceramics during sintering. For stoichiometric samples sintering starts at 1000°C through the formation of a quasihexagonal grain configuration. This morphology is conserved after the decomposition processes of hydroxyapatite in the range of 1200–1450°C. For calcium-deficient hydroxyapatite, sintering starts at temperatures close to 800°C through the formation of a fibrous structure. After reaching 1450°C these samples are composed of tricalcium phosphate, thus conserving the fibrous morphology, which resembles biological hard tissue.

Suggested Citation

  • J. J. Prieto-Valdés & S. Alfaro Hernández & G. Rueda Morales & V. P. Gortcheva, 1997. "Formation Of Structure And Surface Morphology In Hydroxyapatite Types Of Ceramics During Sintering," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 4(04), pages 671-677.
    • Handle: RePEc:wsi:srlxxx:v:04:y:1997:i:04:n:s0218625x97000663
    DOI: 10.1142/S0218625X97000663
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