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Interfacial Fracture Toughness of a Plasma Sprayed Hydroxyapatite Coating Used for Orthopedic Implants

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Abstract

This study introduces a new method for evaluating the adhesion strength of a coating on a substrate. The interfacial fracture toughness, Γi is used to assess the work per unit area required to separate an interface. Γi is measured for the as-received specimens of hydroxyapatite plasma sprayed on Ti-6A1-4V substrate. Calculation of the interfacial fracture toughness requires that the elastic modulus of the coating to be known. The Young’s modulus of the plasma sprayed hydroxyapatite is assessed using a bend test. The effect of aqueous environment on the interfacial fracture toughness is also investigated.

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Authors and Affiliations

  1. Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA

    Y. Sugimura

  2. Department of Orthopedic Surgery, Brigham and Women’s Hospital, Boston, MA, 02115, USA

    M. Spector

Authors
  1. Y. Sugimura
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  2. M. Spector
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Correspondence to Y. Sugimura.

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Sugimura, Y., Spector, M. Interfacial Fracture Toughness of a Plasma Sprayed Hydroxyapatite Coating Used for Orthopedic Implants. MRS Online Proceedings Library 550, 367–372 (1998). https://doi.org/10.1557/PROC-550-367

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  • DOI: https://doi.org/10.1557/PROC-550-367

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