Adhesion and microstructural characterization of plasma-sprayed hydroxyapatite/glass ceramic coatings onto Ti-6A1-4V substrates

• Type: Article in International Scientific Journal
• Date: 1998

Authors

Silva, PL (Author) Other; Santos, JD (Author) FEUP; Monteiro, FJ (Author) FEUP; Knowles, JC (Author) Other

Journal

Title: Surface and Coatings Technology

Vol. 102

Pages: 191-196

ISSN: 0257-8972

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 51 Citations

ISI Web of Science

Scopus - 58 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Materials engineering

CORDIS: Technological sciences > Engineering > Biomaterial engineering ; Technological sciences > Engineering > Biomedical enginnering

Other information

Authenticus ID: P-001-839

DOI: 10.1016/s0257-8972(97)00576-8

Abstract (EN): Commercial hydroxyapatite (HA), Ca(10)(PO(4))(6)(OH)(2) powders were reinforced with 4% of a CaO-P(2)O(5) based glass during its sintering process. Double layered coatings were obtained by Plasma Spraying and composed of 50 mu m commercial HA, followed by a 50 mu m (HA)/P(2)O(5)-CaO based glass composite coating. Samples were characterized by X-ray diffraction (XRD) analysis and it was shown that they were constituted of an HA matrix with small traces of tricalcium phosphate (beta-TCP) phase. The XRD spectra were quite similar to those of commercial HA coatings. For coating to substrate adhesion two different tests were performed: adhesion tests according to ASTM C 633-79 and ASTM D 1002-83 standards. Higher values were obtained for ASTM C 633-79 than for ASTM D 1002-83, 35 and 15 MPa, respectively. This behavior is discussed in terms of the different stress effort applied to specimens. The results obtained with ASTM C 633-79 show that these double layered satisfy the stress requirements for load bearing biomedical applications. (C) 1998 Published by Elsevier Science S,A.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6