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

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Silva, PL (Autor) Outra; Santos, JD (Autor) FEUP; Monteiro, FJ (Autor) FEUP; Knowles, JC (Autor) Outra

Revista

Título: Surface and Coatings Technology

Vol. 102

Páginas: 191-196

ISSN: 0257-8972

Editora: Elsevier

Indexação

ISI Web of Knowledge - 51 Citações

ISI Web of Science

Scopus - 58 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia de biomateriais ; Ciências Tecnológicas > Engenharia > Engenharia biomédica

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6