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Glass-reinforced hydroxyapatite composites: fracture toughness and hardness dependence on microstructural characteristics

Title
Glass-reinforced hydroxyapatite composites: fracture toughness and hardness dependence on microstructural characteristics
Type
Article in International Scientific Journal
Year
1999
Authors
Lopes, MA
(Author)
Other
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Monteiro, FJ
(Author)
FEUP
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Santos, JD
(Author)
FEUP
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Journal
Title: BiomaterialsImported from Authenticus Search for Journal Publications
Vol. 20 No. 21
Pages: 2085-2090
ISSN: 0142-9612
Publisher: Elsevier
Indexing
Publicação em ISI Web of Science ISI Web of Science
COMPENDEX
Scientific classification
FOS: Engineering and technology > Environmental biotechnology
CORDIS: Technological sciences > Engineering > Biomaterial engineering ; Technological sciences > Technology > Biotecnology
Other information
Authenticus ID: P-001-2WM
Abstract (EN): Fracture toughness and hardness properties of CaO-P2O5 glass-reinforced hydroxyapatite composites have been assessed using indentation techniques and results calculated according to Laugier and Evans' equations. Both properties showed to be dependent upon several microstructural characteristics, namely residual porosity and the percentage of secondary beta and alpha tricalcium phosphate phases in the structure of the composites. Composites presented a Palmqvist-type indentation crack system, which is the specific crack system addressed by Laugier's approach. Fracture toughness determinations according to Evan's equation, which is a universal one and adapted to both median and Palmqvist crack systems, did not correlate well with Laugier determinations.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 6
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