Abstract：
: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.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Lopes MA,Monteiro FJ,Santos JDdoi
10.1016/s0142-9612(99)00112-xkeywords:
subject
Has Abstractpub_date
1999-11-01 00:00:00pages
2085-90issue
21eissn
0142-9612issn
1878-5905pii
S0142-9612(99)00112-Xjournal_volume
20pub_type
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