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

被引：115

作者：

Lopes, MA

Monteiro, FJ

Santos, JD

机构：

[1] Inst Biomed Engn, Lab Biomat, P-4150 Porto, Portugal

[2] Univ Porto, Fac Engn, Dept Met & Mat Engn, P-4099 Oporto, Portugal

来源：

BIOMATERIALS | 1999年 / 20卷 / 21期

关键词：

hydroxyapatite-glass composites; microstructure; tricalcium phosphate; fracture toughness; hardness;

D O I：

10.1016/S0142-9612(99)00112-X

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

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. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2085 / 2090

页数：6

共 35 条

[1] MECHANICAL-PROPERTIES OF SINTERED HYDROXYAPATITE FOR PROSTHETIC APPLICATIONS [J].