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Whisker‐Reinforced Calcium Phosphate Cements
Author(s) -
Müller Frank A.,
Gbureck Uwe,
Kasuga Toshihiro,
Mizutani Yoichiro,
Barralet Jake E.,
Lohbauer Ulrich
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01967.x
Subject(s) - whisker , whiskers , flexural strength , scanning electron microscope , materials science , composite material , calcium , phosphate , bending , chemistry , metallurgy , organic chemistry
Self‐setting calcium phosphate cements (CPC) consisting of hydroxyapatite (HA) and tetracalcium phosphate were reinforced with various amounts of hydrothermally synthesized HA whiskers with an aspect ratio of 10. Flexural strength (σ b ) and work of fracture (γ wof ) were calculated by four‐point bending tests, and fracture surfaces were analyzed by scanning electron microscopy (SEM). σ b and γ wof of the CPCs that were reinforced with 30 vol% HA whiskers increased by 60% to 7.4 MPa and by 122% to 102 J/m 2 , respectively. SEM analyses reveal that this increase could be correlated to energy‐dissipating processes (e.g., whisker pull‐out) at the crack tip.