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Whisker-reinforced calcium phopshate cements

Müller, F.A. / Gbureck, U. / Kasuga, T. / Mizutani, Y. / Barralet, J.E. / Lohbauer, U.

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 (sigma_b) and work of fracture (gamma_wof) were calculated by four-point bending tests, and fracture surfaces were analyzed by scanning electron microscopy (SEM). Sihma_b and gamma_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/m², respectively. SEM analyses reveal that this increase could be correlated to energy-dissipating processes (e.g., whisker pull-out) at the crack tip.

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Whisker-reinforced calcium phopshate cements

Müller, F.A. / Gbureck, U. / Kasuga, T. / Mizutani, Y. / Barralet, J.E. / Lohbauer, U.

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 (sigma_b) and work of fracture (gamma_wof) were calculated by four-point bending tests, and fracture surfaces were analyzed by scanning electron microscopy (SEM). Sihma_b and gamma_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/m², respectively. SEM analyses reveal that this increase could be correlated to energy-dissipating processes (e.g., whisker pull-out) at the crack tip.

Whisker-reinforced calcium phopshate cements

Müller, F.A. / Gbureck, U. / Kasuga, T. / Mizutani, Y. / Barralet, J.E. / Lohbauer, U.

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 (sigma_b) and work of fracture (gamma_wof) were calculated by four-point bending tests, and fracture surfaces were analyzed by scanning electron microscopy (SEM). Sihma_b and gamma_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/m², respectively. SEM analyses reveal that this increase could be correlated to energy-dissipating processes (e.g., whisker pull-out) at the crack tip.

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Title:

Whisker-reinforced calcium phopshate cements

Additional title:

Whiskerverstärkter Calciumphosphatzement

Contributors:

Müller, F.A. (author) / Gbureck, U. (author) / Kasuga, T. (author) / Mizutani, Y. (author) / Barralet, J.E. (author) / Lohbauer, U. (author)

Published in:

Journal of the American Ceramic Society ; 90 ; 3694-3697

Publication date:

2007

Size:

4 Seiten, 3 Bilder, 1 Tabelle, 22 Quellen

ISSN:

DOI:

https://doi.org/10.1111/j.1551-2916.2007.01967.x

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Calciumphosphat , Zement , Hydroxylapatit , Whisker , faserverstärkter Werkstoff , hydrothermales Verfahren , Struktur (Werkstoff) , Biegefestigkeit , Bruchflächenaussehen , Rasterelektronenmikroskopie , Bruchmechanik , Rissbildung , Knochenersatzwerkstoff , Zahnersatz

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