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Microstructural dependence on relevant physical–mechanical properties on SiO2–Na2O–CaO–P2O5 biological glasses

Paper ID Volume ID Publish Year Pages File Format Full-Text
13154 834 2002 13 PDF Available
Title
Microstructural dependence on relevant physical–mechanical properties on SiO2–Na2O–CaO–P2O5 biological glasses
Abstract

Bioactive glasses of the system SiO2–Na2O–CaO–P2O5 have been prepared by the normal melting and annealing technique. The elastic moduli, attenuation, Vickers hardness, fracture toughness and fracture surface energy have been obtained using the known method at room temperature. The temperature dependence of elastic moduli and attenuation measurements have been extended over a wide range of temperature from 150 to 500 K. The SiO2 content dependence of velocities, attenuation, elastic moduli, and other parameters show an interesting observation at 45 wt% of SiO2 by exhibiting an anomalous behaviour. A linear relation is developed for Tg, which explores the influence of Na2O on SiO2–Na2O–CaO–P2O5 bioactive glasses. The measured hardness, fracture toughness and fracture surface energy show a linear relation with Young's modulus. It is also interesting to note that the observed results are functions of polymerisation and the number of non-bridging oxygens (NBO) prevailing in the network with change in SiO2 content. The temperature dependence of velocities, attenuation and elastic moduli show the existence of softening in the glass network structure as temperature increases.

Keywords
Ultrasonic velocity measurements; Bioactive glasses; Elastic properties; Fracture toughness and fracture surface energy; Structural softening
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Microstructural dependence on relevant physical–mechanical properties on SiO2–Na2O–CaO–P2O5 biological glasses
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 23, Issue 21, November 2002, Pages 4263–4275
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us