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Journal of Ceramic Science and Technology

The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of  the relationships between processing, microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials. The papers may have either theoretical or experimental background. A high quality of publications will be guaranteed by a thorough double blind peer review process.

The Journal is published by Göller Verlag GmbH on behalf of the Deutsche Keramische Gesellschaft (DKG). Edited by Yu-Ping Zeng, Shanghai Institute of Ceramics, Chinese Academy of Sciences, China.

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Preparation and Characterization of Hydroxyapatite/Alumina Nanocomposites by High-Energy Vibratory Ball Milling

A. E. Hannora

Suez University, Faculty of Petroleum and Mining Engineering, Department of Science and Mathematics, Suez, Egypt, 43721.

received May 14, 2014, received in revised form July 3, 2014, accepted August 13, 2014

Vol. 5, No. 4, Pages 293-298   DOI: 10.4416/JCST2014-00019

Abstract

Hydroxyapatite/alpha-alumina composites were prepared by means of high-energy vibratory ball milling. The effect of the addition of alumina, from 5 to 25 wt%, was investigated. x-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) results indicated that hydroxyapatite and alumina were the major phases after mechanical milling and only small peak shifts were observed. Transmission electron microscope (TEM) photomicrographs revealed that the powder obtained after mechanical milling was composed of nanoparticles in the size of ∼ 40 nm. After 3h of air sintering at 1000 – 1200 °C, beta-tricalcium phosphate and alumina phases were found. The additional calcium aluminum phosphate phase might be formed during the sintering process at 1200 °C. The mechanical properties (compressive strength and Rockwell hardness) of the hydroxyapatite/alumina composites were improved with sintering temperatures and concentrations of alumina and the maximum value was found with 15 wt % alumina.

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Keywords

Mechanical alloying, hydroxyapatite, alumina and nanocomposite materials.

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