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Growth Orientation of the Mechanosynthesized Fluorapatite-Based Composite Nanopowders: Influence of Subsequent Thermal Treatment

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Abstract

Growth orientation of fluorapatite–zirconia nanopowders was investigated after mechanical activation and thermal annealing process in the range of 600–1,300 °C for 1 h. Results revealed that during heating of the composite nanopowders the transition of the monoclinic zirconia to tetragonal form and its stabilization by calcium fluoride originating from the decomposition of fluorapatite as well as the formation of a solid solution of calcium fluoride in zirconia occurred. The influence of annealing on the growth orientation of fluorapatite–zirconia composite nanopowders indicated that the crystal growth of fluorapatite was preferentially accentuated on the (002) face in the direction of the crystallographic c-axis after heat treatment. Based on FE–SEM observations, the experimental outcome was composed of both agglomerates and fine particles (~33 nm) after 600 °C, while annealing of the sample at 1,300 °C demonstrated the occurrence of abnormal grain growth.

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Acknowledgments

The authors are grateful to research affairs of Islamic Azad University, Najafabad Branch for supporting of this research.

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Authors and Affiliations

  1. Materials Engineering Department, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran

    Bahman Nasiri-Tabrizi & Abbas Fahami

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  1. Bahman Nasiri-Tabrizi
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  2. Abbas Fahami
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Correspondence to Bahman Nasiri-Tabrizi.

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Nasiri-Tabrizi, B., Fahami, A. Growth Orientation of the Mechanosynthesized Fluorapatite-Based Composite Nanopowders: Influence of Subsequent Thermal Treatment. J Clust Sci 24, 1213–1221 (2013). https://doi.org/10.1007/s10876-013-0611-2

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  • DOI: https://doi.org/10.1007/s10876-013-0611-2

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