Effect of the Addition of Al Power on the Microstructure and Phase Constitution of Al2O3-MgO Composites Sintered at 1700°C under N2 Atmosphere

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Al2O3-MgO-Al composites were prepared by sintering in carbon tube furnace at 1700°C under nitrogen atmosphere with tabular alumina, sintered magnesia and aluminum powder as raw materials. Effect of Al powder content on the porosity, microstructure and phase constitution of Al-Al2O3-MgO composites were investigated. The results show that the main phase was non-stoichiometric spinel solid solution, and a little AlN, AlON and MgAlON were detected by XRD. With Al power content increasing, the amount of the porosity and AlN, AlON and MgAlON around the porosity detected by SEM increased. These new phases enhance the combination of the large particles and the matrix.

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Edited by:

Wei Pan, Jianghong Gong

Pages:

341-344

Citation:

J. J. Ma et al., "Effect of the Addition of Al Power on the Microstructure and Phase Constitution of Al2O3-MgO Composites Sintered at 1700°C under N2 Atmosphere", Key Engineering Materials, Vol. 697, pp. 341-344, 2016

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July 2016

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