Effect of the Addition of Al Powder on the Microstructure and Phase Constitution of Magnesia-Spinel Composites Sintered at 1800°C in N2

Yang Hong; Yong Li; Shang Hao Tong; Dan Dan Yue; Jia Jia Ma

doi:10.4028/www.scientific.net/KEM.697.345

Paper Titles

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Effect of the Addition of Al Powder on the Microstructure and Phase Constitution of Magnesia-Spinel Composites Sintered at 1800°C in N₂
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Preparation and Characterization of Al-Al₂O₃ Metal Ceramics via Powder Metallurgy Methods
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Microstructure and Mechanical Properties of Multiscale Zirconia Ceramics Prepared by Field Assisted Sintering Technique
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Preparation of Small Size Ceria Stabilized Zirconia Microspheres by External Gelation: Effect of Vibration Frequency
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 697Effect of the Addition of Al Powder on the...

Effect of the Addition of Al Powder on the Microstructure and Phase Constitution of Magnesia-Spinel Composites Sintered at 1800°C in N₂

Abstract:

Magnesia-spinel composites were prepared by sintering at 1800°C in N₂ with fused magnesia, sintered magnesia, MgO-Al₂O₃ spinel as raw materials and Al powder as additive. The compositions and microstructure of sintered products were investigated by XRD and SEM. The results show that a little AlN and MgAlON has been detected by XRD and SEM, indicating that AlN and MgAlON can be synthesized at 1800°C in N₂. Some Al from matrix reacts with minor O₂ existing in N₂ and forms gaseous Al₂O at the first stage of reaction, which causes the increasing porosity of samples with more Al powder added and the limited amount of AlN and MgAlON. AlON can not be detected in the samples.

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Key Engineering Materials (Volume 697)

Pages:

345-349

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https://doi.org/10.4028/www.scientific.net/KEM.697.345

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Online since:

July 2016

Authors:

Yang Hong, Yong Li*, Shang Hao Tong, Dan Dan Yue, Jia Jia Ma

Keywords:

Al₂O, AlN, AlON, MgAlON

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