The In Situ Preparation of MgAl₂O₄/YAG Eutectic Composites by Reaction Sintering Using Induction Heating

Abstract:

High density MgAl₂O₄/YAG (yttrium aluminum garnet) eutectic composites were successfully prepared by in-situ reaction sintering using induction heating (IH). The effects of IH time and the starting materials composition on the phase composition and microstructure were investigated. The results showed that the eutectic composites consisted of only MgAl₂O₄ and YAG phase could be prepared by IH in a short time in a range of Al₂O₃/MgO ratio between 1~1.54. Compared to conventional sintering (CS), the solubility of Al₂O₃ in spinel is remarkably enhanced under the synergistic effects of high temperature and induced electromagnetic field. The higher YAG content facilitates the formation of more eutectic liquid phase, which favors to obtain a more homogeneous and denser interpenetrating network structure.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 111-117
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.111
• Online since: August 2018
• Authors: Huan Xu, Xi Tang Wang*, Zhou Fu Wang, Yan Ma, Hao Liu
• Keywords: Induction Heating, MgAl₂O₄-YAG Composites, Microstructure, Solubility

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