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http://dx.doi.org/10.4150/KPMI.2010.17.3.203

Microstructure and Mechanical Properties of Al2O3/Fe-Ni Nanocomposite Prepared by Rapid Sintering  

Lee, Young-In (Department of Fine Chemical Engineering, Hanyang University)
Lee, Kun-Jae (Department of Fine Chemical Engineering, Hanyang University)
Jang, Dae-Hwan (Department of Fine Chemical Engineering, Hanyang University)
Yang, Jae-Kyo (Gangwon Industrial Technology Research Center, Research Institute of Industrial Science & Technology)
Cho, Yong-Ho (Department of Fine Chemical Engineering, Hanyang University)
Publication Information
Journal of Powder Materials / v.17, no.3, 2010 , pp. 203-208 More about this Journal
Abstract
A new High Frequency Induction Heating (HFIH) process has been developed to fabricate dense $Al_2O_3$ reinforced with Fe-Ni magnetic metal dispersion particles. The process is based on the reduction of metal oxide particles immediately prior to sintering. The synthesized $Al_2O_3$/Fe-Ni nanocomposite powders were formed directly from the selective reduction of metal oxide powders, such as NiO and $Fe_2O_3$. Dense $Al_2O_3$/Fe-Ni nanocomposite was fabricated using the HFIH method with an extremely high heating rate of $2000^{\circ}C/min$. Phase identification and microstructure of nanocomposite powders and sintered specimens were determined by X-ray diffraction and SEM and TEM, respectively. Vickers hardness experiment were performed to investigate the mechanical properties of the $Al_2O_3$/Fe-Ni nanocomposite.
Keywords
Nanocomposite; High frequency induction heating; Reduction; Fe-Ni dispersion particle; $FeAl_2O_4$ spinel; Mechanical properties;
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