Effects of Fe-Ni alloy nanoparticles on the mechanical properties and microstructures of Al₂O₃/Fe-Ni nanocomposites prepared by rapid sintering

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• 作者：Young-In Lee^a ; Jun-Tae Lee^a ; ^b ; Yong-Ho Choa^a ; ^{choa15@hanyang.ac.kr}
• 关键词：B. Nanocomposite ; C. Mechanical properties ; High frequency induction heated sintering (HFIHS) ; Fe&ndash ; Ni dispersion particle ; FeAl2O3 spinel ; Microstructure
• 刊名：Ceramics International
• 出版年：2012
• 期刊代码：13_02728842
• 类别：ms
• 出版时间：July, 2012
• 卷：38
• 期：5
• 页码：4305-4312
• 文件大小：1354 K

摘要

A high frequency induction heated sintering (HFIHS) process was applied to fabricate dense Al₂O₃ 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 Al₂O₃/Fe-Ni nanocomposite powders are formed directly from the selective reduction of metal oxide powders, including NiO and Fe₂O₃. A dense Al₂O₃/Fe-Ni nanocomposite was fabricated using the HFIHS method with an extremely high heating rate of 2000 掳C/min. The phase identification of nanocomposite powders and sintered specimens was determined by X-ray diffraction. Three-point bending tests and Vickers hardness experiments were performed to investigate the mechanical properties of the Al₂O₃/Fe-Ni nanocomposites and the relationship between microstructure and mechanical properties was investigated using TEM and SEM supported with EDX.