Articles - Simultaneous synthesis and consolidation of a nanocrystalline 8.33Fe0.24Cr0.43Al0.25Si0.08-Al2O3 composite by high-frequency induction heating
- In-Jin Shona,b,*, Song-Lee Dua, In-Yong Koa, Jung-Mann Dohc, Jin-Kook Yoonc and Sang-Whan Parkc
- a Division of Advanced Materials Engineering and Research Center of Advanced Materials Development, Engineering College, Chonbuk National University, Chonbuk, 561-756, Republic of Korea b Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University, Chonbuk, 561-756, Republic of Korea c Advanced Functional Materials Research Center, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Republic of Korea
Abstract
Nanopowders of Fe2O3, Cr, Si, and Al powders were fabricated by high-energy ball milling. A high-density nanocrystalline 8.33Fe0.24Cr0.43Al0.25Si0.08 -Al2O3 composite was simultaneously synthesized and consolidated by a high-frequency, inductionheated sintering (HFIHS) method within two minutes from mechanically activated powders of Fe2O3, Cr, Si, and Al. The advantage of this process is that it allows very quick densification to near theoretical density and prohibits grain growth in nano-structured materials. The hardness of the composite was about 1060 kg/mm2.
Keywords: Nanostructured materials, Sintering, Synthesis, Hardness, Composite materials.
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