Articles - Rapid consolidation of nanostuctured Al2O3 by high frequency induction heated sintering
- In-Jin Shona,b,*, In-Yong Koa, Hui-Soo Juna, Jung-Mann Dohc, Kyung-Tae Hongc and Jin-Kook Yoonc
- a Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University, 561-756, Republic of Korea b epartment of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University, 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
The rapid sintering of nanostuctured Al2O3 hard materials in a short time was investigated with a high-frequency induction heating sintering process. The advantage of this process is that it allows very quick densification to near theoretical density and prohibition of grain growth in nanostuctured materials. A dense nanostructured Al2O3 hard material with a relative density of up to 99.8% was produced with simultaneous application of 80 MPa pressure and induced current output of total power capacity (15 kW) within 2 minutes. The effect of ball milling time on the sintering behavior, grain size and mechanical properties of binderless Al2O3 was investigated.
Keywords: Sintering; Al2O3; Nanostructured material; Powder metallurgy
This Article
Copyright 2019 International Orgranization for Ceramic Processing. All rights reserved.Clean-Energy Research Institute(CRI), Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Korea
E-mail: jcpr@hanyang.ac.kr