Articles - Effect of a glass addition on the ceramic layer prepared by a thermite reaction under a centrifugal force
- Minh-Tung Lea, Cheol-Gi Kima, Yang-Kyu Ahnb and Hun-Saeng Chungb,*
- a Department of Material Science & Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea. b Department of Chemistry, Konyang University, 119 Daehak-ro, Nonsan, Chungnam 320-711, Korea.
Abstract
A ceramic layer was produced on a steel pipe inner surface by a centrifugal thermite process. A powdery mixture of ferric oxide and aluminum was used with the glass whose major compositions were SiO2, Na2O, CaO, and MgO. The ceramic layer consisted of the crystalline structures of corundum (α-Al2O3) and hercynite (FeAl2O4). The amorphous phases of Ca3Al2(SiO4)3, MgFeAlO4 and NaAlSiO4 in the ceramic layer were found to be responsible for a significant improvement of the dense structure. The glass addition increased the density of the ceramic layer from 2.9 g/cm3 to 3.6 g/cm3 and the hardness from 1,450 to 1,800 Hv.
Keywords: Centrifugal thermite process, Ceramic lining, Thermite reaction, Glass.
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