Research on High Performance Fe3Si-Si3N4-SiC Composite Used for Blast Furnace
Yong Li, Xiaoyan Zhu, Yawei Zhai, Jiaping Wang, Wendong Xue*, Junhong Chen, Jialin Sun
Identifiers and Pagination:Year: 2012
First Page: 1
Last Page: 5
Publisher Id: TOMSJ-6-1
Article History:Received Date: 29/10/2010
Revision Received Date: 6/2/2011
Acceptance Date: 7/2/2011
Electronic publication date: 18/1/2012
Collection year: 2012
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Excellent Fe3Si-Si3N4-SiC composites were successfully prepared with FeSi75 and SiC as main starting materials by nitridation reaction(at 1300°C for 8Hrs). The material properties were studied; the ferrosilicon nitridation mechanism was analyzed through chemical thermodynamics; phase composition, microstructure, corrosion resistance of products were also investigated. The results are shown that the comprehensive properties of Fe3Si-Si3N4-SiC are outstanding. The nitridation products are fiber-like α-Si3N4 and rod-like β-Si3N4, which makes better mechanical behavior due to fiber reinforcement; a great deal of Fe3Si intermetallic compounds uniformly distribute in matrix, which is one of the products of Fe-Si nitridation and as a plastic phase forming in grain boundary optimizes the performance of products. Chemical thermodynamic analysis is shown that the fiber-like α-Si3N4 is formed by SiO(g) and N2(g) reaction which also increases the rate of nitridation. Fe3Si-Si3N4-SiC material has high corrosion resistance. Now it has been successfully applied to one 2000M3 domestic steel plant, the blast furnace operation goes well.