Preparation of Ceramic Lined Pipe by Centrifugal-thermit Process - Micro-structure of Ceramic Layer

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2008 Vol.45, Issue 4 Preview Page Next Page

Preparation of Ceramic Lined Pipe by Centrifugal-thermit Process - Micro-structure of Ceramic Layer 원심테르밋반응에 의한 파이프 세라믹층 형성 - 미세조직 변화: Le M. Tung, 안종관, 이재령
Le M. Tung, Jong-gwan Ahn and Jaeryeong Lee

31 August 2008. pp. 354-359

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Abstract

Microstructures of the lined ceramic layers were surveyed in the case of SiO2 usage as an additive. The use has induced in the formation of amorphous silicate compounds, mullite (2FeO･SiO2) and fayalite (3Al2O3･2SiO2), for the ceramic layers. Which contributes the increase of keeping time as the liquid phase, and improves the densification for the layer in the course of cooling procedure. As the results of composite analysis in the layer after heat treatment at 1,150℃ and 1,350℃, it can be proposed that a mechanism of solidification and densification progresses through four steps for the ceramic layer formation.

Keywords

Ceramic lined pipe

Centrifugal-Thermit process

Microstructure

Densification

원심테르밋 공정에서 생성된 강관 내부 세라믹층의 미세조직 변화에 대해서 고찰하였다. SiO2 첨가는 세라믹층 내부에 비정질의 mullite(2FeO･SiO2)와 fayalite(3Al2O3･2SiO2)와 같은 실리케이트 화합물을 생성시켰고, 이 화합물이 세라믹층 형성과정 중 용융상 유지시간 증가와 원심장 작용 영역 내에서 치밀구조를 유도하였다. 생성 세라믹층의 1,150℃와 1,350℃열처리 후, 세라믹층의 조성을 분석한 결과, 원심테르밋 반응 생성물의 냉각과정을 통한 조직 형성 메카니즘을 연속된 4단계로 제시할 수 있었다.

키워드

세라믹 라이닝 파이프

원심테르밋공정

미세조직

치밀화

References

Aramaki, S., and Roy, R., 1959, “The mullite-corundum boundary in the systems MgO-Al2O3-SiO2 and CaOAl2O3-SiO2,” J. Am. Ceram. Soc., 42(12), pp. 644-645.
Bowen, N. L., and Schairer, J. F., 1932, “The system, FeO-SiO2,” Am. J. Sci., 5th Series, 24, p. 200.
Du, Z., Fu, H., Fu, H., and Xiao, Q., 2005, “A study of ceramic-lined compound copper pipe produced by SHScentrifugal casting,” Mater. Lett., 59, pp. 1853-1858.
Merzhanov, A. G., 2001, “SHS on the pathway to industrialization,” Inter. J. SHS., 10(2), pp. 237-255.
Odawara, O., 1985, “Ceramic lined pipes produced by a centrifugal-Thermit process,” Trans. JIM., 26(8), pp. 578-586
Odawara, O., 1996, “Ceramic linings of pipes using SHS technology,” Key Eng. Mater., 122-124, pp. 463-476.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society for Geosystem Engineering
Journal Title(Ko) :한국지구시스템공학회지
Volume : 45
No :4
Pages :354-359

[1] Aramaki, S., and Roy, R., 1959, “The mullite-corundum boundary in the systems MgO-Al2O3-SiO2 and CaOAl2O3-SiO2,” J. Am. Ceram. Soc., 42(12), pp. 644-645.

[2] Bowen, N. L., and Schairer, J. F., 1932, “The system, FeO-SiO2,” Am. J. Sci., 5th Series, 24, p. 200.

[3] Du, Z., Fu, H., Fu, H., and Xiao, Q., 2005, “A study of ceramic-lined compound copper pipe produced by SHScentrifugal casting,” Mater. Lett., 59, pp. 1853-1858.

[4] Merzhanov, A. G., 2001, “SHS on the pathway to industrialization,” Inter. J. SHS., 10(2), pp. 237-255.

[5] Odawara, O., 1985, “Ceramic lined pipes produced by a centrifugal-Thermit process,” Trans. JIM., 26(8), pp. 578-586

[6] Odawara, O., 1996, “Ceramic linings of pipes using SHS technology,” Key Eng. Mater., 122-124, pp. 463-476.

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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