Preparation of Ceramic Lined Pipe by Centrifugal-thermit Process - Physical Properties of Ceramic Layer

doi:None

All Issue

2008 Vol.45, Issue 3 Preview Page Next Page

Preparation of Ceramic Lined Pipe by Centrifugal-thermit Process - Physical Properties of Ceramic Layer 원심테르밋반응에 의한 파이프 세라믹층 형성 - 세라믹층의 물리적 특성: Le M. Tung, 안종관, 이재령
Le M. Tung, Jong-gwan Ahn and Jaeryeong Lee

30 June 2008. pp. 229-233

PDF

Abstract

The inner surface of a steel pipe could be lined with ceramics by means of a SHS reaction under centrifugal force. Some physical characteristics of the ceramic layer were investigated with the change of filling ratio (thermit mixture, Fe2O3 and Al) and the addition of silica. Two compositions, -Al2O3 and FeAl2O4, were detected in the dispersed phase. The size of alumina grains became larger towards the pipe innermost side at high mixture filling ratios. Additionally, it was found that amorphous silicate materials formed by the addition of silica makes the layer dense significantly. The apparent density and hardness of the ceramic layer were improved from 2.9 g/cm3 and 1,430 Hv to 3.7 g/cm3 and 1,700 Hv with the effect of additive, silica.

Keywords

Centrifugal-Thermit process

Ceramic lining

Apparent density

Hardness

원심장 영역에서 자전연소반응(원심테르밋반응)을 이용하여 일반강관 내부에 세라믹 코팅층의 형성이 가능하였다. 원심테르밋반응의 공정변수, 테르밋 혼합원료 충진량, SiO2 첨가량을 변화시키면서 형성된 세라믹 층의 물리적 특성의 변화를 조사하였다. 코팅된 세라믹 층은 두 성분(-Al2O3와 FeAl2O4)이 분산된 상태로 존재하였다. 또한, 원료 충진량이 증가함에 따라 파이프 내부방향으로 갈수록 -Al2O3의 입자크기가 커지는 경향을 나타내었다. SiO2 첨가에 의해 세라믹 층에 비정질 SiO2가 형성되었으며, 첨가제 효과로 세라믹 층의 밀도는 2.9 g/cm3에서 3.7 g/cm3로 증가하였고, 이로 인하여 강도는 1,430 Hv에서 1,700 Hv로 향상되었다.

키워드

원심테르밋공정

세라믹 코팅

겉보기 밀도

강도

References

Chai, H., Guo, Y., Fan, Q., Wang, X., and Wang, X., 1995, “Effects of additives Si on casting structure of ceramic liner produced by a centrifugal-thermit process,” J. Mater. Sci., 30, pp. 2554-2558.
Meng, Q. S., Chen, S. P., Zhao, J. F., Zhang, H., Zhang, H. X., and Munir, Z. A., 2007, “Microstructure and mechanical properties of multilayer-lined composite pipes prepared by SHS centrifugal-thermit process,” Mater. Sci. Eng. A., 456, pp. 332-336.
Merzhanov, A. G., 1997, “Worldwide evolution and present status of SHS as branch of modern R&D,” Inter. J. SHS., 6, pp. 119-130.
Mu, L., Yin, S., Yanping, W., and Heyi, L., 1997, “The characteristics of combustion in a centrifugal-thermite process,” J. Mater. Sci., 32, pp. 4711-4713.
Odawara, O., 1990, “Long ceramic lined pipes produced by a centrifugal thermit process,” J. Am. Ceram. Soc., 73, pp. 629-633.
Odawara, O., 1996, “Ceramic linings of pipes using SHS technology,” Key Eng. Mater., 122-124, pp. 463-476.
Yin, S., Lin, T., Guo, Z., and Guo, S., 2000, “Development and industrial application of ceramic lined steel pipe,” Materials Review, 14(12), pp. 44-46.
Yin, S., Liu, M, Guo, Z., and Lai, H., 1993, “Feldspar additive in composite pipes made by a centrifugal SHS process,” Inter. J. SHS., 2, pp. 69-75.

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 :3
Pages :229-233

[1] Chai, H., Guo, Y., Fan, Q., Wang, X., and Wang, X., 1995, “Effects of additives Si on casting structure of ceramic liner produced by a centrifugal-thermit process,” J. Mater. Sci., 30, pp. 2554-2558.

[2] Meng, Q. S., Chen, S. P., Zhao, J. F., Zhang, H., Zhang, H. X., and Munir, Z. A., 2007, “Microstructure and mechanical properties of multilayer-lined composite pipes prepared by SHS centrifugal-thermit process,” Mater. Sci. Eng. A., 456, pp. 332-336.

[3] Merzhanov, A. G., 1997, “Worldwide evolution and present status of SHS as branch of modern R&D,” Inter. J. SHS., 6, pp. 119-130.

[4] Mu, L., Yin, S., Yanping, W., and Heyi, L., 1997, “The characteristics of combustion in a centrifugal-thermite process,” J. Mater. Sci., 32, pp. 4711-4713.

[5] Odawara, O., 1990, “Long ceramic lined pipes produced by a centrifugal thermit process,” J. Am. Ceram. Soc., 73, pp. 629-633.

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

[7] Yin, S., Lin, T., Guo, Z., and Guo, S., 2000, “Development and industrial application of ceramic lined steel pipe,” Materials Review, 14(12), pp. 44-46.

[8] Yin, S., Liu, M, Guo, Z., and Lai, H., 1993, “Feldspar additive in composite pipes made by a centrifugal SHS process,” Inter. J. SHS., 2, pp. 69-75.

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

All Issue