期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.08.044
关键词
CNTs; In situ; Ni-catalyzed phenolic resin; Ceramic whiskers; Al2O3-C refractories
类别
资金
- Natural Science Foundation of Hubei Province [2009CDA050]
- New Century Excellent Talents in University [NCET-10-0137]
- Natural Science Foundation of China [51072143]
- 973 project of China [2012CB722702]
- Wuhan Science and Technology Bureau [201271130449]
Microstructure and mechanical properties of Al2O3-C refractories using Ni-catalyzed phenolic resin as binder coked in the temperature range from 800 degrees C to 1400 degrees C are investigated in the present work. The results showed that only amorphous carbon formed from as-received phenolic resin, while crystalline graphite carbons, particularly multi-walled carbon nanotubes (MWCNTs) were gradually obtained from Ni-catalyzed phenolic resin with increasing the pyrolysis temperature from 450 degrees C to 1050 degrees C. The morphology and quantity of in situ formed carbon nanotubes (CNTs) in Al2O3-C matrix specimens were closely associated with the coking temperature. The mechanical properties such as cold modulus of rupture (CMOR), flexural modulus (E), force and displacement of Al2O3-C refractory specimens with addition of Ni-catalyzed phenolic resin were greatly improved compared with those with as-received phenolic resin. The improvement was attributed to the in situ catalytic formation of CNTs and more ceramic whiskers in the specimens containing Ni-catalyzed phenolic resin. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
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