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http://acervodigital.unesp.br/handle/11449/65739
- Title:
- Ceramic coating for refractories protection against carbon oxidation, Part 1: Protection mechanisms
- Universidade Federal de São Carlos (UFSCar)
- Cia. Side-RúRgica Nacional
- Universidade Estadual Paulista (UNESP)
- 0020-5214
- For retarding carbon oxidation in refractories during the preheating of metallurgical furnaces, a ceramic coating, made mainly of sodium phosphosilicate and clay was developed. The coating presents high adherence to the substrate with no swelling. The coating was characterized by thermal analysis, X-ray diffraction at room temperature (XRD) and at high temperature (HTXRD), X-ray fluorescence and scanning electronic microscopy (SEM). The glass transition temperature is reached at 800 °C and only glassy phase is observed above this temperature. Thus the mechanism of protection seems to be the formation of a glassy phase on the surface of the refractory, and the coating tends to be more efficient at temperatures higher than 800 °C.
- 1-Mar-1999
- InterCeram: International Ceramic Review, v. 48, n. 2, p. 84-88, 1999.
- 84-88
- Clay
- Fluorescence
- Glass transition
- Oxidation
- Protective coatings
- Refractory materials
- Scanning electron microscopy
- Substrates
- Thermal effects
- Thermoanalysis
- X ray diffraction
- Carbon oxidation
- X ray fluorescence
- Ceramic coatings
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/65739
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