Chemical and Thermal Shock Resistance Properties of Porous Silicon Carbide Ceramics| Chapter 5 | Research Aspects in Chemical and Materials Sciences Vol. 5

 Porous silicon carbide (SiC) potteries have been thought-out as promising candidates as the catalytic support, machinelike seals, hot-vapor and molten-metal filters, vapor turbine structure, heat exchanger tubes, etc. due to their excellent features. In such requests under corrosive atmosphere, the SiC porcelain materials knowing different type of corrosions such as; deposit-inferred corrosion, inactive oxidation, active decay, scale volatility, scale interplays, etc., depending on their composition. SiC stoneware filters can withstand assertive chemical and thermal shock environments during their use, being more favorable than polymeric or metallic materials. Thermal and synthetic resistance features ultimately determine the rightness and service life of potteries for applications in corrosive air. Detailed study on the effect of thermal shock and disintegration in strong acidic/soluble conditions at raised temperature on absorbent SiC ceramics and the microstructure and mechanical feature evolutions of the corroded SiC potteries are still very few. It is always a preferable choice to have earlier information on warm shock and corrosion resistance possessions of any new material before selecting the material for requests in one or more corrosion surroundings. Therefore in this phase it is aimed to review and quantitatively assess various types of thermal and synthetic corrosion at various hotnesses on the microstructure, materials features and flexural strength of porous SiC potteries prepared by differing methods. A brief summary is given on the current state of information on the effect of chemical and warm corrosion, influence of the chemical disintegration conditions (type of seasoning, acid/alkali, temperature, pressure, etc) and warm shock resistance (chilling/heating as a function of quenching temperatures and quenching phases, etc) on the material and mechanical features.

Author(s) Details:

Dulal Das,
CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata-700 032, India.

Nijhuma Kayal,
CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata-700 032, India.

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