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|Title:||In-situ reaction sintering of porous mullite-bonded silicon carbide, its mechanical behavior and high temperature applications|
|Publisher:||AMER CERAMIC SOC|
|Citation:||MECHANICAL PROPERTIES AND PROCESSING OF CERAMIC BINARY,TERNARY, AND COMPOSITE SYSTEMS,29(2)127-140|
|Abstract:||The purpose of this work was to study reaction bonding technique as an effective way to produce porous silicon carbide ceramics. These can be tailored to have near-zero dimensional change while sintering, high service temperature under load and excellent thermal shock resistance. Sintered porous mullite-bonded silicon carbide was produced having an open porosity of 20-25%. XRD and SEM were used to confirm formation of the mullite phase and to Study the sample microstructure. Rectangular bars of the material made using the slip-casting method were tested for thermal shock resistance as a function of the critical quench temperature difference the samples could withstand. Cyclic quench tests carried out from 1000 degrees C to 5 degrees C showed a loss in elastic (Young's) modulus of the order of 40% of the initial value in the first 6-8 cycles. Further thermal cycling did not have a significant influence on the elastic modulus. The possibility of the use of porous mullite-bonded silicon carbide in various metal-melting/casting applications has been investigated.|
|Appears in Collections:||Proceedings papers|
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