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Effects of MoSi2 and Si3N4 on Performance of Sintering and Antioxidation of AlN-ZrO2 System Composites

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Abstract:

AlN-ZrO2 system composites were prepared with Ca-stabilized zirconia (Ca-PSZ, particle size d50=29.3 μm) and AlN power (d50=0.5 μm) as raw material, MoSi2 (d50=2 μm) and Si3N4 (d50=44 μm) as additives respectively, in N2 atmosphere by pressureless sintering at 1600 °C. The phase compositions were investigated by XRD. The sintering performance of the composites was measured by the checking of the bending strength and the apparent porosity of samples. The anti-oxidation performance of the composites was analyzed by the checking of oxidation weight increased of samples. The results showed that phase compositions of the composites consisted of ZrO2, ZrN, CaAl12O19 and CaAl2Si2O8when the content of AlN was 8 wt %. The additives promoted the sintering of AlN-ZrO2 system composites. As a result, introduction of the additives increased the oxidation of the composites due to oxidation expansion of phases ZrN.

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Periodical:

Advanced Materials Research (Volumes 602-604)

Pages:

107-110

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.602-604.107

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Online since:

December 2012

Authors:

Bin Feng, Rong Lin Wang, Guang Na Wu, Jing Long Bu

Keywords:

Aluminum Nitride (AlN), Composite, Molybdenum Disilicide, Silicon Nitride, Zirconia

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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