Microstructures and Properties of In Situ Nonoxide-Boron Nitride (Nobn) Composites

Zhang, G.J.; Ohji, Tatsuki

doi:10.4028/www.scientific.net/kem.206-213.1037

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2003

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“…Si 3 N 4 -SiC-BN ternary system composites can also be produced from the above reaction [20]. Very recently, we reported the results on the preparation of AlN-BN, Alon-BN and Si 3 N 4 -BN composites based on the nitridation of AlB 2 and SiB 6 [21][22][23]. In this article, the preliminary results on in situ Sialon-BN porous composites will be reported.…”

Section: Introductionmentioning

confidence: 94%

SiAlON-Boron Nitride Porous Composites: In Situ Synthesis, Microstructure and Properties

Zhang

Yang

Ando

et al. 2003

KEM

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Sialon-boron nitride porous composites were prepared based on the in situ nitridation of AlB 2 to form AlN and BN in Si 3 N 4 and Al 2 O 3 in this work. The fabricated composites by pressureless sintering at 1800°C for 2 h under N 2 atmosphere of 8 atm show closed type pores and demonstrate relatively high bending strength by comparison with that of conventionally processed composites. In addition, due to the large volume expansion of 226% during the nitridation process of AlB 2 , Sialon-BN composites with low-shrinkage in the reaction synthesizing process are obtained.

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