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Plastic Deformation of Silicon Nitride Nano-Ceramics
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Synthesis and Microstructural Evaluation of SiC-AlN Composites
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Preparation and Properties of Spark Plasma Sintered AlN/BN Nano-Composites
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Bonding and Integration of Silicon Carbide Based Materials for Multifunctional Applications
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Formation and Sintering Mechanisms of Reaction Bonded Silicon Carbide-Boron Carbide Composites
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Sintering Mechanism of Fine Zirconia Powders with Alumina Added by Various Ways
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Preparation and Properties of Spark Plasma Sintered AlN/BN Nano-Composites

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Abstract:

Nano-sized turbostritic-BN (t-BN) was fabricated through chemical process using boric acid and urea in this work. By the same method, the AlN powders coated with nano-BN were prepared too. The results of X-ray diffraction (XRD) and transmission electron microscope (TEM) revealed that nano-sized t-BN was synthesized at about 600°C in nitrogen gas and it surrounded the surface of AlN particles. High-density AlN/BN nano-composites were fabricated spark plasma sintering (SPS). Microstructure and properties of AlN/BN nano-composites (5~30vol% BN) were investigated. The h-BN flake particles were homogenously dispersed at AlN grain boundaries and within grains in the AlN/BN composites. A little nano-BN additions significantly improved the bending strength of the nano-composites. However, the bending strength was decreased with the BN content increasing. The thermal conductivity of AlN/BN nano-composites was investigated too.

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Periodical:

Key Engineering Materials (Volume 352)

Pages:

197-200

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.352.197

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Online since:

August 2007

Authors:

Mei Juan Li, Lian Meng Zhang, Z.D. Wei, Qiang Shen, Dong Ming Zhang

Keywords:

AIN/BN Nano-Composite, Spark Plasma Sintering (SPS), Thermal Conductivity (TC)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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