Fabrication and Properties of Machinable AlN-BN Ceramic Nanocomposites

Abstract:

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The AlN/h-BN nanocomposite powders were synthesized through the reaction of AlN powder, boric acid (H3BO3) and urea (CO(NH2)2) in a nitrogen atmosphere, and the machinable AlN/BN ceramic nanocomposite s were fabricated by hot-pressing in N2 atmosphere. The existing and distribution of h-BN phase are revealed by X-ray diffraction (XRD), TEM and SEM. For the existing of weak interface between h-BN and AlN grains, the machinability of AlN/BN composites is improved obviously. For the finer microstructures, the mechanical properties and the machinability of the composites with micrometer sized AlN coated with nano-sized BN are better than the AlN/h-BN composite of mechanical mixing type.

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

637-640

DOI:

10.4028/www.scientific.net/KEM.317-318.637

Citation:

H. Y. Jin et al., "Fabrication and Properties of Machinable AlN-BN Ceramic Nanocomposites", Key Engineering Materials, Vols. 317-318, pp. 637-640, 2006

Online since:

August 2006

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Price:

$35.00

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