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Compositional and thermal effects on chemically processed AlN–BN nanocomposite powders

Published online by Cambridge University Press:  03 March 2011

G.M. Chow ,
T.D. Xiao ,
X. Chen  and
K.E. Gonsalves
G.M. Chow
Affiliation:
Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375
T.D. Xiao
Affiliation:
Connecticut Advanced Technology Center for Precision Manufacturing, University of Connecticut, Storrs, Connecticut 06269
X. Chen
Affiliation:
Polymer Science Program, Institute of Materials Science and Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269
K.E. Gonsalves
Affiliation:
Polymer Science Program, Institute of Materials Science and Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269
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Abstract

Powders of nanocrystalline aluminum nitride (AlN) and boron nitride (BN) were prepared via a chemical route. Precomposite gels, which were obtained from ammonolysis of aqueous solutions of boric acid, urea, and aluminum chloride hexahydrate, were thermally processed to produce AlN-BN nanocomposite powders with a wide range of compositions. These powders were characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The structure, morphology, and crystallite size of the powders are correlated with the compositions and processing temperature. Normal and abnormal grain growth are discussed.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 1 , January 1994 , pp. 168 - 175
Copyright
Copyright © Materials Research Society 1994

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References

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