Hostname: page-component-784d4fb959-4tbfc Total loading time: 0 Render date: 2025-07-16T08:32:18.893Z Has data issue: false hasContentIssue false
  • English
  • Français

High pressure combustion synthesis of aluminum nitride

Published online by Cambridge University Press:  31 January 2011

Marc Costantino  and
Carlo Firpo
Marc Costantino
Affiliation:
University of California, Lawrence Livermore National Laboratory, Livermore, California 94550
Carlo Firpo
Affiliation:
University of California, Lawrence Livermore National Laboratory, Livermore, California 94550
Get access

Abstract

We report initial results on the synthesis of monolithic aluminum nitride by burning Al–AlN mixtures in high pressure nitrogen. The objective is to synthesize economically large, near-theoretical density AlN parts. In this work, we begin with compacted mixtures of 10 μm Al and 3 μm AlN powder formed into 7.62 cm diameter by 3.81 cm thick disks having densities up to 60% of theoretical. Then, at N2 pressures up to 180 MPa (26 000 psi), we ignite the disk on one face. The fraction of Al converted to AlN, density, and severity of macroscopic cracking vary with N2 pressure and heat transfer from the sample. Presently, products are inhomogeneous, showing regions of relatively high porosity, regions with no porosity but with AlN in a matrix of Al, and regions of nearly theoretical density AlN.

Information

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 11 , November 1991 , pp. 2397 - 2402
Copyright
Copyright © Materials Research Society 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

1.Billy, M. and Mexmain, J., World Ceramics 2, 91 (1985).Google Scholar
2.Taylor, K. M. and Lenie, Camille, J. Electrochem. Soc. 107, 308 (1960).CrossRefGoogle Scholar
3.Long, George and Foster, L. M., J. Am. Ceram. Soc. 42, 53 (1959).CrossRefGoogle Scholar
4.Dunmead, Stephen D., Holt, J. Birch, and Kingman, Donald D., “Simultaneous Combustion and Densification of A1N,” Combustion and Plasma Synthesis of High Temperature Materials, edited by Munir, Z. A. and Holt, J. B. (Springer-Verlag, 1990).Google Scholar
5.Smith, Gordon, private communication.Google Scholar
6.Sychev, V. V., Vasserman, A. A., Kozlov, A. D., Spiridonov, G. A., and Tsymarny, V. A., The Thermodynamic Properties of Nitrogen (Hemisphere Publishing Co., 1987).Google Scholar
7.Novikov, N. P., Borovinskaya, I. P., and Merzhanov, A. G., in Combustion Processes in Chemical Engineering and Metallurgy, edited by Merzhanov, A. G. (Chernogolovka, 1975), pp. 174–188.Google Scholar
8.Poluboyarinov, D. N., Gordova, M. R., Kuznetsova, I. G., Bershadskaya, M. D., and Avetikov, V. G., Neorganicheskie Materialy 15, 2055–2060 (1979).Google Scholar
9.Class, Walter, “An Aluminum Nitride Melting Technique,” NASA CR-1171, Final Report by the Materials Research Corporation for Lewis Research Center under Contract NAS 3–10659.Google Scholar
10.Hirschfelder, Joseph O., Curtiss, Charles F., and Bird, R. Byron, Molecular Theory of Gases and Liquids (John Wiley and Sons, New York, 1967).Google Scholar
11.Chernega, D. F., Mogilatenko, V. G., and Dyatlov, A. P., Soviet Non-Ferrous Met. Res. 13, 456–460 (1985).Google Scholar
12.Karpinski, J. and Porowski, S., J. Cryst. Growth 66, 11 (1984).CrossRefGoogle Scholar