| Issue |
J. Phys. Colloques
Volume 48, Number C3, Septembre 1987
4th International Aluminium Lithium Conference
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|
|---|---|---|
| Page(s) | C3-347 - C3-353 | |
| DOI | https://doi.org/10.1051/jphyscol:1987340 | |
J. Phys. Colloques 48 (1987) C3-347-C3-353
DOI: 10.1051/jphyscol:1987340
METAL MATRIX COMPOSITES BASED ON ALUMINIUM LITHIUM AND SILICON CARBIDE
J. WHITE, I.R. HUGHES, T.C. WILLIS et R.M. JORDANAlcan International Ltd, Southam Road, Banbury, GB-Oxon OX16 7SP, Great-Britain
Abstract
The present study tests the feasibility of producing metal matrix composites based on aluminium-lithium alloys. The first step in this process has been to produce an MMC based on 8090 with SiC. This has been successfully produced by Alcan International using the "Osprey" spray deposition process. The raw billets have been processed initially by extrusion. The tensile properties of this material have been determined and the strength compares favourably with DC cast alloys. Modulus is improved to ≈ 100 GPa with acceptable ductility. Density has been measured as 2.62 Mg/m3. The stiffness to density ratio of the composite is 18% greater than 8090 and 50% greater than conventional aluminium alloys. The results of the study demonstrate the feasibility and potential of Al-Li based- particulate reinforced composite materials.