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The Recycling and Reclamation of Metal-Matrix Composites
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Abstract
The recycling and reclamation of metal-matrix composites (MMC's) are critical aspects of the commercialization process. By recycling, we mean the economic processing of MMC scrap for reuse as composite. Reclamation refers to the separation and recovery of the individual components of the composite, i.e., the various aluminum alloys and ceramic particles.
Three forms of MMC wrought alloy scrap have been considered; i.e., D. C. (direct chill) cast log ends, extrusion butts, and cut extrusion scrap. Recycling each of these forms of scrap back into D. C. cast extrusion billet has been demonstrated. This has been accomplished by recycling the scrap back through the basic mixing process. Various ratios of scrap to virgin composite have been explored and optimum blends are being studied. Similarly, for MMC foundry alloy (high silicon) gates and risers produced in shape-casting, fluxing and degassing techniques have been developed so these may be recycled back into useful castings. These fluxing and degassing processes have been confirmed at commercial foundries and are described in detail. Finally, when MMC scrap can no longer be recycled, the alumina particles in the wrought alloys, or the silicon carbide particles in the foundry alloys may be removed by common salt or other fluxing techniques. Methods are used which are similar to the way oxide films or insoluble “dirt” are removed from ordinary aluminum. Rotary salt furnace (RSF) technology has been shown to be effective for this approach and the results of large RSF trials are reported.
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Schuster, D., Skibo, M., Bruski, R., Provencher, R. et al., "The Recycling and Reclamation of Metal-Matrix Composites," SAE Technical Paper 930182, 1993, https://doi.org/10.4271/930182.Also In
References
- Brooke L. Kobe G. Sawyer C.A. “Recyclability” Automotive Industries September 1990 4
- Kiser K. “Total Car Recycling” Scrap Processing and Recycling September October 1992 42
- “Recycling and the Automobile” Automotive Engineering October 1992 41
- Geiger A. L. Walker J. A. “The Processing and Properties of Discontinuously Reinforced Aluminum Composites” Journal of Metals August 1991 8
- Schuster D.M. Skibo M.D. Hoover W.R. “Production and Semi-Fabrication of an Aluminum Composite Material” Light Metal Age February 1989 15
- Mortensen A. Jin I. “Solidification Processing of Metal Matrix Composites” International Materials Reviews 1992 37
- Cornie J. A. Moon H. K. Flemings M. C. “A Review of Semi-Solid Slurry Processing of Al Matrix Composites” Proceedings of Fabrication of Particulate Reinforced Metal Composites Montreal, Quebec September 17 1990 63
- Schuster D.M. “The World Won't Beat A Path To Your Door” Second ASM Paris Conference: Synthesis, Processing, and Modelling of Advanced Materials Paris, France September 11 1991 337
- Dixon W. “Extrusion of Particulate-Reinforced Aluminum Based Metal Matrix Composites” Proceedings of Fifth International Aluminum Extrusion Technology Seminar Chicago, Illinois May 19 1992 429
- Skibo M. D. Schuster D.M. “Process for Production of Metal Matrix Composites by Casting” July 26 1988
- Skibo M.D. Schuster D.M. “Process for Preparation of Composite Materials Containing Nonmetallic Particles In A Metallic Matrix” November 22 1988
- Holcomb S. “Effect of Spinel Formation on Mechanical Properties of Alumina Particulate-Reinforced Aluminum Composites” Proceedings of 31st Conference of Metallurgists Edmonton, Alberta August 23 1992
- Lloyd D.J. Lagacé H. P. McLeod A.D. Controlled Interphases in Composite Materials ICCI-III Ishida H. 1990 359
- McLeod, A.D. “Kinetics of the Growth of Spinel, MgAl 2 O 3 , in Alumina-Containing Aluminum-Magnesium Alloy Matrix Composites” Masounave J. Hamel F. G. ASM International, Materials Park, Ohio 1990 17
- DURALCAN Composite Casting Guidelines Duralcan USA San Diego, CA October 1990
- Ribes H. Svéry M. L'Espérance G. Legoux J.G. “Microscopic Examination of the Interface Region in 6061 -Al/SiC Composites Reinforced with As-Received and Oxidized SiC Particles” Met. Trans. A 21 September 1990 2489
- Iseki T. Kameda T. Maruyama T. Journal of Materials Science 19 1984 1692
- Lloyd D.J. Chamberland B. Proc. Int. Symp. on Advances in Cast Reinforced Metal Composites Chicago, IL September 24-30 1988 Fishman S.G. Dhingra A.K. ASM International, Metals Park, OH 1988 263
- Hammond D.E. “Castable Composites Target New Applications” Modern Casting September 1990
- Riverin G. “ DURALCAN Scrap Reclaiming - Aluminum Recovery from DURALCAN Scrap Using Rotary Salt Furnace Technology (RSF)” Alcan International Limited, Arvida Research Report December 1992