1. Metal matrix composites
1.1 Nomenclature
To rationalize the numerous notations used by manufacturers, the ANSI H35.5-1992 standard proposes the following notation, initially used by Aluminium Association:
Alloy / Reinforcement / Volume fraction Form (particles p or fibers f )-Heat treatment.
For example, a composite marked A 356/ SiC/ 20p-T6 has an A 356 aluminum alloy matrix, reinforced with 20% (by volume) silicon carbide particles, and has undergone a T6 treatment.
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Metal matrix composites
Obtaining CMMp by powder metallurgy
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Costs
Today, the cost of reinforcing particles is highly variable, with a downward trend in prices. For example, a pound (= 0.454 kg) of particles can vary from 2 to 40 Canadian dollars, depending on the nature and size of the particles, whereas a pound of processed aluminum (finished parts) used to cost only 1 to 2 dollars, depending on the alloy and, above all, the quantity. We need to keep a close eye on the price of aluminum, which...
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