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Developments in the processing and properties of particulate Al-Si composites

“…9,12 The most cost-effective methods are currently casting 4,13 and powder metallurgy (P/M). 9,14 Since the introduction of AMCs in commercially available quantities, both methods, as well as new techniques, are refocusing directly on net-shape products.…”

“…9,12 The most cost-effective methods are currently casting 4,13 and powder metallurgy (P/M). 9,14 Since the introduction of AMCs in commercially available quantities, both methods, as well as new techniques, are refocusing directly on net-shape products. 6,8,[15][16][17][18] Most of the work in this emerging front has used Al-Si alloys as the base material, most commonly the hypereutectic, hypoeutectic, and A356 alloys.…”

“…The addition of ceramic particulate to these alloys increases stiffness, high-temperature strength, and wear resistance at ambient temperature 44 while the use of graphite (or carbonaceous precursors) and mica lend it to reduced friction applications such as bearings, solid lubricants, and braking components. 9,45,46 Al-Si ALLOY Al-Si alloys comprise 85% to 90% of the total aluminum-cast parts produced. 47 The compositions of most common casting alloys are summarized in Table I.…”

“…This flexibity in component casting and heat treatment, the ability to refine the melt grains and modify the structures, and their applications properties are among the factors that make Al-Si alloys attractive. Various methods and designs are now being used 8,9,38,39,55 to harness and improve on these advantages in the synthesis of composite materials.…”

Workability and mechanical properties of ultrasonically cast Al–Al2O3 nanocomposites

“…Researchers are, recently, turning to particulate-reinforced aluminum-metal matrix composites (AMCs) because of their high strength to weight ratio, long fatigue life, and improved thermal stability, low cost and reasonably isotropic properties [1][2][3][4] especially in those applications, where extreme loading or thermal conditions are not required. Besides, the mechanical properties the workability of AMCs is essential for the fabrication of any component for practical uses, such as automotive components, transportation and construction.…”