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Characterization of High Temperature Properties in Al Matrix Composite Fabricated by the Low Pressure Squeeze Infiltration Process
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Abstract
Al matrix composites containing alumina (Al2O3) fibers are fabricated by the low pressure (25MPa) squeeze infiltration process which is suitable for the low cost mass production. Mechanical properties at room temperature as well as elevated temperatures (250°C, 350°C) are improved due to the presence of reinforcements. Upto 350°C, composites maintain a reasonable strength, which is much better than strength of the conventional Al alloy. Composites have equivalent wear rates to those of Ni - resist cast iron. Wear behavior is changed with the sliding speed. At low sliding speed, wear proceeds by the excessive failure of matrix and fiber, whilst, at higher sliding speed, matrix fracture near fiber plays a major role in wear. Wear resistance of 125°C is inferior to that of room temperature due to the reduction of mechanical properties followed by matrix softening and poor bonding. Al matrix composite possesses enough mechanical and tribological properties to be applied as an material for engine components.
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Citation
Lee, B., Park, Y., Park, K., and Lim, T., "Characterization of High Temperature Properties in Al Matrix Composite Fabricated by the Low Pressure Squeeze Infiltration Process," SAE Technical Paper 940809, 1994, https://doi.org/10.4271/940809.Also In
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