The use of materials other than steel in bearing liners lead to many problems associated with variations in thermal expansion coefficients. The use of an aluminum matrix composite minimized this problem because adding ceramic reinforcements to the aluminum matrix reduces the expansion coefficient to that of the steel. In addition, the ceramic increases the elastic modulus and increases the wear resistance. This proposal uses a new spherical alumina as the reinforcement for ease of machining in addition to the other properties.
Benefit: This work will demonstrate the use of this new material as bearing liners, bearing mounts, valve guides and other applications where reduced thermal expansion and wear resistance are primary properties.
Keywords: High Strength, High Strength, thermal expansion coefficient, elastic modulus, Aluminum Matrix Composites, wear resistance, fatigue resistance
