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Wear of etched near-eutectic aluminium–silicon alloy slid against a steel ball under ambient is explored. The sliding velocity is kept low (0.01m/s) and the nominal contact pressure is varied in a 15–40MPa range. Four stages of wear are identified; ultra mild wear, mild wear, severe wear and post severe oxidative wear. The first transition is controlled by the protrusions of silicon particles, projecting...
A cathodic arc plasma deposition system (with variation of the O 2 /N 2 flow ratio) was used to synthesize different Ti–N–O films on the AISI 304 stainless steel. The coating morphologies and structures were analyzed by using SEM, XRD, and TEM. The coating properties, such as adhesion, hardness, elastic modulus, and wear behavior, were explored to evaluate the impact of the O 2...
Thin hard coatings are generally used for surface enhancement. However, it was theoretically predicted that thin hard coatings may have a weakening effect of reducing the resistance to onset of plasticity in coating/substrate systems. Such weakening effect may also deteriorate the wear property of a coated system. In this study, we report a direct experimental validation of the weakening effect. Spherical...
The dry sliding wear behavior and mechanisms in a bulk metallic glass composite, Ti48Zr20V12Cu5Be15, composed of in situ crystalline dendrites in an amorphous matrix, was studied in reciprocating mode against a WC counterface loaded at 5N and 10N. The composite showed higher wear rates but lower coefficient of friction compared to a monolithic fully amorphous glass. Nanomechanical characterization...
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