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Tribo-Surface Characteristics Of Al-B4c And Al-Sic Composites Worn Under Different Contact Pressures
Tribo-Surface Characteristics Of Al-B4c And Al-Sic Composites Worn Under Different Contact Pressures
A.S. Md Abdul Haseeb
Tribo-surface characteristics of two aluminium metal matrix composites (Al-MMC) of compositions Al-13 vol%B4C and Al-13 vol%SiC sliding against a commercial phenolic brake pad have been investigated under dry conditions. The wear tests were carried out using a pin-on-disc type apparatus at a linear speed of 1.62 m s-1 under contact pressures ranging from 0.75 to 3.00 MPa. The coefficient of friction was recorded on line. Wear rates were calculated from mass loss measurements. Scanning electron microscope equipped with energy dispersive X-ray spectroscopy was used to examine the tribo-surface. It is found that wear rate of both composites increases with increasing …
Chemical And Structural Nature Of Tribo-Surface Of Aluminium-Sic Composites At Nanometre And Micrometre Length Scales
A.S. Md Abdul Haseeb
The worn surface of Al-SiC metal matrix composites (MMC) sliding against phenolic brake pad at a linear sliding speed of 1.62 m s-1 under contact pressures of 0.75-3.00 MPa in a pin-on-disc apparatus was investigated. XPS was used to extract information from the top few nanometres of the worn surface, while scanning electron microscopy and energy dispersive X-ray microanalysis (SEM-EDX) provided information from within a few micrometres. Results reveal that the surface of Al-SiC undergoes significant chemical and physical changes during wear. The tribo-surface on Al-SiC is converted into a mixture that contains the constituents of Al-SiC and the phenolic …