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Repeated impact by solid particles causes erosion and degradation of engineering components. In internal combustion engines, during combustion, hot gases are generated in large quantity which causes erosion of cylinder, combustion chamber, exhaust system, etc. In this work, two types of plasma sprayed coating systems were developed on Al-6061 substrate. For each system, a systematic microstructural...
It is a well-known fact that materials that consist of both brittle and ductile constituents can show erosion behavior in either a ductile or a brittle manner. The high-velocity oxy-fuel (HVOF) sprayed WC-Co/NiCrFeSiB coatings on GrA1 boiler tube steel exhibit composite ductile and brittle modes of erosion under angular silica sand erodent of size 125–180μm impacted at 40m/s. The HVOF spraying leads...
A series of polyamides (PAs), namely, PA 6, PA 66, PA 66/610, PA 11, PA 12 and aromatic PA (brittle, hard and amorphous) was selected for investigating the effect of chemical structure and hence, mechanical properties on erosive wear behavior by impinging silica sand particles of 90-180μm size at various angles and dozes. The results indicated that five polyamides including brittle PA showed maximum...
There is a growing interest on the use of thermal spray coatings for a variety of wear resistance applications due to the several advantages it offers. WC-Co coating is widely used for wear resistance applications. It is known that addition of Cr to WC-Co improves binding of the metallic matrix with the WC grains and provides better wear resistant coating. Thus, WC-Co-Cr is considered to be a potential...
The sliding friction and wear behaviour of aluminium (Al), aluminium alloy 7075 (Al-7075) and SiC particulate reinforced aluminium matrix composites (Al-SiC) have been investigated under dry sliding wear conditions. The wear tests were carried out at a sliding speed of 1m/s and at normal load ranging up to 220N. The overall objective of the study is to improve our current understanding with regard...
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