Erosive wear response of SiCp reinforced aluminium based metal matrix composite: Effects of test environments

Abstract

In the present investigation, the erosive wear behaviour of a 10 wt.% SiC particles reinforced aluminium based metal matrix composite has been studied. The composite was fabricated by dispersing SiC particles of size 50-100 µm into the matrix alloy. The resulting material cast was characterised in terms of microstructure, hardness and erosive wear behaviour. The wear response was examined by the sample rotation technique using the slurry pot erosion tester. The effects of speed, sand content and slurry environment on the slurry wear behaviour have been studied. It was observed from the microstructural studies that the interfacial bonding strength between the aluminium matrix and the SiC particles was good and the particles were distributed uniformly. Moreover, in basic medium matrix alloy exhibited a minimum wear rate compared to the composite whereas in the case of an acidic and saline medium, an improved wear resistance was obtained in the case of the composite. The rate of material loss is found to be higher with the increased sand concentration due to the increased impinging action of the sand particles. Also, the rotational speed has a mixed effect on the wear rate. It can be concluded that the material loss was caused by the synergistic effect of corrosive, erosive and abrasive actions of the slurry medium although in the acidic medium, erosion was the dominant mode of material removal whereas corrosion was dominant in the case of a basic medium.

Damping properties of nickel-added modified zinc alloys

“…The coefficient of thermal expansion (CTE) values for the ZA matrix and Ni were 26   C & .  /C respectively. Due to the large difference in the CTE values, dislocations were generated in the alloy during cooling from the high fabrication temperatures and subsequent thermal loading [16]. These dislocations generated to accommodate the residual thermal stresses are located primarily near the interface, and their density decreases with the increase in distance from the interface [17].…”

Abrasive wear behaviour of aluminium hybrid nanocomposites produced by ultrasonication assisted casting method

“…However, the high cost associated with the presently available MMCs remains a major barrier to their widespread use. Aluminium alloys reinforced with micro-ceramic particulates generally referred as Al-metal matrix composites (Al-MMCs) are gaining widespread attractiveness in several engineering fields due to their better mechanical and wear resistance properties compared to their unreinforced counterparts [6][7][8][9]. Nowadays, Al-MMCs are being used as base materials in several applications such as pistons, pushrods, cylinder liners, and brake discs.…”

“…The attractive features of metal matrix composites have influenced their use in automobile brake pad applications [16]. The erosive wear behaviour of SiC particulates reinforced with Al-metal matrix composites was systematically analysed by Khan and Dixit [17]. However, the above works have mainly focused on the effect of micron-sized particulates on metal matrices.…”

Non-destructive tests on eco-friendly anti-corrosion paint

“…Aluminium has been utilised in this work since it is the most reactive metal and has the special property of forming strong bonding to a passivating oxide film on the aluminium surface [1]. Currently, the utilisation of aluminium in industries is very vast [2] due to its properties like low specific gravity, corrosion resistance and recyclability [3][4][5]. Corrosion problems lead to the failure of structures such as bridges, buildings, aircrafts, automobiles and gas pipelines [6][7][8][9].…”