Effects of Rice Husk Ash–Magnesium Oxide Addition on Wear Behavior of Aluminum Alloy Matrix Hybrid Composites

Abstract

A336.0 aluminum alloy used to fabricate hybrid composites using rice husk ash (RHA) and MgO particles as reinforcement. The influence of the particles on the wear behavior of A336.0 aluminum alloy as a matrix that reinforced with MgO and RHA was investigated. Firstly, the rice husk burned at 700°C and then heat treated at 1100°C for 2 hrs. The ash characterized by X-ray florescence and X-ray diffraction. Less than 53 and 125 micron are the particle sizes of MgO and RHA respectively. The hybrid composites manufactured using stir casting method in two steps. A336.0 aluminum alloy reinforced with 4:0, 3:1, 2:2, 1:3 and 0:4 of RHA: MgO with 10 wt% total reinforcement phase. Optical microscope and X-ray diffraction were used to characterize the prepared hybrid composites. Dry sliding wear, hardness, apparent density, percentage of porosity and coefficient of friction were examined. Results indicated that porosity, apparent density and hardness enhanced with increasing MgO, while increasing wt% of RHA decreased the apparent density. Results indicated that with inceasing the applied load the wear rate of the composites was enhanced. Coefficient of friction varies inversely with applied load and wt% of RHA. Hardness increased with increasing RHA while the friction coefficient and the wear rate decreased. The minimum wear rates were at 10% RHA and Al-alloy-(RHA-MgO) [3:1] composites, while the minimum friction coefficients were at 10% RHA composites.

Influence of Cow Horn Particles on the Hardness and Impact Properties of the Reinforced Recycled Aluminium Alloy

“…As the weight ration of reinforcement increases the hard surface increases and the grain size of the matrix reduces thereby causing more resistance to plastic deformation and hence, increase in hardness of the composite. This was similarly observed by Saravanana and Kumarb, and Abbas Y. Awad et al in their studies of Aluminium alloy matrix reinforced with rice husk ash [6,21].…”

Distilled spirits lees ash as cement additive

“…Considering the high concentration of silica in rice husk, which is a common component of DSL, proper combustion conditions can result in the production of a high pozzolanic material known as rice husk ash. It has been shown to have pozzolanic effects and can be used as a cement additive in previous studies (Jauberthie et al 2003;Saraswathy and Song 2007;Chindaprasirt and Rukzon 2008;Nair et al 2008;Zerbino et al 2011;Awad et al 2018).…”