Investigation of physical, mechanical and tribological properties of Al6061–ZrO2 nano-composites

Abstract

The present investigation mainly concentrates on work done in order to explore physical, mechanical & tribological characteristics of Al6061 alloy reinforced with nano-sized zirconium dioxide particulates. Four casts of different percentages of reinforcement from 0 to 6 wt% in the steps of 2 are fabricated using liquid metallurgy technique (stir casting). The prepared composites later subjected to various physical, mechanical & wear tests and results were studied. The tests were carried out in accordance with the ASTM standards on the alloy and nano-composites. In the present investigation the physical and mechanical properties like density, hardness and tensile strength increased significantly with the increase in percentage of reinforcement in the matrix alloy, while the percentage elongation found to be decreased. The sliding wear tests were performed by using pin-on-disc the tribometer and results indicated that wear resistance of composites was higher. Off the four compositions, there were improved properties of composites with higher weight percent of reinforcement. Scanning Electron Microscope (SEM) micrographs was used after tensile testing to study fractured surfaces of specimens and wear morphology after wear testing. Overall the investigational outcomes are very interesting and motivates to do further more research.

Influence of ZrO2 Particles on the Tribological Properties of AlMg5 Alloy

“…The trend owes to many factors such as: (i) the surface deformation,(ii) removal of load bearing particles (ZrO2), (iii) increasing the friction due to the higher contacting couple surface and , faster generation , removal of the tribo-layer and rising the temperature of the surface with increasing the applied load, producing a soft surface. A similar result was obtained by many authors [15,30]. However, the wear resistance of the composites up to 10 wt.% of ZrO2 increases when compared with the base matrix.…”

“…Their outcomes showed the highest wear resistance was obtained with matrix has 3% ZrO2. Kumar et al [15] manufactured A6061/ZrO2 nano composite via stirring casting process. Wear test results showed that wear resistance of the MMCs improved as the content of nano-reinforcement increased.…”

Efecto de la cantidad de ZrO 2 sobre las propiedades mecánicas de los compuestos de aluminio reforzados con ZrO 2 producidos por la técnica de infiltración al vacío

“…Therefore, the increase in the ZrO 2 reinforcement ratio in the composite structure led to gradual decrease in the wear losses. Similar results are reported in the studies in the literature (Ramachandra et al, 2015;Karthikeyan and Jinu, 2015a;Karthikeyan and Jinu, 2016;Madhusudhan et al, 2016;Pandiyarajan et al, 2017;Veeresh Kumar et al, 2019). In another study in the literature, it was stated that the oxide formed at the matrix-reinforcing interface plays an important role in reducing both the friction coefficient and the amount of wear (Karthikeyan and Jinu, 2015b).…”

Wear and Friction Behavior of Gr/Sn Solid Lubricated Dual Reinforced AMCs

“…Most of the research groups have investigated the properties of AMCs by incorporating (i) synthetic and (ii) natural reinforcement. Synthetic ceramic compounds such as SiO 2 [7], ZrO 2 [8], SiC [9], B 4 C [10], Al 2 O 3 [11], etc., as reinforcement have shown an excellent wear resistance of Alalloy matrix composites [12]- [14]. At the same time, natural minerals like rutile [15], garnet [16], zircon [17] etc.…”