Erosive wear properties of ZA-27 alloy-based nanocomposites: Influence of type, amount, and size of nanoparticle reinforcements

Friction

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[1] 0000 0001 0118 0988, grid.4994.0, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 61669, Brno, Czech Republic;0000 0001 0708 5391, grid.7858.2, Faculty of Mechanical Engineering in Skopje, Ss. Cyril and Methodius University, Karposh II bb, 1000, Skopje, Macedonia;0000 0001 2166 9385, grid.7149.b, Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120, Belgrade, Serbia;0000 0001 2166 9385, grid.7149.b, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000, Belgrade, Serbia;0000 0001 2166 9385, grid.7149.b, Institute of Nuclear Sciences “Vinca”, University of Belgrade, Mike Petrovića Alasa 12-14, 11001, Belgrade, Serbia;0000 0004 0438 9594, grid.6981.6, Faculty of Industrial Technology, Technical University of Sofia, 8 Kliment Ohridski Blvd, 1000, Sofia, Bulgaria;

关键词: ZA-27 alloy;    nanocomposites;    nanoparticles;    compocasting;    fractography;    erosive wear;   

DOI  :  10.1007/s40544-018-0222-x

来源: publisher

【 摘 要 】

Metal matrix nanocomposites (MMnCs) comprise a metal matrix filled with nanosized reinforcements with physical and mechanical properties that are very different from those of the matrix. In ZA-27 alloy-based nanocomposites, the metal matrix provides ductility and toughness, while usually used ceramic reinforcements give high strength and hardness. Tested ZA-27 alloy-based nanocomposites, reinforced with different types (SiC and Al2O3), amounts (0.2 wt.%, 0.3 wt.%, and 0.5 wt.%) and sizes (25 nm, 50 nm, and 100 nm) of nanoparticles were produced through the compocasting process with mechanical alloying pre-processing (ball milling). It was previously shown that the presence of nanoparticles in ZA-27 alloy-based nanocomposites led to the formation of a finer structure in the nanocomposites matrix and an improvement in the basic mechanical properties (hardness and compressive yield strength) through the enhanced dislocation density strengthening mechanism. Solid particle erosive wear testing demonstrated that these improvements were followed with an increase in the erosive wear resistance of tested nanocomposites, as well. Additionally, by analyzing the influences of type, amount, and size of nanoparticles on the erosive wear resistance of nanocomposites, it was demonstrated that there is an optimal amount of nanoparticles, which in our case is 0.3 wt.%, and that the presence of SiC nanoparticles and smaller nanoparticles in nanocomposites had more beneficial influence on erosive wear resistance.

【 授权许可】

CC BY