Erosive wear properties of ZA-27 alloy-based nanocomposites: Influence of type, amount and size of nanoparticle reinforcements
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Date
2019-07-01
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Mark
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Tsinghua University Press
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Abstract
Metal matrix nanocomposites (MMnCs) consist of a metal matrix filled with nano-size
reinforcements featuring physical and mechanical properties very different from those of the matrix. In ZA-
27 alloy-based nanocomposites metal matrix provide 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, 0.3 and 0.5 wt. %) and sizes (25, 50 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 improvement
of the basic mechanical properties (hardness and compressive yield strength), through the enhanced
dislocation density strengthening mechanism. Erosive wear testing showed that these improvements were
followed with the increase of the erosive wear resistance of tested nanocomposites, as well. Additionally,
by analysing the influences of type, amount and size of nanoparticles on the erosive wear resistance of
nanocomposites, it is shown that there is an optimal amount of nanoparticles, which in our case is 0.3 wt. %,
and that the presence of SiC nanoparticles, as well as, presence of smaller nanoparticles in nanocomposites
showed more beneficial influence on erosive wear resistance.
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Friction. 2019, vol. 7, issue 4, p. 340-350.
https://link.springer.com/article/10.1007/s40544-018-0222-x
https://link.springer.com/article/10.1007/s40544-018-0222-x
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Peer-reviewed
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en