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Materials Science in Additive Manufacturing Cold spray additive manufacturing of Cu-based materials

[46]
Figure 13. Scanning electron microscopy micrographs and powder size distributions of (A) Cu-5CNT, (B) Cu-5CNT-10AlN, and (C) Cu-5CNT-20AlN .
(Reprinted from Journal of Alloys and Compounds, 650, Pialago, E. J. T., Kwon, O. K., Kim, M.-S., and Park, C. W., Ternary Cu–CNT–AlN composite
coatings consolidated by cold spray deposition of mechanically alloyed powders, 199 – 209, 2015, with permission from Elsevier).
Therefore, due to this density, the deposition of SiC and and 156.911 W/m-K, respectively, at 50°C increased
Al O was good enough as compared to the tungsten to 209.407 W/m-K and 213.482 W/m-K after the heat
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carbide particles during the cold spray process. The ceramic treatment of these cold-sprayed coatings. Therefore, the
content of copper-SiC and copper-Al O coatings on an merits of copper-alumina coatings seem to be better, but
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average reported was 7.5 + 3.2 vol.% and 10.5 + 2.7 vol.%, a thorough research on copper-SiC coatings might bring
respectively. The wear rate of pure copper coatings was their characteristic properties into light and prove their
289.57 × 10 mm /Nm and the reported wear rates for commercial importance .
[47]
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copper-SiC and copper-Al O cold-sprayed coatings
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were 207.42 × 10 mm /Nm and 70.88 × 10 mm /Nm, 4.4. Copper-graphene coatings
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respectively. The microhardness values reported for copper- Graphene is a wonder material, having excellent electrical
SiC and copper-Al O were 167.36 Hv and 165.01 Hv, conductivity, thermal conductivity, and mechanical
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which were higher as compared to the cold-sprayed copper strength [48,49] . Good quality graphene can be produced
coatings around 159.55 Hv. Again, the nanohardness values by chemical vapor deposition (CVD) method .
[50]
of copper-SiC and copper-Al O coatings are 2.18 GPa and Graphene nanoplates (GNPs) are widely used in the
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2.28 GPa, respectively, which are higher than that of pure production of metal matrix composites as they can be
copper coatings around 2.06 GPa. Furthermore, according manufactured economically and in large quantities .
[51]
to Chen et al., the wear mechanism of pure copper and Yin et al. produced GNP-reinforced copper matrix
[52]
copper-SiC coatings is adhesive in nature, whereas the coatings intending to improve anti-friction performance.
copper-Al O coatings have an abrasive wear mechanism As reported, ball milling of copper and GNP powders
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due to the high bond strength between copper-alumina was done; thus, copper-GNP (1 vol.%) powder feedstock
particles. Furthermore, the thermal conductivities of was produced. The feedstock was then cold sprayed on
copper-SiC and copper-Al O which were 164.388 W/m-K an aluminum substrate. Then, a wear test was performed
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Volume 1 Issue 2 (2022) 11 https://doi.org/10.18063/msam.v1i2.12