Properties of Copper-Based Composite Reinforced with Al2O3 Particles of Different Size
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Copper matrix was simultaneously reinforced with nano- and micro-sized Al2O3 particles via high-energy milling of the mixture of inert gas-atomized prealloyed Cu-1 wt.% Al powder and 0.6 wt.% commercial Al2O3 powder. At the maximum of microhardness (2400 MPa) the grain size reaches the smallest value as a result of the synergetic effect of nano- and micro-sized Al2O3 particles. The relatively low decrease in microhardness during HTE may be explained by grain growth which is retarded by Al2O3 nano-sized particles precipitated at the grain boundaries.
Keywords:Copper matrix strengthening / Micro- and nano-sized Al2O3 particles / High-energy milling / Structure / Properties
Source:2014, 875-877, 318-+
- Advanced Materials Research, International Conference on Advanced Material and Manufacturing Science (ICAMMS 2012), Dec 20-21, 2012, Beijing, Peoples R China