Key Laboratory of Materials Science and Processing Technology for Non ferrous Metals of Henan

Luoyang, China

Key Laboratory of Materials Science and Processing Technology for Non ferrous Metals of Henan

Luoyang, China

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Guo X.-H.,Xi'an University of Science and Technology | Guo X.-H.,Henan University of Science and Technology | Guo X.-H.,Key Laboratory of Materials Science and Processing Technology for Non ferrous Metals of Henan | Song K.-X.,Henan University of Science and Technology | And 5 more authors.
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | Year: 2014

With Al2O3 particles as reinforcements, Al2O3/Cu composites with different volume fractions of α-Al2O3 particles were fabricated by internal oxidation and powder metallurgy respectively. Electrical sliding wear tests were performed to examine the wear properties of Al2O3/Cu composites on a self-made pin-on-disk electrical wear tester. The effects of preparation technology on electrical wear performance of Al2O3/Cu composites were studied. The results show that electrical conductivity and hardness of Al2O3/Cu composite fabricated by internal oxidation are higher than that of fabricated by powder metallurgy method. The electrical wear properties of Al2O3/Cu composites are consistent with the mechanical properties of Al2O3/Cu composite. Microstructure observation shows that the interfaces between Al2O3 particles and copper matrix within Al2O3/Cu composites fabricated by internal oxidation are more neat and compact than that in Al2O3/Cu composite materials fabricated by powder metallurgy, which is the main cause of better electrical wear resistance of Al2O3/Cu composite fabricated by internal oxidation.

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