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.