Effect of Electrical Current on Wear Rate of Nano-Al2O3p/Cu Composite

Abstract:

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The nano-Al2O3p/Cu composite performed in this paper was prepared by internal oxidation. The nano-Al2O3p/Cu composite wire and the Cu-Ag alloy wire were slid against a copper-based powder metallurgy strip under unlubricated conditions. The wear behavior of nano-Al2O3p/Cu composite and Cu-Ag alloy were researched under different currents from 0~50A and sliding distance from 0~72Km. Worn surfaces of the nano-Al2O3p/Cu composite were analyzed by scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS). The results indicate that the nano-Al2O3p/Cu composite surface is dispersed with Al2O3 particles having a size of 10~20nm; the wear rate of both 0.60Al2O3p/Cu (containing 0.60wt.% Al2O3) composite and Cu-Ag alloy increases with the increasing electrical current and sliding distance, which increases abruptly at the beginning and smoothly subsequently; The wear rate of Cu-Ag alloy is 2-5 times that of 0.60Al2O3p/Cu composite without electrical current; The wear rate of Cu-Ag alloy is 5-10 times that of 0.60Al2O3p/Cu composite with electrical current of 30A-50A; The sensitivity of electrical current on the Cu-Ag alloy is more apparently than that on 0.60Al2O3p/Cu composite. Adhesive, abrasive, and electrical erosion wear are the dominant mechanisms during the electrical sliding processes.

Info:

Periodical:

Advanced Materials Research (Volumes 97-101)

Edited by:

Zhengyi Jiang and Chunliang Zhang

Pages:

717-723

DOI:

10.4028/www.scientific.net/AMR.97-101.717

Citation:

X. H. Guo et al., "Effect of Electrical Current on Wear Rate of Nano-Al2O3p/Cu Composite", Advanced Materials Research, Vols. 97-101, pp. 717-723, 2010

Online since:

March 2010

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Price:

$35.00

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