Loading...

Wear behaviour of in situ Cu-Al2O3 composites produced by internal oxidation of as cast alloys

Soleimanpour, A. M ; Sharif University of Technology | 2009

1303 Viewed
  1. Type of Document: Article
  2. DOI: 10.1179/175158309X12560424605150
  3. Publisher: 2009
  4. Abstract:
  5. In the present study, the wear behaviour of Cu-Al2O3 composites and Cu-Al alloys has been investigated. The experiment involved casting of Cu-Al alloys with 0•37, 1, 2 and 3 wt-% of aluminium under inert gas atmosphere. The composites were produced by internal oxidation of alloys at 950°C for 10 h in presence of Fe2O3 and Al 2O3 powders mixture. The microstructures of composites were studied using SEM and atomic force microscopy. To identify wear behaviour of specimens, dry sliding pin-on-disk wear tests were conducted according to ASTM G99-95a standard. The normal loads of 20, 30, and 40 N were applied on specimens during wear tests. The sliding speed and distances were selected as 0•5 m s-1 and 500, 1000 and 1500 m respectively. To specify the wear mechanisms, the worn surfaces of composites were examined by SEM equipped with EDX. According to wear test results, increasing applied load and sliding distance leads to more volume loss in all specimens. Composites represent better wear resistance in comparison to alloys. Additionally, increasing the volume fraction of alumina particles in composites enhances the wear resistance, especially under high applied load. The wear mechanisms are mainly abrasion, oxidation and delamination. © 2009 W. S. Maney & Son Ltd
  6. Keywords:
  7. CU-Al2O3 composite ; Alumina particles ; Applied loads ; As cast alloy ; Cu-Al alloys ; Dry sliding ; Dry sliding wear ; In-situ ; Inert gas atmosphere ; Normal loads ; Pin-on-disk wear test ; SEM ; Sliding distances ; Sliding speed ; Volume loss ; Wear test ; Worn surface ; Alloys ; Aluminum ; Atomic force microscopy ; Cerium alloys ; Copper alloys ; Inert gases ; Tribology ; Wear of materials ; Wear resistance ; Internal oxidation ; Wear mechanisms
  8. Source: Tribology - Materials, Surfaces and Interfaces ; Volume 3, Issue 3 , 2009 , Pages 125-131 ; 17515831 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1179/175158309X12560424605150