TU Darmstadt / ULB / TUbiblio

Wear behaviour of interpenetrating alumina–copper composites

Winzer, Jami and Weiler, Ludwig and Pourquet, Jeanne and Rödel, Jürgen (2011):
Wear behaviour of interpenetrating alumina–copper composites.
271, In: Wear, (11-12), pp. 2845-2851, ISSN 0043-1648, [Online-Edition: http://dx.doi.org/10.1016/j.wear.2011.05.042],
[Article]

Abstract

The wear behaviour of a variety of alumina–copper interpenetrating composites was tested as a function of copper ligament diameter and volume fraction of copper. The wear mechanisms of pure copper and pure alumina were adhesive and abrasive wear, respectively. In the composites with 1 μm, 5 μm and 15 μm copper ligament diameters, the wear mechanism was a mixture of adhesive and oxidative; in composites with a 30 μm copper ligament diameter a mixture of abrasive and oxidative. Increasing the amount of copper decreased hardness and thus increased wear, except where cyclic tribolayer behaviour occurred or where the alumina grains were weakly bonded. Increasing the copper ligament diameter decreased wear, although this trend was only clear under a load of 20 N. The composites with the highest wear resistance had the highest copper ligament diameter of 30 μm. This was probably due to the higher heat conductivity and fracture toughness caused by the coarse, fibrous copper network replicating the wool felt used to produce it. This was possibly also because these composites had the smallest alumina grain size.

Item Type: Article
Erschienen: 2011
Creators: Winzer, Jami and Weiler, Ludwig and Pourquet, Jeanne and Rödel, Jürgen
Title: Wear behaviour of interpenetrating alumina–copper composites
Language: English
Abstract:

The wear behaviour of a variety of alumina–copper interpenetrating composites was tested as a function of copper ligament diameter and volume fraction of copper. The wear mechanisms of pure copper and pure alumina were adhesive and abrasive wear, respectively. In the composites with 1 μm, 5 μm and 15 μm copper ligament diameters, the wear mechanism was a mixture of adhesive and oxidative; in composites with a 30 μm copper ligament diameter a mixture of abrasive and oxidative. Increasing the amount of copper decreased hardness and thus increased wear, except where cyclic tribolayer behaviour occurred or where the alumina grains were weakly bonded. Increasing the copper ligament diameter decreased wear, although this trend was only clear under a load of 20 N. The composites with the highest wear resistance had the highest copper ligament diameter of 30 μm. This was probably due to the higher heat conductivity and fracture toughness caused by the coarse, fibrous copper network replicating the wool felt used to produce it. This was possibly also because these composites had the smallest alumina grain size.

Journal or Publication Title: Wear
Volume: 271
Number: 11-12
Uncontrolled Keywords: Composites; Metal-reinforcement; Interpenetrating composites; Sliding wear; Hardness
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 10 Aug 2011 09:45
Official URL: http://dx.doi.org/10.1016/j.wear.2011.05.042
Identification Number: doi:10.1016/j.wear.2011.05.042
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)

View Item View Item