uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Microstructural aspects on wear of cemented carbides
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
2000 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Cemented carbides are known to be very wear resistant and are therefore often usedin applications involving surface damage and wear. The work presented hereinvestigates the coupling between the microstructure and some fundamental wearand deformation mechanisms typical for cemented carbides.

A model to calculate the indentation hardness of cemented-carbides from thecarbide grain size and Co-content has been developed. The model predicts thehardness with 85 % accuracy for compositions ranging from 0 to 40 % Co andcarbide grains between 0.07 to 5μm.

The anisotropic nature of WC has been used to explain the abrasive wearmechanisms of WC single crystals and cemented carbides.

The microstructure and tribological properties of binderless carbides havebeen examined in detail. It is shown that the wear properties are closely connected tothe choice of γ-phase and that the binderless carbides behave more like cemented carbides than ceramics.

A descriptive model for mild abrasion of cemented carbides is proposed. Themodel explains why fairly different cemented carbides behave very similarly whenabraded mildly.

The importance of the binder metal for the performance of cemented carbidesin applications involving combined corrosive and mechanical wear has beeninvestigated. The results show that the binder should be corrosion resistant in itselfbut also be able to control the behaviour of WC.

Wear phenomena on cemented carbide face seals have been analysed withvarious analytical tools including focused ion beam and transmission electronmicroscopy. It is shown that it is possible to form a several micron thick nano-crystalline (WC-Co) tribofilm during dry operation.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2000. , 39 p.
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 504
Keyword [en]
Materials science
Keyword [sv]
National Category
Materials Engineering
Research subject
Materials Science
URN: urn:nbn:se:uu:diva-1237ISBN: 91-554-4639-6OAI: oai:DiVA.org:uu-1237DiVA: diva2:160796
Public defence
2000-02-18, lecture room, Siegbahnsalen at the Ångström Laboratory, Uppsala University, Uppsala, 09:15
Available from: 2000-01-28 Created: 2000-01-28 Last updated: 2011-03-30Bibliographically approved

Open Access in DiVA

No full text
Buy this publication >>

By organisation
Department of Materials Science
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 600 hits
ReferencesLink to record
Permanent link

Direct link