The effect of residual stresses in functionally graded alumina–ZTA composites on their wear and friction behaviour

In this work we have evaluated the effect of compressive stress levels in functionally graded alumina–ZTA composites on their wear and friction behaviour during sliding in water. Neutron diffraction, X-ray diffraction and scanning electron microscopy were employed to analyze the samples and assess t...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2007, Vol.27 (1), p.151-156
Main Authors: Novak, S., Kalin, M., Lukas, P., Anne, G., Vleugels, J., Van Der Biest, O.
Format: Article
Language:English
Subjects:
Al 2O 3
Applied sciences
Biological and medical sciences
Biomedical applications
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Functionally graded material
Materials science
Medical sciences
Miscellaneous
Other materials
Physics
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Specific materials
Technical ceramics
Technology. Biomaterials. Equipments. Material. Instrumentation
Wear resistance
ZrO 2
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Summary:In this work we have evaluated the effect of compressive stress levels in functionally graded alumina–ZTA composites on their wear and friction behaviour during sliding in water. Neutron diffraction, X-ray diffraction and scanning electron microscopy were employed to analyze the samples and assess the acting tribological mechanisms. The results, which are compared to results from homogeneous alumina, show that with increasing residual compressive stresses in the samples of functionally graded material (FGM) both the wear and the friction are reduced. As a consequence of reduced crack formation and debris detachment from the surface (due to increased residual compressive stress) the tribochemical layer became thinner, with fewer topographical irregularities at the surface. This increases the role of the tribochemical actions compared to the mechanical wear, which beneficially affects the tribological performance in water.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2006.01.021