Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Alumina/Zirconia Micro/nanocomposites, a New Material for Biomedical Applications with Superior Sliding Wear Resistance
Year:2007
Research Areas
  • Materials
Information
Abstract
In the present investigation, the sliding wear behavior is described for Al2O3/ZrO2 micro/nanocomposites and monolithic alumina of similar grain size under defined conditions of a constant sliding speed and different loads (20-150 N). Nano ZrO2 particles (1.7 vol%) were observed uniformly distributing throughout the composites, and most of them were located within the matrix alumina grains. The wear rate of the alumina and the micro/nanocomposites increased as the contact load increased and a clear transition in friction and wear behavior was observed in both materials. However, the nanocomposite wear resistance at low contact loads was one order of magnitude higher than that of the alumina. In the severe regime, no difference was observed among the materials. The low wear rate (10(-7) mm(3).(N.m)(-1)) along with low pullout indicates higher wear resistance of micro/nanocomposites in the mild regime compared with monolithic alumina. Based on the morphological observation of worn surfaces by scanning electron microscope and on residual stress analysis performed by neutron diffraction, some wear mechanisms of Al2O3-ZrO2 micro/nanocomposites are proposed. The high wear resistance of the nanocomposites is discussed in terms of fracture resistance properties and residual stress. Improvements in mechanical and tribological properties of these composites make them promising candidates for biomedical applications.
International
Si
JCR
Si
Title
J AM CERAM SOC
ISBN
0002-7820
Impact factor JCR
1,792
Impact info
Volume
90
Journal number
10
From page
3177
To page
3184
Month
OCTUBRE
Ranking
Participants
  • Autor: A.H. de Aza
  • Autor: J.F. Bartolomé
  • Autor: Antonia Martin Sanz (UPM)
  • Autor: Fco. Javier Llorca Martinez (UPM)
  • Autor: R. Torrecillas
  • Autor: Jose Ignacio Pastor Caño (UPM)
  • Autor: G. Bruno
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales avanzados y nanomateriales
  • Departamento: Ingeniería Civil: Construcción
  • Departamento: Ciencia de los Materiales
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
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