Mechanical and thermal behaviour of cordierite-zirconia composites

5 de janeiro de 2002

Cordierite (Mg2Al4Si5O18) ceramics are susceptible of mechanical failure due to their low fracture toughness, which may hinder their application. Dispersion of ZrO2 in cordierite to improve the mechanical properties has been extensively studied. However, little is known about the effect of such additions on both the sinterability and the mechanical properties of cordierite bodies fabricated from talc, kaolin and alumina mixes with additions of monoclinic ZrO2, as most studies are concerned with additions of tetragonal ZrO2 to cordierite powders. The present paper describes the in situ fabrication, the thermal and mechanical properties of sintered cordierite-based ceramic matrix composites containing dispersed particles of ZrO2 obtained by mixing claytalcalumina mixtures with additions of monoclinic ZrO2 up to 40 wt.%. The results obtained clearly demonstrate that the thermal expansion coefficient (CTE), elastic moduli (E) and flexural strength (r) were critically dependent on the mixing/milling conditions, the ZrO2 content and the retained porosity.

Autores da comunidade :

• 

  J

  José Jorge Lopes da Cruz Fernandes

  ist13458

  Afiliações e fontes

  IST > LAETA

  Laboratório Associado de Energia, Transportes e Aeronáutica

  IST > DEM

  Departamento de Engenharia Mecânica

  De: orcid

  ID: 17584294

  De: scopus

  ID: 2-s2.0-0036134405

  De: cienciavitae

  ID: 1867046

AO - Versão original do autor

CERAMICS INTERNACIONAL

79

91

28

1

10.1016/S0272-8842(01)00061-X

materials-engineering - Engenharia dos Materiais

eng - Inglês

http://www.scopus.com/inward/record.url?eid=2-s2.0-0036134405&partnerID=MN8TOARS