Paper Title:
Elaboration and Mechanical Characterization of Al2O3-ZrO2-YAG Ultrafine Composites
  Abstract

Al2O3-YAG-ZrO2 composites have been produced by surface modification of a commercial nano-crystalline alumina powder with inorganic precursors of the desired second phases. The doped powders were calcined at various temperatures and for different times: as a function of the thermal treatment, zirconia directly crystallized on the alumina surface, while YAG phase was yielded by solid state reaction among an amorphous yttrium-rich precursor and alumina powder. Several compositions, with increasing second phases volume fractions, were investigated, precisely, Alumina-5vol.%YAG-5vol.%ZrO2, Alumina-20vol.%YAG-20vol.%ZrO2 and Alumina- 33vol.%YAG-33vol.%ZrO. Slip cast bodies were produced by aqueous suspensions of calcined and well-dispersed powders; free-sintering performed at 1500°C for 3 h allowed to reach full densification. The role of the second phases amount on the microstructural features and on some mechanical data preliminary evaluated was established.

  Info
Periodical
Edited by
Pietro VINCENZINI and Jean-François BAUMARD
Pages
76-81
DOI
10.4028/www.scientific.net/AST.62.76
Citation
P. Palmero, V. Naglieri, G. Spina, L. Montanaro, "Elaboration and Mechanical Characterization of Al2O3-ZrO2-YAG Ultrafine Composites", Advances in Science and Technology, Vol. 62, pp. 76-81, 2010
Online since
October 2010
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$35.00
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