Orientations and seed type effect on Al2O3-YAG-ZrO2 eutectic microstructure solidified from the melt by the micro-pulling down technique - Archive ouverte HAL Access content directly
Journal Articles Journal of the European Ceramic Society Year : 2021

Orientations and seed type effect on Al2O3-YAG-ZrO2 eutectic microstructure solidified from the melt by the micro-pulling down technique

O. Benamara
  • Function : Author
K. Lebbou

Abstract

Al2O3-YAG-ZrO2 eutectic ceramic rods of 5 mm in diameter were grown by micro-pulling down technique. The seeding and the solidification rate affect microstructure, morphology, crystallography, and thermal stress of the solidified ceramics. The ternary eutectic grown through zirconia (111) seed had inhomogeneous and irregular cellular microstructures. At the stationary stable regime, the microstructure spacing (λ) depends on the pulling rate (v). Under solidification rate of 0.5 mm.min−1, the rods grown by using eutectic poly-crystal, (100), (111) YAG, and c(0001), A(1−210), M(10−10) sapphire seeds, the YAG and ZrO2 phases are oriented along the <100> direction parallel to the growth direction. The zirconia (111) seeding X-ray diagram eutectic presents additional peaks and the monoclinic ZrO2 phase appears at the solidification rate of 1 mm.min-1. The rods grown through ZrO2 seeding are more stressed than those solidified by using eutectic, YAG and sapphire seeds, respectively.
Fichier principal
Vignette du fichier
KLEbbou revised2.pdf (2.47 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-03248508 , version 1 (08-11-2021)

Identifiers

Cite

O. Benamara, K. Lebbou. Orientations and seed type effect on Al2O3-YAG-ZrO2 eutectic microstructure solidified from the melt by the micro-pulling down technique. Journal of the European Ceramic Society, 2021, 41 (11), pp.5613-5623. ⟨10.1016/j.jeurceramsoc.2021.04.047⟩. ⟨hal-03248508⟩
23 View
71 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More