Laser synthesis of Al2TiO5 and Y3Al5O12 ceramics from powder mixtures Al2O3-TiO2 and Al2O3-Y2O3

Abstract

The phase formation process in the zone of laser irradiation of 60 wt.% Al2O3-40 wt.% TiO2 and 60 wt.% Al2O3- 40 wt.% Y2O3 compacts has been investigated by the XRD, electron microscopy, and atomic force microscopy methods. In the laser irradiation zone the ceramic track is formed. Due to no uniformity of heating of the powder mixture Al2O3-TiO2 the ceramic track consists of a surface layer of the α-Al2TiO5 and the bulk layer from the β- Al2TiO5. Ceramic track formed during irradiation of Al2O3-Y2O3 mixture consists of a surface amorphous layer of Y3Al5O12 with inclusions of α-Al2O3 domains and the bulk layer consisting of a mixture of dendrites α-Al2O3 and Y3Al5O12.

Keywords

• Al2O3
• TiO2
• Y2O3
• laser treatment
• α-, β-Al2TiO5
• α-Al2O3
• Y3Al5O12