Abstract
The phase formation processes in the zone of directional laser irradiation of compacted Al2O3–TiO2–Y2O3 mixtures have been investigated. It has been established that the formed ceramic material (track) has a complex structure. Its surface layer contains α-Al2O3 as the main phase and Y2Ti2O7 inter layers. With increase in the distance from the surface of the track, the content of α-Al2O3 decreases, and the content of Y2Ti2O7 increases. The volume layers of the track contain Y2Ti2O7 as the main phase and inclusions of Y3Al5O12. The absence of Al2TiO5 or its small content is explained by the decomposition of aluminum titanate into Al2O3 and TiO2 under the conditions of rapid cooling of eutectic melt. Released titanium oxide takes part in the formation of the Y2Ti2O7 phase.
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