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Preparation and Research of Composite Materials of the AlO–ZrO–LaO System

Refractories and Industrial Ceramics, ISSN: 1573-9139, Vol: 64, Issue: 1, Page: 63-66
2023
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Introduction of lanthanum oxide into an aluminum-zirconium matrix leads to the formation of LaAlO during sintering in air at 1520°C for 2 h. The grain size of aluminum oxide is at the level of 0.75 μm. The highest crack resistance (6.2 ± 0.3 MPa·m) with the selected technological parameters for obtaining the materials is found for the material with 3 wt.% LaAlO. The critical stress intensity coefficient of such material is 24% higher than that of aluminum-zirconium ceramics without additives.

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