Directionally Solidified Al2O3/Er3Al5O12 and Al2O3/Yb3Al5O12 Eutectic Ceramics Prepared by Optical Floating Zone Melting
Source abstract
Abstract
Al 2 O 3 /Er 3 Al 5 O 12 (ErAG) and Al 2 O 3 /Yb 3 Al 5 O 12 (YbAG) eutectic rods with fine and homogeneous microstructure, free from cracks or pores, were directionally solidified using optical floating zone method at growth rate of 10 mm/h. The crystallographic orientation, preferred orientation, and 3D distribution of Al 2 O 3 and Er 3 Al 5 O 12 /Yb 3 Al 5 O 12 phases in the terminal growth zone of Al 2 O 3 /ErAG and Al 2 O 3 /YbAG eutectics were investigated by EBSD and high-resolution X-ray microscope. Vickers hardness of the as-prepared Al 2 O 3 /ErAG and Al 2 O 3 /YbAG eutectics are determined as (13.50.4) and (12.80.1) GPa, respectively. The fracture toughness results of Al 2 O 3 /ErAG and Al 2 O 3 /YbAG are (3.00.2) and (3.20.1) MPam 1/2 , respectively.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Microwave Dielectric Ceramics Synthesis · Luminescence Properties of Advanced Materials
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References (29)
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