Formation and Oxidation Behavior of β-Sialon-Melilite Solid Solution Ceramics
Source abstract
Abstract
The formation behavior of the composition of β10-Sialon(Si5.23Al0.77O0.77N7.2 3)plus 7.26wt%Nd-meilite sclid solution (Nd2Si2AIO4N,3) prepared by pressureless sintering was studied. Nd ionsin the composition enter α- sialon at low temperature, dissolve in the liquid phase of the materialwith temperature increasing. Melilite solid solution can be formed as a grain boundary phaseof the ceramics by heat-teatment at 1550℃ for 24h. The oxidation behavior of the hot-pressedand post-sintered samples was also investigated in the range of 1000-1400℃. The melilite solidsolution doesn't canes severe cracking of the material in oxidation at 1000℃. At high temperature,the oxidized surface of the sample contains preferentially oriented A--Nd2Si2O7 grains and bubbles,which are formed because of the decrease of the silicate viscosity, incurred by the accumulation ofNd ions to the surface.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Glass properties and applications · Nuclear materials and radiation effects
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