The effect of Al 2 O 3 on the high‐temperature oxidation resistance of Si‐B‐C ceramic under air atmosphere
Source abstract
Abstract
Abstract Si‐B‐C ceramics were prepared through reaction sintering, and the influence of Al 2 O 3 addition on the high‐temperature (1100‐1300°C) oxidation behavior of the material under air atmosphere was studied. The erosion behavior and mechanism are determined from the measurement of weigh changes, microstructure observations, and characterization of the generated oxides on postexposure specimens. Results show that Al 2 O 3 is enriched in the oxidized layer, inhibiting the volatilization of B 2 O 3 and impeding the crystallization ability of oxide (cristobalite). Narrower erosion layer and less weigh change are observed with Al 2 O 3 . Low‐frequency Raman results reveals that with the increase in Al 2 O 3 , the bending vibrations of the BO 4 units and B‐O‐B stretching of the metaborate ring relative intensity are enhanced. Furthermore, high‐frequency Raman results shows that the relative proportion of high‐dimensional vibration modes Q 3 and Q 4 which result in a higher viscosity of melt and a greater resistance of oxygen diffusion are positively correlated with Al 2 O 3 .
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China
Structural Ceramics and Composites Engineering Research Center Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China
ShanghaiTech University Shanghai China
University of Chinese Academy of Sciences Beijing China
Shanghai Institute of Materials Genome Shanghai China
Funding
Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Center for Advanced Study, University of Illinois at Urbana-Champaign
References (39)
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