Oxidation resistance and wettability of graphite/SiC composite
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Abstract
A graphite/SiC composite was synthesized at different calcination temperatures using microsilica and carboxymethylated cellulose. The oxidation resistance and wettability (with water) of graphite/SiC were investigated. The results showed that carboxymethylated cellulose could react with microsilica to form a coating of SiC on the surface of graphite at elevated temperatures. Consequently, SiO2 phase was converted into SiC phase above 1 600 °C. The microstructure of the SiC coating on graphite became denser with the increase in temperature. Thermogravimetric curves revealed that the weight loss of graphite was approximately 97.3 wt.% whereas the value decreased to 29.78 wt.% when SiC was formed. Differential scanning calorimetry analysis showed that the SiC coating decreased the enthalpy of the carbon oxidation reaction from 12.02 kJ g−1 to 1.14 kJ g−1, confirming excellent oxidation resistance. Furthermore, the water contact angle of graphite was approximately 78.5° whereas that of the graphite/SiC composite was reduced to 43°. The study of the formation of graphite/SiC composite showed that SiO2 could be reduced using carboxymethylated cellulose to SiO (g), which was deposited on the graphite to form SiC coating.
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Articles in the same Issue
- Contents
- Contents
- Original Contributions
- Influence of dislocations on precipitation processes in hot-extruded Al–Mn–Sc–Zr alloy
- Grain size gradient naturally prepared through recrystallization in rapidly solidified undercooled alloy melts
- Solidification behavior and microstructural characterization of Ni–Fe–W and Ni–Fe–W–Co matrix alloys
- Formation of amorphous interfacial layer between Zn-based alloy and SiC particles under ultrasonic-assisted brazing
- Microstructures and biocorrosion properties of biodegradable Mg–Zn–Y–Ca–xZr alloys
- Oxidation resistance and wettability of graphite/SiC composite
- Freeze linings in the Al2O3–CaO–SiO2 system
- Tribological properties of diamond-like carbon films deposited by vacuum arc
- Review
- Synthesis and characterization of magnesium-based hybrid composites – A review
- Short Communications
- Ablation and mechanical investigation of carbon/rubber woven laminates for ultrahigh temperature applications
- Effect of h-BN@Al2O3 on the microstructure and mechanical properties of Si3N4/TiC ceramic composite
- DGM News
- DGM News
Articles in the same Issue
- Contents
- Contents
- Original Contributions
- Influence of dislocations on precipitation processes in hot-extruded Al–Mn–Sc–Zr alloy
- Grain size gradient naturally prepared through recrystallization in rapidly solidified undercooled alloy melts
- Solidification behavior and microstructural characterization of Ni–Fe–W and Ni–Fe–W–Co matrix alloys
- Formation of amorphous interfacial layer between Zn-based alloy and SiC particles under ultrasonic-assisted brazing
- Microstructures and biocorrosion properties of biodegradable Mg–Zn–Y–Ca–xZr alloys
- Oxidation resistance and wettability of graphite/SiC composite
- Freeze linings in the Al2O3–CaO–SiO2 system
- Tribological properties of diamond-like carbon films deposited by vacuum arc
- Review
- Synthesis and characterization of magnesium-based hybrid composites – A review
- Short Communications
- Ablation and mechanical investigation of carbon/rubber woven laminates for ultrahigh temperature applications
- Effect of h-BN@Al2O3 on the microstructure and mechanical properties of Si3N4/TiC ceramic composite
- DGM News
- DGM News