Effect of milling parameters on exfoliation-assisted dispersion of short carbon fibers in silicon carbide powder
Autor: | Thakur Sudesh Kumar Raunija |
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Rok vydání: | 2016 |
Předmět: |
010302 applied physics
Materials science General Chemical Engineering Composite number 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Dispersant chemistry.chemical_compound chemistry Mechanics of Materials 0103 physical sciences Silicon carbide Slurry Particle size Composite material 0210 nano-technology Environmental scanning electron microscope Ball mill Powder mixture |
Zdroj: | Advanced Powder Technology. 27:145-153 |
ISSN: | 0921-8831 |
DOI: | 10.1016/j.apt.2015.11.015 |
Popis: | A novel methodology for the dispersion of carbon fibers (CFs) in silicon carbide (SiC) powder without any dispersing agent was explored. Short CFs were chopped and exfoliated. The exfoliated fibers were dispersed in SiC powder through wet ball milling, drying and crushing. The influence of various ball milling parameters like milling time (MT), ball to powder ratio (BPR), slurry media to powder ratio (SMPR), etc., on the dispersion and distribution, and average particle size (APS) of composite powder was studied. Two MTs (4 and 8 h), two BPRs (4 and 8), and four SMPRs (6, 10, 20 and 35 mL/cm 3 ) were used. The dispersion and distribution was checked through environmental scanning electron microscopy (SEM) and field emission scanning electron microscopy (FESEM). The results showed that the increase in MT and BPR improved the distribution along with dispersion but, surprisingly, infuse fiber filaments. The APS of powder mixture was found to decrease with MT and BPR. The results further showed that the dispersion and distribution was improved with decrease in SMPR. The severe ball formation was noticed at a SMPR of 35 mL/cm 3 . Further, the APS was found highly dependent on SMPR. |
Databáze: | OpenAIRE |
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