Effect of Primary Silicon Refinement on Mechanical and Wear Properties of a Hypereutectic Al-Si Alloy
| Autor: | Khushubo Tiwari, Narendra Kumar, Sunil Mohan, Anita Mohan, Gaurav Gautam |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Morphology (linguistics) Silicon Alloy chemistry.chemical_element 02 engineering and technology Nitride engineering.material 01 natural sciences law.invention Metal Optical microscope law 0103 physical sciences Microscopy Composite material Diffractometer 010302 applied physics technology industry and agriculture equipment and supplies 021001 nanoscience & nanotechnology Electronic Optical and Magnetic Materials chemistry visual_art engineering visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Silicon. 10:2227-2239 |
| ISSN: | 1876-9918 1876-990X |
| DOI: | 10.1007/s12633-017-9755-2 |
| Popis: | This study explores the effect of primary silicon refinement of hypereutectic Al-Si alloy on the mechanical and wear properties. Refinement has been carried out by purging N2 into hypereutectic Al-Si alloy melt for different period of time. Hypereutectic Al-Si alloy with 16.2 wt.% of Si was taken for the study and purged by N2 gas for different time. Hypereutectic alloy under different conditions was characterised for various properties. X-ray diffractometer (XRD) analysis doesn’t show formation of any nitride but optical microscopy (OM) and scanning-electron microscopy (SEM) results show modified/refined morphology of silicon. Mechanical and dry sliding wear properties were evaluated at ambient temperature and results reveal improvement in these properties. Worn surfaces were also studied under SEM and 3D-profilometer for surface analysis. Results indicate that at low load/sliding velocity, wear is oxidative/mild in nature, whereas, oxidative-metallic/severe wear is observed at high load/sliding velocity. |
| Databáze: | OpenAIRE |
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