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Tribological behavior of Mg-WC nano-composites at elevated temperature
| Content Provider | Scilit |
|---|---|
| Author | Banerjee, Sudip Poria, Suswagata Sutradhar, Goutam Sahoo, Prasanta |
| Copyright Year | 2019 |
| Description | Journal: Materials Research Express The present study evaluates the tribological behavior of Mg-WC nano-composites at elevated temperature. Mg-WC nano-composites with varying wt% of WC (0.5%, 1%, 1.5% and 2%) have been prepared using ultrasonic vibration assisted stir casting method. Characterizations of composites are performed with the help of optical microscopy, scanning electron microscopy and energy dispersive x-ray patterns. Characterization results confirm the presence of reinforcement phase and microstructural integrity of composites. Micro-hardness and density of composites and base alloy are studied. Effects of operating temperature, applied load and sliding distance on wear and friction characteristics of composites are examined in a high temperature tribotester under dry sliding conditions. Operating temperature is varied over a range of 50°C to 250°C while applied load is varied from 20 N to 40 N. Micro-hardness results confirm the improvement in mechanical properties of composites in presence of WC reinforcement. Wear and friction behavior of magnesium alloy gets substantially enhanced with WC nano-particles being incorporated as reinforcement. With incorporation of 2 wt% of WC, wear rate and coefficient of friction of magnesium alloy gets reduced by about 75% and 15% respectively at 20 N and 200°C. Effects of thermal softening in composites get negated by the presence of harder ceramic phase through formation of some hardened layer at the contact regime. |
| Related Links | https://iopscience.iop.org/article/10.1088/2053-1591/ab2379/pdf |
| ISSN | 20531591 |
| e-ISSN | 20531591 |
| DOI | 10.1088/2053-1591/ab2379 |
| Journal | Materials Research Express |
| Issue Number | 8 |
| Volume Number | 6 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2019-05-22 |
| Access Restriction | Open |
| Subject Keyword | Journal: Materials Research Express Composite Materials |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Metals and Alloys Biomaterials Electronic, Optical and Magnetic Materials Polymers and Plastics |
