Electrodeposited metallic glasses with superlative wear resistance
| Autor: | Nandita Ghodki, Jibril Shittu, Mayur Pole, Sundeep Mukherjee, Chaitanya Mahajan, Maryam Sadeghilaridjani |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Amorphous metal Critical load Mechanical Engineering Oxide Modulus 02 engineering and technology Tribology 021001 nanoscience & nanotechnology Condensed Matter Physics Wear resistance chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Mechanics of Materials Scratch General Materials Science Composite material 0210 nano-technology computer Order of magnitude computer.programming_language |
| Zdroj: | Materials Science and Engineering: A. 816:141315 |
| ISSN: | 0921-5093 |
| Popis: | The electrodeposition route to obtain amorphous alloys offers a facile, low-cost, and versatile alternative to conventional melt quenching. However, there are significant knowledge gaps in tribological properties and wear mechanisms for electrodeposited metallic glasses (EMGs). Here, the wear behavior and the scratch response of a model binary amorphous alloy system were investigated. Electrodeposited Ni–P metallic glasses were systematically studied as a function of composition, with amorphous alloy formation over the narrow range of 10 at% to 20 at% phosphorus. The electrodeposited metallic glasses showed hardness values in the range of 6.6–7.4 GPa, modulus in the range of 155–163 GPa, and friction coefficient around 0.50. Among the studied alloys, electrodeposited Ni80P20 showed the lowest wear rate, which was two orders of magnitude lower than electrodeposited pure Ni. The wear mechanism was determined to be extensive plastic deformation along with mild ploughing, micro tears, and formation of discontinuous lubricious oxide patches. Scratch tests showed an increase in critical load for damage initiation with the increase in phosphorus content among the amorphous alloys following the trend: Ni80P20 > Ni85P15 > Ni90P10. The overall wear rate for the electrodeposited metallic glasses was found to be lower than most reported bulk metallic glasses (BMGs). This represents a fundamental study on structure-property correlations in electrodeposited metallic glasses and demonstrates the versatility of electrodeposition in tuning the surface properties of amorphous alloys. |
| Databáze: | OpenAIRE |
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