The heat treatment effect on the structure and mechanical properties of electrodeposited nano grain size Ni–W alloy coatings
| Autor: | Chia-Hua Chang, Kung-Hsu Hou, Sha-Ming Chang, Yun-Feng Chang |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Annealing (metallurgy) Metallurgy Alloy Metals and Alloys chemistry.chemical_element Surfaces and Interfaces engineering.material Tungsten equipment and supplies Grain size Surfaces Coatings and Films Electronic Optical and Magnetic Materials Wear resistance Coating chemistry Nano Materials Chemistry engineering Treatment effect |
| Zdroj: | Thin Solid Films. 518:7535-7540 |
| ISSN: | 0040-6090 |
| Popis: | The Ni–W alloy coatings with tungsten content from 32.5 to 61.2 wt.% were prepared in this study by electro-deposition. Experimental results show that the grain size of Ni–W coatings evaluated by XRD decreased with increasing tungsten content in coatings, however, the micro-hardness increased with increasing tungsten content. As-deposited Ni–61.2 wt.%W coating has amorphous-like structure and the grain size is around 1.5 nm, after annealing at 500 °C, the hardness of the coating is promoted to 1293 Hv owing to formation of Ni 4 W and NW precipitates. In addition, the heat-treated Ni–W coatings show a better wear resistance than the as-plated Ni–W coatings. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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