Core-shell structured titanium-nitrogen alloys with high strength, high thermal stability and good plasticity
| Autor: | Pingping Zhang, Jun Lu, Yonghao Zhao, Jingtong Hu, W. T. Huo, Wenhong Zhang, Yiming Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Multidisciplinary Materials science Spark plasma sintering chemistry.chemical_element 02 engineering and technology Plasticity 021001 nanoscience & nanotechnology 01 natural sciences Article chemistry 0103 physical sciences Fracture (geology) Thermal stability Composite material 0210 nano-technology Ductility Nitriding Solid solution Titanium |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | Multifunctional materials with more than two good properties are widely required in modern industries. However, some properties are often trade-off with each other by single microstructural designation. For example, nanostructured materials have high strength, but low ductility and thermal stability. Here by means of spark plasma sintering (SPS) of nitrided Ti particles, we synthesized bulk core-shell structured Ti alloys with isolated soft coarse-grained Ti cores and hard Ti-N solid solution shells. The core-shell Ti alloys exhibit a high yield strength (~1.4 GPa) comparable to that of nanostructured states and high thermal stability (over 1100 °C, 0.71 of melting temperature), contributed by the hard Ti-N shells, as well as a good plasticity (fracture plasticity of 12%) due to the soft Ti cores. Our results demonstrate that this core-shell structure offers a design pathway towards an advanced material with enhancing strength-plasticity-thermal stability synergy. |
| Databáze: | OpenAIRE |
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