Core-shell structured titanium-nitrogen alloys with high strength, high thermal stability and good plasticity

• DOI: 10.1038/srep40039
• Publication Date: 2017-01-06T10:09:03Z
• Authors: Y. S. Zhang; Y. H. Zhao; W. Zhang; J. W. Lu; J. J. Hu; W. T. Huo; P. X. Zhang
• Keywords: Thermal Stability; Titanium alloy

Abstract Multifunctional materials with more than two good properties are widely required in modern industries. However, some often trade-off each other by single microstructural designation. For example, nanostructured have high strength, but low ductility and thermal stability. Here means of spark plasma sintering (SPS) nitrided Ti particles, we synthesized bulk core-shell structured alloys isolated soft coarse-grained cores hard Ti-N solid solution shells. The exhibit a yield strength (~1.4 GPa) comparable to that states stability (over 1100 °C, 0.71 melting temperature), contributed the shells, as well plasticity (fracture 12%) due cores. Our results demonstrate this structure offers design pathway towards an advanced material enhancing strength-plasticity-thermal synergy.