Enhanced crystallization resistance and thermal stability via suppressing the metastable superlattice phase in Ni-(Pd)-P metallic glasses
| Autor: | Dongdong Xiao, Qing Du, Hui Wang, Zhaoping Lu, Yuan Wu, Xiongjun Liu, Yihuan Cao, Yuren Wen |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Superlattice Nucleation 02 engineering and technology 010402 general chemistry Condensed Matter::Disordered Systems and Neural Networks 01 natural sciences law.invention law Phase (matter) Metastability Materials Chemistry Crystallization Supercooling Eutectic system Amorphous metal Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology 0104 chemical sciences Condensed Matter::Soft Condensed Matter Mechanics of Materials Chemical physics Ceramics and Composites 0210 nano-technology |
| Zdroj: | Journal of Materials Science & Technology. 42:203-211 |
| ISSN: | 1005-0302 |
| DOI: | 10.1016/j.jmst.2019.11.005 |
| Popis: | Virtually, glass formation is to avoid crystallization during solidification, i.e., a consequence of the competition between the undercooled liquid and primary crystalline phases. It is found that the crystallization resistance of the binary Ni-P system was drastically enhanced with alloying of Pd and correspondingly, the critical size for glass formation increased significantly from the micrometer to millimeter scale. Thermodynamically, the introduction of Pd could effectively increase the atomic size mismatch and heat of mixing, which are beneficial to stabilize the supercooled liquid. Kinetically, the introduction of Pd not only successfully suppresses the formation of metastable superlattice phase, which is prone to nucleation and growth in the supercooled liquid state, but also changes the crystallization mechanism from the primary to eutectic mode. The current finding sheds light on understanding glass formation of the most studied Pd-Ni-P system and the glass-forming ability in general. |
| Databáze: | OpenAIRE |
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