Solid-solid phase transition via the liquid in a Pd43Cu27Ni10P20 bulk metallic glass under conventional conditions

Yu Su, Xiao Dong Wang*, Qingmei Su, Gaohui Du, Yang Ren, Kenny Ståhl, Qingping Cao, Dongxian Zhang, Jian Zhong Jiang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The microscopic mechanism of solid-solid phase transitions is a long-standing fundamental issue in materials science. Here we directly report the experimental evidence of the existence of an intermediate liquid during the solid-solid phase transition in a bulk Pd43Cu27Ni10P20 alloy by in situ high temperature high energy X-ray diffraction, combined with the differential scanning calorimetry at slow heating rates down to 5 K/min. We elucidate that this intermediate liquid is attributed to the melting of the low-melting-point crystalline phases, rather than induced by the elastic stress energy along the interface proposed in literatures. This could also be a general feature in multicomponent alloys if a low-melting-point crystalline phase is formed together with other crystalline phases during heating. All results obtained here are scientifically sound and provide new insight into the phase transition theory, which will trigger more studies on the microscopic mechanism of solid-solid phase transition via an intermediate liquid.

Original languageEnglish
Article number157802
JournalJournal of Alloys and Compounds
ISSN0925-8388
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Bulk metallic glasses
  • Differential scanning calorimetry
  • Intermediate liquid phase
  • Solid-solid phase transition
  • X-ray diffraction

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