Unusual grain coarsening behavior of bismuth under high pressure

Li, Xin1; Yan, Xiaozhi2; Liang, Hao1; Wang, Qiming1; Lei, Li1; Peng, Fang1; Yang, Ke3; He, Duanwei1

2018-12

10.1016/j.matlet.2018.08.016

MATERIALS LETTERS   影响因子和分区

0167-577X

1873-4979

It is well known the atomic diffusion caused by high temperature leads to conspicuous grain coarsening, which is of crucial importance to the properties of materials. High pressure usually slows down the diffusion rate of atoms and refines the grain size. In this study, using synchrotron angle dispersive x-ray diffraction (ADXRD) techniques, we observed an abnormal grain coarsening behavior of bismuth (Bi) stemming from the high pressure phase transition at room temperature, demonstrating that the grain coarsening can also be triggered by pressure. Two factors mainly give raise to this unusual coarsening behavior of Bi: (1) the nucleation rate of new phase is very slow during transformation according to the kinetics study of the phase transition in Bi, which inhibits the grain refinement; (2) the liquid interphase in the phase transition process enables the recrystallization of Bi under high pressure. Our experiment results are consistent with the previous theoretical calculations, which is crucial for describing the nucleation and growth process and clarifying the phase transition mechanisms in Bi. (C) 2018 Elsevier B.V. All rights reserved.

Crystal growth Metals and alloys Crystal structure Phase transformation Recrystallization X-ray techniques

SCI ; EI

英语

其他

project for the Science and Technology Innovation Team of Sichuan Provence[15CXTD0025]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000443261300007

ELSEVIER SCIENCE BV

20183405721332

Bismuth ; Coarsening ; Crystal growth ; Crystal structure ; Crystallization ; Grain refinement ; Grain size and shape ; Nucleation ; Phase transitions ; Recrystallization (metallurgy)

Metallurgy:531.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Crystal Lattice:933.1.1 ; Crystal Growth:933.1.2 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Sichuan, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai, Peoples R China

Li, Xin,Yan, Xiaozhi,Liang, Hao,et al. Unusual grain coarsening behavior of bismuth under high pressure[J]. MATERIALS LETTERS,2018,232:22-24.

Li, Xin.,Yan, Xiaozhi.,Liang, Hao.,Wang, Qiming.,Lei, Li.,...&He, Duanwei.(2018).Unusual grain coarsening behavior of bismuth under high pressure.MATERIALS LETTERS,232,22-24.

Li, Xin,et al."Unusual grain coarsening behavior of bismuth under high pressure".MATERIALS LETTERS 232(2018):22-24.