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In-situ visualizing atomic structural evolution during crystallization in ternary Zr Cu Al bulk metallic glasses

Journal Article · · Intermetallics
 [1];  [2];  [1];  [3];  [4];  [4];  [5];  [5];  [6];  [7]
  1. City Univ. of Hong Kong (China). Dept. of Physics and Materials Science
  2. City Univ. of Hong Kong (China). Dept. of Physics and Materials Science; Nanjing Univ. of Science and Technology, Nanjing (China). Herbert Gleiter Inst. of Nanoscience
  3. Hokkaido Univ., Sapporo (Japan). Quantum Beam System Engineering
  4. Hokkaido Univ., Sapporo (Japan). Center for Advanced Research of Energy and Materials
  5. Univ. of Science and Technology, Beijing (China). State Key Lab. for Advanced Metals and Materials
  6. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  7. City Univ. of Hong Kong (China). Dept. of Physics and Materials Science; City Univ. of Hong Kong Shenzhen Research Institute, Shenzhen (China)
A well-designed experimental method has been presented to in-situ visualize the amorphous-to-crystalline phase transformation of two glass formers at the atomic length scale in the supercooled liquid region using a high voltage electron microscopy (HVEM). Analysis of the HVEM high-resolution images, supported by the in situ synchrotron diffraction, further confirms previous observations of distinctively different crystallization pathways in the two Zr-Cu-Al alloys. Moreover, the HVEM results illustrate that isolated distributed nanocrystals with mutual orientation easily grew up from the Zr56Cu36Al8, an average glass former, which follows a classical crystallization pathway; while density population poorly ordered atomic clusters with large misorientation suspended the growth in the Zr46Cu46Al8, a good glass former, which might follow an unusual crystallization pathway. In addition, in-situ synchrotron diffraction measurements confirm that the Zr56Cu36Al8 alloy finally crystallized into an extended structure, in contrast, the final crystalline product of Zr46Cu46Al8 alloy possesses a damped structure. Our study provides a detailed microscopic understanding of the crystallization behaviors in the supercooled liquids, showing that the density population nucleation site with large misorientation and the confined final crystalline structure contribute to the stability of Zr-Cu-Al supercooled liquids.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Ministry of Science and Technology of the Republic of China (MOST); National Natural Science Foundation of China (NNSFC); National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1542629
Alternate ID(s):
OSTI ID: 1636719
Journal Information:
Intermetallics, Journal Name: Intermetallics Journal Issue: C Vol. 105; ISSN 0966-9795
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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