Abstract
The most common strategy to enhance the plasticity of metallic glasses (MGs) is to synthesize MG composites with crystalline phases. Here, the evolution of crystallization and the correlation between void-like defects and crystallization for the as-spun and cryogenically-treated (CT) MGs are investigated under a rigorous annealing process conducted in-situ. The as-spun specimen maintains its amorphous structure with a relatively large size of nanoscale defects. However, crystallization is observed for the CT MG with a high concentration of nanoscale defects that decreases during the crystallization process. The crystallization develops readily in the CT MG due to the greater size of the ordered clusters, the higher concentration of seeding sites, and its greater nucleation rate. Our findings demonstrated cryogenic treatment could tune atomic rearrangements, which has guiding significance on designing MG composite with controlled length scales and distribution of crystalline inclusions.
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 107807 |
| Seitenumfang | 10 |
| Fachzeitschrift | Intermetallics |
| Jahrgang | 154.2023 |
| Ausgabenummer | March |
| Frühes Online-Datum | 20 Dez. 2022 |
| DOIs | |
| Publikationsstatus | Veröffentlicht - März 2023 |
Bibliographische Notiz
Funding Information:The structures of the as-spun and CT MGs were determined by X-ray diffraction (XRD) conducted on a D/MAX2500V diffractometer (Rigaku Corp.) at a 2θ scan step of 4° in the range of 10°–90° with 18 kW Cu-Kα radiation with a wavelength λ = 0.154 nm generated at a voltage of 40 kV. The atomic structures of the MG specimens were characterized by high-energy synchrotron X-ray diffraction conducted at the Deutsches Elektronen-Synchrotron (DESY) facility in Hamburg, Germany using a monochromatic beam with a wavelength λ = 0.0207 nm. The collected two-dimensional (2D) diffraction scattering patterns were integrated using the FIT2D data analysis program. The pair-distribution functions (PDFs) were calculated using a PDFgetX2 software. Calorimetric measurements were conducted in a differential scanning calorimetry (DSC) in the temperature range of 500–850 K at a heating rate of 20 K/min under a flow or purified argon using a Netzsch DSC404C thermal analyzer. Each measurement was conducted twice to ensure reliability. Structural analyses were conducted using a spherical aberration corrected and Cs-corrected JEOL JEM-ARMF 300 Grand atomic resolution microscope (ARM) operated at 300 keV. The TEM specimens were prepared from foil disks with a diameter of 3 mm and a thickness of 30 μm, which were subsequently finely thinned by focused ion beam (FIB) milling with Ga+ ions in a Helios NanoLab 600i SEM/FIB dual-beam workstation under an ultra-high vacuum environment. The thinned specimen was loaded into a support ring equipped with a model 628 double-tilted heating holder (Gatan, Inc.) for in-situ annealing.This work was supported by the open research fund of Songshan Lake Materials Laboratory (no. 2021SLABFN06), the Innovation Program of Shanghai Municipal Education Commission (no. 2021-01-07-00-09-E00114), the financial support from Program 173 (no. 2020-JCIQ-ZD-186-01) and the National Natural Science Foundation of China (nos. 51971123, 51925103, 51827801, 52201183). Additional support from the China Scholarship Council is acknowledged. The authors are also grateful for the financial support by the Deutsche Forschungsgemeinschaft (DFG) through Grant No. SO 1518/1-1 and the European Research Council under the ERC Advanced Grant INTELHYB (grant ERC-2013-ADG-340025).
Funding Information:
This work was supported by the open research fund of Songshan Lake Materials Laboratory (no. 2021SLABFN06 ), the Innovation Program of Shanghai Municipal Education Commission (no. 2021-01-07-00-09-E00114 ), the financial support from Program 173 (no. 2020-JCIQ-ZD-186-01) and the National Natural Science Foundation of China (nos. 51971123 , 51925103 , 51827801 , 52201183 ). Additional support from the China Scholarship Council is acknowledged. The authors are also grateful for the financial support by the Deutsche Forschungsgemeinschaft (DFG) through Grant No. SO 1518/1-1 and the European Research Council under the ERC Advanced Grant INTELHYB (grant ERC-2013-ADG-340025 ).
Publisher Copyright:
© 2022 Elsevier Ltd