Calculation of crystallization start line for Zr48Cu45Al7 bulk metallic glass at a high heating and cooling rate

2009 ◽  
Vol 484 (1-2) ◽  
pp. 698-701 ◽  
Author(s):  
Chun Xia ◽  
Li Xing ◽  
Wen-Yuan Long ◽  
Zhi-Yuan Li ◽  
Yi Li
Keyword(s):  
Metallic Glass ◽  
Cooling Rate ◽  
Bulk Metallic Glass ◽  
Heating And Cooling ◽  
Start Line ◽  
High Heating

Effect of cooling rate on the bending plasticity of Zr55Al10Ni5Cu30 bulk metallic glass

2012 ◽  
Vol 527 ◽  
pp. 36-39 ◽  
Author(s):  
Y. Hu ◽  
H.H. Yan ◽  
T. Lin ◽  
J.F. Li ◽  
Y.H. Zhou
Keyword(s):  
Metallic Glass ◽  
Cooling Rate ◽  
Bulk Metallic Glass

NANOSCALE DIMPLES AND PERIODIC CORRUGATIONS ON FRACTURE SURFACE OF Zr-BASED BULK METALLIC GLASS COMPOSITE

2019 ◽  
Vol 26 (08) ◽  
pp. 1950037
Author(s):  
BO SHI ◽  
SHIYU LUAN ◽  
PEIPENG JIN
Keyword(s):  
Fracture Surface ◽  
Metallic Glass ◽  
Cooling Rate ◽  
Bulk Metallic Glass ◽  
Crystallization Behavior ◽  
Glass Composite ◽  
Bulk Metallic Glass Composite

Nanoscale dimples and periodic corrugations are observed on the fracture surface of Zr-based bulk metallic glass composite (BMGC). The nanoscale periodic corrugations display a curved shape, which is different from that observed in previous works. In addition, the crystallization behavior of [Formula: see text][Formula: see text][Formula: see text][Formula: see text] BMG was investigated. The second crystallization event of Zr-Cu-Ni-Al BMG can be controlled by annealing or tuning cooling rate. The in situ Zr-based BMGC was prepared via lowering cooling rate. The Zr-based BMGC displays completely brittleness.

scholarly journals Ultrashort Sintering and Near Net Shaping of Zr-Based AMZ4 Bulk Metallic Glass

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5862
Author(s):  
Łukasz Żrodowski ◽  
Rafał Wróblewski ◽  
Tomasz Choma ◽  
Tomasz Rygier ◽  
Marcin Rosiński ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Thermal Inertia ◽  
Fast Method ◽  
Short Pulses ◽  
Heating And Cooling ◽  
Metastable Structures ◽  
Near Net Shaping ◽  
Net Shaping ◽  
Field Assisted Sintering

The GeniCore Upgraded Field Assisted Sintering Technology U-FAST was applied to the sintering of a commercial Zr-based bulk metallic glass powder AMZ4. The XRD, SEM and DSC analysis of the sintered compacts showed the benefit of the U-FAST method as an enabler for the production of fully amorphous samples with 100% relative density when sintering at 420 °C/480 s (693 K/480 s) and 440 °C/ 60 s (713 K/480 s). The hardness values for fully amorphous samples, over HV1 519, surpass cast materials and 1625 MPa compressive strengths are comparable to commercial cast products. The advantage of the U-FAST technology in this work is attributed to the high heating and cooling rates inherent to ultra-short pulses, which allow to maintain metastable structures and achieve better temperature control during the process. Increasing sintering temperature and time led to the crystallization of the materials. The geometry and material of the dies and punch determine the thermal inertia and pressure distribution inside the compacts, thus affecting the properties of the near net shape NNS compacts made using the U-FAST device.

Fabrication of ternary Mg–Cu–Gd bulk metallic glass with high glass-forming ability under air atmosphere

2003 ◽  
Vol 18 (7) ◽  
pp. 1502-1504 ◽  
Author(s):  
H. Men ◽  
D. H. Kim
Keyword(s):  
Metallic Glass ◽  
Cooling Rate ◽  
Bulk Metallic Glass ◽  
Glass Formation ◽  
Glass Forming Ability ◽  
Casting Method ◽  
Glass Forming ◽  
Air Atmosphere ◽  
Mold Casting ◽  
Order Of Magnitude

A new Mg65Cu25Gd10 alloy having significantly improved glass-forming ability (GFA) has been developed. In this article, we show that the ternary Mg65Cu25Gd10 bulk metallic glass with diameter of at least 8 mm can successfully be fabricated by a conventional Cu-mold casting method in air atmosphere. The critical cooling rate for glass formation was estimated on the order of magnitude of approximately 1 K/s. When compared with the GFA of Mg65Cu25Y10 alloy, the significantly improved GFA of Mg65Cu25Gd10 alloy cannot be explained by ΔTx and Trg values.

scholarly journals Effect of Cooling Rate on Glass Forming Ability of Novel Fe-Based Bulk Metallic Glass

2020 ◽  
Vol 138 (2) ◽  
pp. 265-267
Author(s):  
H. Redaei ◽  
P. Rezaei-Shahreza ◽  
A. Seifoddini ◽  
S. Hasani
Keyword(s):  
Metallic Glass ◽  
Cooling Rate ◽  
Bulk Metallic Glass ◽  
Glass Forming Ability ◽  
Glass Forming

Critical cooling rate for Fe48Cr15Mo14Y2C15B6 bulk metallic glass formation

2006 ◽  
Vol 14 (8-9) ◽  
pp. 898-902 ◽  
Author(s):  
K. Hildal ◽  
N. Sekido ◽  
J.H. Perepezko
Keyword(s):  
Metallic Glass ◽  
Cooling Rate ◽  
Bulk Metallic Glass ◽  
Glass Formation ◽  
Critical Cooling Rate

Atomistic Theory of Bulk Metallic Glass Formation

2002 ◽  
Vol 754 ◽  
Author(s):  
T. Egami
Keyword(s):  
Glass Transition ◽  
Metallic Glass ◽  
Cooling Rate ◽  
Bulk Metallic Glass ◽  
Glass Formation ◽  
Dynamics Simulation ◽  
Necessary Condition ◽  
Atomic Transport ◽  
Strong Repulsion ◽  
First Time

ABSTRACTBulk metallic glass can be formed only when the critical cooling rate for glass formation is reduced to 100–2 K/sec. However, a cooling rate achievable with molecular dynamics simulation is higher by many orders of magnitude, so the gap has to be abridged by analytical theories. We propose a theory of bulk metallic glass formation based upon our early theories of glass formation composition. The critical concepts include the idea of local glass transition, distributed local glass transition temperatures and coincident local fluctuation for atomic transport. Strong repulsion between small atoms was recognized for the first time as the necessary condition for bulk glass formation.

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