Influence of pulsing current on the glass transition and crystallizing kinetics of a Zr base bulk amorphous alloy

2004 ◽  
Vol 49 (24) ◽  
pp. 2581 ◽  
Author(s):  
Wenfei WU
Keyword(s):  
Glass Transition ◽  
Amorphous Alloy ◽  
Bulk Amorphous Alloy ◽  
Kinetics Of

scholarly journals Glass Transition Kinetics of 2714A amorphous alloy

2018 ◽  
Vol 330 ◽  
pp. 012002
Author(s):  
T Shanker Rao ◽  
T Lilly Shanker Rao ◽  
A M Shaker ◽  
K Venkataraman
Keyword(s):  
Glass Transition ◽  
Amorphous Alloy ◽  
Glass Transition Kinetics ◽  
Kinetics Of

The Crystal Growth of Ti50Cu23Ni20Sn7 during the SPS Process

2012 ◽  
Vol 428 ◽  
pp. 190-195 ◽  
Author(s):  
Qiang Li ◽  
Yu Ying Zhu ◽  
Yun Hua He ◽  
Ge Wang ◽  
Xing Hua Wang
Keyword(s):  
Glass Transition ◽  
Amorphous Alloy ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Amorphous Powder ◽  
High Energy ◽  
Bulk Amorphous Alloy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Amorphous Alloy Powder

Ti50Cu23Ni20Sn7 bulk amorphous alloy was prepared by mechanical alloying and spark plasma sintering. The milling was performed in a high-energy planetary ball mill. XRD showed that after milled 35h, fully amorphous powders can be obtained, under the condition of the milling speed, 300rpm, and the weighs ratio of ball to powder, 20:1. Thermal stability of the as-milled amorphous powder was determined by DSC at the heating rate of 40K/min. The glass transition Tg and the initial crystallization temperature Tx1 was 746K and 782K, respectively. Then, the obtained amorphous alloy powder was compacted by spark plasma sintering at the temperature of 753K, 763K, 773K, 783K and 793K under the compress of 500Mpa. Crystal structure and the morphology of the sintered samples were investigated by XRD and SEM, respectively. When sintered near the glass transition temperature, the SPS sintered samples remained complete amorphous, crystalline peak did not appear in the XRD curves. As the sintering temperature increased, the crystalline phases in the sample began to increase. It was shown that when sintered at 753K and 763K, the samples had fewer defects, and it was completely amorphous alloy. When the sintering temperature increased to 773K, more defects appeared, including point-like defects and disc-shaped defects. The disc-shaped defect was widespread in the specimens sintered at 783K and 793K.

Effect of annealing on the kinetics of glass transition and crystallization in Co–Fe–Ta–B amorphous alloy

2007 ◽  
Vol 429 (1-2) ◽  
pp. 104-110 ◽  
Author(s):  
Zi-Zhou Yuan ◽  
Bing-Xia Wang ◽  
Ya-Dong Tong ◽  
Xue-Ding Chen
Keyword(s):  
Glass Transition ◽  
Amorphous Alloy ◽  
Kinetics Of

scholarly journals Effect of pressure on the glass transition and crystallization dynamics of Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk amorphous alloy

2007 ◽  
Vol 56 (7) ◽  
pp. 4004
Author(s):  
Wang Xiu-Ying ◽  
Chen Ying ◽  
Zhang Ning-Yu ◽  
Zhao Li-Ping ◽  
Pang Yan-Tao ◽  
...  
Keyword(s):  
Glass Transition ◽  
Amorphous Alloy ◽  
Bulk Amorphous Alloy ◽  
Effect Of Pressure ◽  
Crystallization Dynamics

Isothermal Crystallization of Zr55Al10Ni5Cu30 Bulk Amorphous Alloy Near the Glass Transition Temperature

2004 ◽  
Vol 449-452 ◽  
pp. 933-936 ◽  
Author(s):  
Zhuang Qi Hu ◽  
Q.S. Zhang ◽  
Hai Feng Zhang ◽  
B.Z. Ding ◽  
Z.M. Rao
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Amorphous Alloy ◽  
Amorphous Phase ◽  
Isothermal Crystallization ◽  
Metastable Phases ◽  
Bulk Amorphous Alloy ◽  
Thermal Stability Of

Isothermal crystallization of Zr55Al10Ni5Cu30bulk amorphous alloy near the glass transition temperature has been investigated. The microstructures and thermal stability of the annealed amorphous alloy were examined by HRTEM, XRD and DSC. The amorphous phase in the Zr55Al10Ni5Cu30bulk amorphous alloy crystallized at 420°C through the following processes of amorphous →amorphous with clusters + metastable phases→metastable phases.

Critical Cooling Rate of Y36Nd20Al24Co20 Bulk Amorphous Alloy

2014 ◽  
Vol 670-671 ◽  
pp. 86-89
Author(s):  
Shi Wen He
Keyword(s):  
Glass Transition ◽  
Amorphous Alloy ◽  
Cooling Rate ◽  
Supercooled Liquid ◽  
Supercooled Liquid Region ◽  
Glass Forming Ability ◽  
Bulk Amorphous Alloy ◽  
Liquid Region ◽  
Critical Cooling Rate ◽  
Glass Forming

A new bulk amorphous alloy, Y36Nd20Al24Co20, with a diameter of 5 mm was successfully fabricated by the method of equiatomic substitution for the Y element in Y56Al24Co20amorphous alloy. The values of the supercooled liquid region ∆Tx(=Tx-Tg), the reduced glass transition temperature Trg(=Tg/Tl) and the parameter γ (=Tx/(Tg+Tl)) for Y36Nd20Al24Co20bulk amorphous alloy are 60K, 0.605 and 0.415, respectively. The critical cooling rate of the Y36Nd20Al24Co20bulk amorphous alloy was determined to be 40 K/s, providing an indication that this alloy has a high glass-forming ability.

Crystallization Kinetics of Fe76.5−x C6.0Si3.3B5.5P8.7Cu x (x = 0, 0.5, and 1 at. pct) Bulk Amorphous Alloy

2014 ◽  
Vol 46 (6) ◽  
pp. 2415-2421 ◽  
Author(s):  
Hyo Yun Jung ◽  
Mihai Stoica ◽  
Seonghoon Yi ◽  
Do Hyang Kim ◽  
Jürgen Eckert
Keyword(s):  
Amorphous Alloy ◽  
Crystallization Kinetics ◽  
Bulk Amorphous Alloy ◽  
Kinetics Of

Formation and crystallization kinetics of Nd–Fe–B-based bulk amorphous alloy

2013 ◽  
Vol 115 (4) ◽  
pp. 1423-1427
Author(s):  
Qiong Wu ◽  
Hongliang Ge ◽  
Pengyue Zhang ◽  
Dongyun Li ◽  
Zisheng Wang
Keyword(s):  
Amorphous Alloy ◽  
Crystallization Kinetics ◽  
Bulk Amorphous Alloy ◽  
Kinetics Of
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