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

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.

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.

Study of internal friction behavior in a Zr base bulk amorphous alloy around the glass transition

2005 ◽  
Vol 403 (1-2) ◽  
pp. 328-333 ◽  
Author(s):  
Q. Wang ◽  
J.M. Pelletier ◽  
J. Lu ◽  
Y.D. Dong
Keyword(s):  
Glass Transition ◽  
Amorphous Alloy ◽  
Internal Friction ◽  
Bulk Amorphous Alloy ◽  
Friction Behavior

scholarly journals Synthesis of Bulk Amorphous Alloy from Fe-Base Powders by Explosive Consolidation

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 727 ◽  
Author(s):  
Jianbin Li ◽  
Ming Lu ◽  
Yongbao Ai ◽  
Cong Tao ◽  
Yun Xiong
Keyword(s):  
Glass Transition ◽  
Amorphous Alloy ◽  
Supercooled Liquid ◽  
Amorphous Structure ◽  
Bulk Amorphous Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Explosive Consolidation ◽  
Crystallization Onset ◽  
Thermal Stability Of

A Fe61Cr2Nb3Si12B22 amorphous alloy rod sample of 8.8 mm diameter has been successfully prepared through explosive consolidation. The structure and thermal stability of the as-synthesized sample have been analyzed through X-ray diffraction (XRD) and differential scanning calorimeter (DSC) analysis. The results demonstrate that the sample still retains an amorphous structure, and the glass transition temperature (Tg), the crystallization onset temperature (Tx), the supercooled liquid zone (ΔTx) (Tx − Tg) and the reduced glass transition temperatures (Trg) (Tg/Tm) are 784 K, 812 K, 28 K, and 0.556, respectively. Its microstructure has been investigated by optical microscopy (OM) and scanning electron microscopy (SEM). The average microhardness of the alumina compact is about 1069 HV.

Effect of crystallization on corrosion resistance of Cu52.5Ti30Zrll.5Ni6 bulk amorphous alloy

2007 ◽  
Vol 17 (4) ◽  
pp. 751-754 ◽  
Author(s):  
Chao-Gui TAN ◽  
Wen-juan JIANG ◽  
Xue-qing WU ◽  
Xiu-feng WANG ◽  
Jian-guo LIN
Keyword(s):  
Corrosion Resistance ◽  
Amorphous Alloy ◽  
Bulk Amorphous Alloy

scholarly journals Rotating-Beam Fatigue Strength of Pd40Cu30Ni10P20 Bulk Amorphous Alloy

1999 ◽  
Vol 40 (7) ◽  
pp. 696-699 ◽  
Author(s):  
Yoshihiko Yokoyama ◽  
Nobuyuki Nishiyama ◽  
Kenzo Fukaura ◽  
Hisakichi Sunada ◽  
Akihisa Inoue
Keyword(s):  
Fatigue Strength ◽  
Amorphous Alloy ◽  
Bulk Amorphous Alloy ◽  
Rotating Beam

Pair distribution function and its relation to the glass transition in an amorphous alloy

1979 ◽  
Vol 20 (8) ◽  
pp. 3388-3390 ◽  
Author(s):  
Soumen Basak ◽  
Roy Clarke ◽  
S. R. Nagel
Keyword(s):  
Distribution Function ◽  
Glass Transition ◽  
Amorphous Alloy ◽  
Pair Distribution Function

Microstructure and mechanical properties of Cu-based bulk amorphous alloy billets fabricated by spark plasma sintering

2005 ◽  
Vol 406 (1-2) ◽  
pp. 293-299 ◽  
Author(s):  
Chang Kyu Kim ◽  
Han Sang Lee ◽  
Seung Yong Shin ◽  
Jae Chul Lee ◽  
Do Hyang Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Amorphous Alloy ◽  
Spark Plasma Sintering ◽  
Bulk Amorphous Alloy ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Spark Plasma
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