Effects of Cu and Zr on the Formation and Thermal Stability of Al–Ni–Zr–Cu–Y Amorphous Alloy

Al85Ni10Zr3Y2 and Al80Ni10Zr8-xCuxY2（x=1,2,3,5） alloy ribbons had been prepared by single roller melt-spinning process under vacuum conditions. The ribbons were investigated by X–ray diffraction and differential scanning calorimetry (DSC). The results revealed the strong effect of content of Cu、Zr elements on the glass forming ability and the thermal stability of the alloys. The formation of amorphous alloys are sensitive to contens of these two elements. The completely amorphous alloy or the primary amorphous phase alloy can be obtained when the content of Cu or Zr reach an optimization, otherwise only gaining crystal phase. Al80Ni10Zr7Cu1Y2 and Al80Ni10Zr3Cu5Y2 alloys possess the excellent glass forming ability, which can form the completely amorphous alloy or the composite material of the partial crystal in remaining amorphous.

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Crystallization of Ni-Cr-Si-B and Ni-Cr-Fe-Si-B Amorphous Alloys

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.216.35 ◽

2014 ◽

Vol 216 ◽

pp. 35-38 ◽

Cited By ~ 1

Author(s):

Cosmin Codrean ◽

Dragoş Buzdugan ◽

Ramona Lǎzar ◽

Viorel Aurel Şerban ◽

Ion Mitelea

Keyword(s):

Thermal Stability ◽

Chemical Composition ◽

Rapid Solidification ◽

Amorphous Alloys ◽

Structural Characteristics ◽

Glass Forming Ability ◽

Glass Forming ◽

Melting Temperatures ◽

Dta Analysis ◽

Thermal Stability Of

Ni based amorphous alloys with Si and B, which can also, contains Fe and Cr, prepared by rapid solidification, have low melting temperatures. This fact increases their susceptibility to be joined by welding and brazing. The glass forming ability (GFA) is conditioned also by the crystallization delay, due to certain chemical composition of the alloys. The thermal stability of these alloys was revealed by DTA analysis and structural characteristics were investigated by XRD. Applying an annealing at temperatures between 420°C and 540°C, with 30 minutes maintaining time, allowed the investigation of phase occurred during the crystallization and the estimation of the crystalline grains dimensions.

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Glass Forming Ability and Crystallization Kinetics of Al-Mg-Ni-La Metallic Glasses

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.960-961.161 ◽

2014 ◽

Vol 960-961 ◽

pp. 161-164 ◽

Cited By ~ 2

Author(s):

Juan Mu ◽

Hai Feng Zhang

Keyword(s):

Crystallization Kinetics ◽

Glass Forming Ability ◽

Continuous Heating ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

Glass Forming ◽

Dsc Measurements ◽

Mg Addition ◽

Kinetics Of ◽

Thermal Stability Of

Glass forming ability and crystallization kinetics of Al-Mg-Ni-La alloys have been investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The maximum thickness achievable in glasses of Al76Mg11Ni8La5and Al69Mg18Ni8La5ribbons were 200 and 120 μm, respectively. The crystallization temperature and peak temperature indicated by DSC measurements displayed dependence on the heating rate during continuous heating, and were coincident with Lanoka’s relationship. The activation energies for the crystallization reactionExwere obtained from the Kissinger’s equation. The results show the Mg addition is beneficial to the thermal stability of the amorphous phase.

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Ti Microalloying Effect on Corrosion Resistance and Thermal Stability of Cu45Zr48Al7 Bulk Metallic Glass

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.490-495.3868 ◽

2012 ◽

Vol 490-495 ◽

pp. 3868-3873 ◽

Cited By ~ 1

Author(s):

Xiao Hong Yang ◽

Xi Peng Nie ◽

Jian Zhong Jiang

Keyword(s):

Thermal Stability ◽

Corrosion Resistance ◽

Metallic Glasses ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

X Ray ◽

Glass Forming ◽

Ti Addition ◽

Mould Casting ◽

Thermal Stability Of

Bulk metallic glasses (BMGs) of Cu45Zr48-xAl7Tix with x= 0, 1.5, and 3 at.% were prepared by copper mould casting. The corrosion resistance of the BMGs with different Ti contents was examined by potentiodynamic polarization tests and weight loss measurements in 1 N NaOH, 1 N H2SO4, 1 N H2SO4 + 0.01 N NaCl and 0.5 N NaCl solutions, respectively. The newly-developed BMGs’ corrosion resistance in Cl-- or both H+ and Cl--ions containing solutions can be greatly enhanced. The influence of Ti addition on glass forming ability (GFA) and thermal stability was investigated by x-ray diffraction and differential scanning calorimetry in detail. The alloy containing 1.5 at.% Ti exhibits the largest GFA, the critical size comes up to 10 mm in diameter.

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Glass-Forming Ability and Thermal Stability of Gd55-xNdxCo20Al25 Metallic Glass

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.538.270 ◽

2013 ◽

Vol 538 ◽

pp. 270-273

Author(s):

Li Li Zhang ◽

Qi Jun Huang ◽

Zhi Qin Liao ◽

Feng Xu ◽

Guang Chen ◽

...

Keyword(s):

Thermal Stability ◽

Amorphous Ribbon ◽

Glass Forming Ability ◽

X Ray Diffraction ◽

Glass Transition Temperatures ◽

X Ray ◽

Glass Forming ◽

Nd Substitution ◽

Change Of Microstructure ◽

Thermal Stability Of

The effects of Nd substitution in Gd55-xNdxCo20Al25 (x=0, 5, 10, 15 and 20) amorphous ribbon samples on glass-forming ability and thermal stability are studied. The change of microstructure cannot be identified by X-ray diffraction. The forecast of glass-forming ability following Fang’s method shows the increase with x, which is further confirmed experimentally by the increasing reduced glass-transition temperatures. The thermal stability has a minimum at x=10, and it is suggested to be due to the different effects of the reducing of Gd and the increase of Nd.

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Glass-Forming Ability and Crystallization Kinetics of Hf-Ti-Cu-Ni-Al Bulk Metallic Glass

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.479-481.1786 ◽

2012 ◽

Vol 479-481 ◽

pp. 1786-1789 ◽

Cited By ~ 1

Author(s):

Tie Jun Chen

Keyword(s):

Thermal Stability ◽

Crystallization Kinetics ◽

Glass Formation ◽

Glass Forming Ability ◽

Ideal Condition ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

Cross Sectional ◽

Glass Forming

Multi-component Hf45.6Cu27.8Ni9.3Ti5Al12.4bulk metallic glasses (BMGs) were prepared successfully by casted into the water-cooled Cu mold. Characterization of the casted Hf45.6Cu27.8Ni9.3Ti5Al12.4rods was carried out by X-ray diffraction. The thermal stability and crystallization kinetics were followed by differential scanning calorimetry. The results show that the alloy Hf45.6Cu27.8Ni9.3Ti5Al12.4had a critical cylindrical rod diameter for glass formation, Dc, of 7 mm and the largest cross-sectional diameter (about 12.4mm) can be obtained in the ideal condition. The critical cooling rate for glass formation is 6.48K/s. The Hf45.6Cu27.8Ni9.3Ti5Al12.4BMG has larger glass forming ability and higher thermal stability.

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Glass-forming ability and thermal stability of Fe62Nb8−xZrxB30 and Fe72Zr8B20 amorphous alloys?

Open Physics ◽

10.2478/bf02476275 ◽

2004 ◽

Vol 2 (1) ◽

Cited By ~ 1

Author(s):

M. Shapaan ◽

J. Lábár ◽

L. Varga ◽

J. Lendvai

Keyword(s):

Thermal Stability ◽

Amorphous Alloys ◽

Strong Dependence ◽

Supercooled Liquid ◽

Supercooled Liquid Region ◽

Glass Forming Ability ◽

Partial Replacement ◽

Liquid Region ◽

Glass Forming ◽

Thermal Stability Of

AbstractGlass-forming ability (GFA) and thermal stability of Fe62Nb8B30, Fe62Nb6Zr2B30 and Fe72Zr8B20 at % amorphous alloys were investigated by calorimetric (DSC and DTA) measurements. The crystallization kinetics was studied by DSC in the mode of continuous versus linear heating and it was found that both the glass transition temperature, Tg, and the crystallization peak temperature, Tp, display strong dependence on the heating rate. The partial replacement of Nb by Zr leads to lower Tg and Tx temperatures and causes a decrease of the supercooled liquid region. JMA analysis of isothermal transformation data measured between Tg and Tx suggests that the crystallization of the Fe62Nb8B30 and Fe62Nb6Zr2B30 amorphous alloys take place by three-dimensional growth with constant nucleation rate. Nb enhances the precipitation of the metastable Fe23B6 phase and stabilizes it up to the third crystallization stage. Zr addition increases the lattice constant of Fe23B6 and, at the same time, decreases the grain size.

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Mechanical strength and thermal stability of Ti-based amorphous alloys with large glass-forming ability

Materials Science and Engineering A ◽

10.1016/0921-5093(94)90294-1 ◽

1994 ◽

Vol 179-180 ◽

pp. 692-696 ◽

Cited By ~ 129

Author(s):

K. Amiya ◽

N. Nishiyama ◽

A. Inoue ◽

T. Masumoto

Keyword(s):

Thermal Stability ◽

Mechanical Strength ◽

Amorphous Alloys ◽

Glass Forming Ability ◽

Glass Forming ◽

Large Glass ◽

Thermal Stability Of

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Amorphous alloy composition with high glass-formation ability in the pseudoternary Zr-[IQC-Al62Cu25.5Fe12.5]-[DQC-Al70Co15Ni15] alloy system

Journal of Materials Research ◽

10.1557/jmr.2003.0218 ◽

2003 ◽

Vol 18 (7) ◽

pp. 1588-1593

Author(s):

Yi Lei ◽

M. Calvo-Dahlborg ◽

J.M. Dubois ◽

Zukun Hei ◽

P. Weisbecker ◽

...

Keyword(s):

Amorphous Alloy ◽

Melt Spinning ◽

Alloy Composition ◽

Structural Evolution ◽

Alloy System ◽

Glass Forming Ability ◽

Icosahedral Quasicrystal ◽

Scanning Calorimetry ◽

Decagonal Quasicrystal ◽

Glass Forming

A pseudoternary alloy system was constructed by combining icosahedral quasicrystal (IQC), decagonal quasicrystal (DQC), and Zr into one alloy system. Different proportions of Zr were added into pseudobinary alloy IQC80DQC20 (in wt.%). The structural evolution in these alloys is discussed. An amorphous alloy composition was found in this system. Melt-spinning amorphous alloy was produced in this composition. Through differential scanning calorimetry experiments, the amorphous alloy exhibited a high glass-forming ability comparable to that of the Inoue alloy Zr65Al7.5Cu17.5Ni10.

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Investigation of the Bulk Nd60-xDyxFe30Al10 (x=0, 2, 5) Amorphous Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.3393 ◽

2005 ◽

Vol 475-479 ◽

pp. 3393-3396

Author(s):

Hui Xu ◽

Xiao Hua Tan ◽

Nannan Qi ◽

Qing Wang ◽

Yuanda Dong

Keyword(s):

Saturation Magnetization ◽

Amorphous Alloys ◽

Magnetic Behavior ◽

Glass Forming Ability ◽

X Ray Diffraction ◽

Soft Magnetic ◽

Scanning Calorimetry ◽

X Ray ◽

Glass Forming ◽

Intrinsic Coercivity

The glass-forming ability, thermal stability and magnetic properties of the Nd60-xDyxFe30Al10 (x=0, 2, 5) bulk amorphous alloys were investigated by x-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscope (SEM) and the vibrating sample magnetometer (VSM). The results show that the glass forming ability of the Nd60-xDyxFe30Al10 (x=0, 2, 5) alloys decrease with increasing Dy content. The as-cast Nd60-xDyxFe30Al10 (x=0, 2, 5) alloys show hard magnetic behavior at room temperature. With increasing Dy content, the intrinsic coercivity of the alloys increase significantly while the saturation magnetization and remanence of the alloys decrease monotonously. With increasing annealed temperature, the intrinsic coercivity of the Nd55Fe30Al10Dy5 alloy decreased significantly, while the saturation magnetization and remanence decrease monotonously. The Nd55Fe30Al10Dy5 alloy shows soft magnetic behavior after annealed at 773K for 30 min.

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