Viscosity Measurements for La-Al-Ni liquid Alloys by an Oscillating Crucible Method

1998 ◽  
Vol 554 ◽  
Author(s):  
Tohru Yamasaki ◽  
Tomohiro Tatibana ◽  
Yoshikiyo Ogino ◽  
Akihisa Inoue
Keyword(s):  
Activation Energy ◽  
Viscous Flow ◽  
Melting Temperature ◽  
Glass Forming Ability ◽  
Liquid Alloys ◽  
Temperature Range ◽  
Glass Forming ◽  
Ni Alloys ◽  
Ni Content ◽  
Ni Alloy

AbstractThe viscosity of liquid lanthanum-based and aluminum-based La-Al-Ni alloys has been measured by an oscillating crucible method of the inverse suspending type in the temperature range from melting temperature (Tm) up to about 1400 K. In the case of La55Al45-xNix (x = 10∼40 at. %) alloys, the viscosity increased with increasing Ni content up to about 20 at. % Ni and then decreased with increasing the Ni content, while the activation energy for viscous flow decreased to a minimum value at about 20 at. % Ni. This composition is well consistent with that of the La-Al-Ni alloy having largest glass-forming ability.

Glass forming ability criteria for La–Al–(Cu,Ni) alloys

2006 ◽  
Vol 352 (52-54) ◽  
pp. 5482-5486 ◽  
Author(s):  
Y. Zhang ◽  
Y. Li ◽  
H. Tan ◽  
G.L. Chen ◽  
H.A. Davies
Keyword(s):  
Glass Forming Ability ◽  
Glass Forming ◽  
Ni Alloys

Effect of Ga substitution on the crystallization behaviour and glass forming ability of Zr–Al–Cu–Ni alloys

2010 ◽  
Vol 527 (3) ◽  
pp. 469-473 ◽  
Author(s):  
Devinder Singh ◽  
T.P. Yadav ◽  
R.K. Mandal ◽  
R.S. Tiwari ◽  
O.N. Srivastava
Keyword(s):  
Glass Forming Ability ◽  
Crystallization Behaviour ◽  
Glass Forming ◽  
Ni Alloys ◽  
Ga Substitution

Structure of Zr-Cu and Zr-Ni Liquid Alloys Studied by High-Energy X-Ray Diffraction

2007 ◽  
Vol 561-565 ◽  
pp. 1349-1352 ◽  
Author(s):  
Akitoshi Mizuno ◽  
T. Kaneko ◽  
Seiichi Matsumura ◽  
Masahito Watanabe ◽  
Shinji Kohara ◽  
...  
Keyword(s):  
Liquid Structure ◽  
High Energy ◽  
Glass Forming Ability ◽  
Liquid Alloys ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Forming ◽  
Structure Factors ◽  
Asymmetric Shape ◽  
Second Peak

In order to obtain an insight into the high glass-forming ability of bulk metallic glasses, we have analyzed liquid structures of the Zr-Cu and the Zr-Ni binary alloys with different compositions. High-energy (E = 113 keV) x-ray diffraction experiments were carried out for the liquid alloys levitated by a conical nozzle levitation (CNL) technique. While a peculiar shoulder on the second peak was observed in the structure factors of the Zr-Cu liquid alloys, those of the Zr70Ni30 and the Zr50Ni50 liquids exhibit an asymmetric shape of the second peak. In addition, it was found that the effect of concentration variation in the liquid Zr-Ni alloys was significantly different from that of the liquid Zr-Cu alloys. The liquid structure analyses using the reverse Monte Carlo (RMC) simulation have clarified that a degree of the short-range correlation between the constituents in the liquids affects substantially the glass-forming ability of the binary Zr alloys.

scholarly journals Impact of Short-Range Clustering on the Multistage Work-Hardening Behavior in Cu–Ni Alloys

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 151 ◽  
Author(s):  
Dong Han ◽  
Jin-Xian He ◽  
Xian-Jun Guan ◽  
Yan-Jie Zhang ◽  
Xiao-Wu Li
Keyword(s):  
Work Hardening ◽  
Short Range ◽  
Strain Range ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Ni Alloys ◽  
Hardening Process ◽  
Ni Content ◽  
Ni Alloy ◽  
Work Hardening Rate

The work-hardening behavior of Cu–Ni alloys with high stacking-fault energies (SFEs) is experimentally investigated under uniaxial compression. It is found that, with the increase of Ni content (or short-range clustering, SRC), the flow stress of Cu–Ni alloys is significantly increased, which is mainly attributed to an enhanced contribution of work-hardening. An unexpected multistage (including Stages A, B, and C) work-hardening process was found in this alloy, and such a work-hardening behavior is essentially related to the existence of SRC structures in alloys. Specifically, during deformation in Stage B (within the strain range of 0.04–0.07), the forming tendency to planar-slip dislocation structures becomes enhanced with an increase of SRC content (namely, increase of Ni content), leading to the occurrence of work-hardening rate recovery in the Cu–20at.% Ni alloy. In short, increasing SRC in the Cu–Ni alloy can trigger an unexpected multistage work-hardening process, and thus improve its work-hardening capacity.

The relation between formation of compounds and glass forming ability for Zr–Al–Ni alloys

2003 ◽  
Vol 57 (12) ◽  
pp. 1840-1843 ◽  
Author(s):  
Z.J Yan ◽  
J.F Li ◽  
S.R He ◽  
Y.H Zhou
Keyword(s):  
Glass Forming Ability ◽  
Glass Forming ◽  
Ni Alloys

scholarly journals A comparison of the activation energy of viscous flow for hen egg-white lysozyme obtained on the basis of different models of viscosity for glass-forming liquids

2011 ◽  
Vol 34 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Karol Monkos
Keyword(s):  
Activation Energy ◽  
Viscous Flow ◽  
Egg White ◽  
Hen Egg White Lysozyme ◽  
Glass Forming ◽  
Egg White Lysozyme ◽  
Wide Range ◽  
Different Temperatures ◽  
Hen Egg White ◽  
Hen Egg

A comparison of the activation energy of viscous flow for hen egg-white lysozyme obtained on the basis of different models of viscosity for glass-forming liquids The paper presents the results of viscosity determinations on aqueous solutions of hen egg-white lysozyme at a wide range of concentrations and at temperatures ranging from 5°C to 55°C. On the basis of these measurements and different models of viscosity for glass-forming liquids, the activation energy of viscous flow for solutions and the studied protein, at different temperatures, was calculated. The analysis of the results obtained shows that the activation energy monotonically decreases with increasing temperature both for solutions and the studied protein. The numerical values of the activation energy for lysozyme, calculated on the basis of discussed models, are very similar in the range of temperatures from 5°C to 35°C.

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