Effects of CeO2 on Melting Temperature, Viscosity and Structure of Mold Fluxes for Casting Rare Earths Alloyed Steels

2019 ◽  
pp. 381-391
Author(s):  
Zeyun Cai ◽  
Bo Song ◽  
Longfei Li ◽  
Zhen Liu
Keyword(s):  
Melting Temperature ◽  
Rare Earths ◽  
Mold Fluxes

scholarly journals Effect of Mixed Rare Earths on the Wetting Behavior and Interfacial Reaction between Sn-0.70Cu-0.05Ni Solder and Amorphous Fe84.3Si0.3B5.4 Alloy

2018 ◽  
Vol 206 ◽  
pp. 03005
Author(s):  
Bin Hou ◽  
Fengmei Liu ◽  
Hongqin Wang ◽  
Yupeng Zhang ◽  
Jianglong Yi ◽  
...  
Keyword(s):  
Intermetallic Compound ◽  
Melting Temperature ◽  
Solder Alloy ◽  
Interfacial Reaction ◽  
Rare Earths ◽  
Wetting Behavior ◽  
Amorphous Substrate ◽  
Continuous State ◽  
Amorphous Substrates ◽  
Limited Change

In order to explore the effect of addition of mixed rare earths (MRE) on the wetting behavior and interfacial reaction between Sn-0.70Cu-0.05Ni solder and amorphous Fe84.3Si10.3B5.4 alloy, 0.25 wt.% percentage of the MRE, which are mainly elements La and Ce, were added into the solder. Results show it can refine the microstructure of the solder alloy, and there is limited change of melting temperature with the addition of MRE in the solder. The wettability of the solder on amorphous substrate is improved by adding 0.25 wt.% percentage of the MRE into Sn-0.70Cu-0.05Ni solder. Moreover, research results indicate that, with the increase of wetting temperature, the final equilibrium wetting angles of Sn-0.70Cu-0.05Ni and Sn-0.70Cu-0.05Ni-0.25MRE on amorphous substrate decrease gradually, indicating the better wettability at the higher wetting temperature. In addition, with the increase of temperature, the distribution of intermetallic compound (IMC) FeSn2 formed at the interface between the two solders and amorphous substrate is changed from discontinuous state to continuous state. The thickness of the interfacial IMC layer between solder and amorphous substrates reduced with the addition of MRE, indicating that the presence of 0.25 wt.% percentage of the MRE is effective in suppressing the growth of IMC layer.

scholarly journals Effects of CeO2 on Viscosity, Structure, and Crystallization of Mold Fluxes for Casting Rare Earths Alloyed Steels

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 333 ◽  
Author(s):  
Zeyun Cai ◽  
Bo Song ◽  
Longfei Li ◽  
Zhen Liu ◽  
Xiaokang Cui
Keyword(s):  
Melting Temperature ◽  
Rail Steel ◽  
X Ray Diffraction ◽  
Viscous Property ◽  
X Ray ◽  
Rare Earth Alloy ◽  
Steel Continuous Casting ◽  
Mold Fluxes ◽  
Cylinder Method ◽  
Heavy Rail

The CaO-Al2O3-based mold fluxes are proposed for the Ce-bearing heavy rail steel continuous casting because of the low reactivity. Effects of CeO2 on the melting temperature, the viscous property, and the crystallization behavior of the CaO-Al2O3-Li2O-B2O3 mold fluxes were studied using hemisphere melting point method, rotating cylinder method, and X-ray diffraction (XRD) in the present work. The microstructure of the mold fluxes was analyzed by Fourier-transform infrared spectroscopy (FTIR). The results revealed that the addition of CeO2 would increase the melting temperature, but decrease the viscosity at each temperature due to its influence on increasing the depolymerization of the mold fluxes at high temperature. The precipitation of CaO was restrained and CaCeAlO4 generated with increasing CeO2 content since the crystal phases were affected by the microstructure of the melts. The change of the crystalline phases in mold fluxes influences the break temperature and the viscosity of the mold fluxes below the break temperature. These results obtained can provide guidelines for designing new mold fluxes for casting rare earth alloy heavy rail steels.

scholarly journals Effects of CeO2 on Melting Temperature, Viscosity, and Structure of CaF2-bearing and B2O3-containing Mold Fluxes for Casting Rare Earth Alloy Heavy Rail Steels

2019 ◽  
Vol 59 (7) ◽  
pp. 1242-1249 ◽  
Author(s):  
Zeyun Cai ◽  
Bo Song ◽  
Zhanbing Yang ◽  
Longfei Li
Keyword(s):  
Rare Earth ◽  
Melting Temperature ◽  
Rare Earth Alloy ◽  
Mold Fluxes ◽  
Heavy Rail

Incorporation of rare earths into II-VI compounds during MBE growth: Optical and EXAFS studies of Sm-doped ZnTe

1998 ◽  
Vol 184-185 (1-2) ◽  
pp. 119-123
Author(s):  
D Wruck
Keyword(s):  
Rare Earths ◽  
Mbe Growth

New Mode of Determining the Melting Temperature of Solids

1878 ◽  
Vol 6 (155supp) ◽  
pp. 2473-2473
Keyword(s):  
Melting Temperature

ANISOTROPIE ET MAGNÉTOSTRICTIONMAGNETOCRYSTALLINE ANISOTROPY IN RARE EARTHS AND THEIR ALLOYS

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-179-C1-185 ◽  
Author(s):  
S. CHIKAZUMI ◽  
K. TAJIMA ◽  
K. TOYAMA
Keyword(s):  
Rare Earths

REVIEW ON APPLICATIONS.The industry of metallic rare earths (R.E.)

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-269-C5-272
Author(s):  
P. Poirier
Keyword(s):  
Rare Earths

Magnetic susceptibility of dilute alloys of rare earths in magnesium

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-17-C5-18
Author(s):  
M. de Jong ◽  
P. Touborg ◽  
J. Bijvoet
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earths ◽  
Dilute Alloys

THERMOPOWER OF SOME IRON-RARE EARTHS COMPOUNDS FROM 2 K-1000 K

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-511-C2-512 ◽  
Author(s):  
E. Gratz ◽  
E. Bauer ◽  
S. Pöllinger ◽  
H. Nowotny ◽  
A. T. Burkov ◽  
...  
Keyword(s):  
Rare Earths ◽  
Rare Earths Compounds
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