Atomistic diffusion mechanism of rare earth carburizing/nitriding on iron-based alloy

2019 ◽  
Vol 484 ◽  
pp. 710-715 ◽  
Author(s):  
Yuan You ◽  
Jihong Yan ◽  
Mufu Yan
Keyword(s):  
Rare Earth ◽  
Diffusion Mechanism ◽  
Iron Based

scholarly journals Comparison of Jump Frequencies of 111In/Cd Tracer Atoms in Sn3R and In3R Phases Having the L12 Structure (R = Rare-Earth)

2011 ◽  
Vol 311 ◽  
pp. 159-166 ◽  
Author(s):  
Megan Lockwood Harberts ◽  
Benjamin Norman ◽  
Randal Newhouse ◽  
Gary S. Collins
Keyword(s):  
Rare Earth ◽  
Perturbed Angular Correlation ◽  
Diffusion Mechanism ◽  
Correlation Spectroscopy ◽  
Perturbed Angular Correlation Spectroscopy ◽  
Dominant Mechanism ◽  
Boundary Composition ◽  
Light Lanthanide ◽  
Diffusion Mechanisms ◽  
Jump Frequencies

Measurements were made of jump frequencies of 111In/Cd tracer atoms on the Sn-sublattice in rare-earth tri-stannides having the L12 crystal structure via perturbed angular correlation spectroscopy (PAC). Phases studied were Sn3R (R= La, Ce, Pr, Nd, Sm and Gd). Earlier measurements on isostructural rare-earth tri-indides showed that the dominant diffusion mechanism changed along that series [4]. The dominant mechanism was determined by comparing jump frequencies measured at opposing phase boundary compositions (that is, more In-rich and more In-poor). Jump frequencies were observed to be greater at the In-rich boundary composition in light lanthanide indides and greater at the In-poor boundary composition in heavy-lanthanide indides. These observations were attributed to predominance of diffusion via rare-earth vacancies in the former case and indium vacancies in the latter. Contrary to results for the indides, jump frequencies found in the present work are greater for the Sn-poor boundary compositions of the stannides, signaling that diffusive jumps are controlled by Sn-vacancies. Possible origins of these differences in diffusion mechanisms are discussed.

scholarly journals Effects of rare-earth oxides on the microstructure and properties of Fe-based friction materials synthesized by in situ carbothermic reaction from vanadium-bearing titanomagnetite concentrates

RSC Advances ◽  
2019 ◽  
Vol 9 (36) ◽  
pp. 20687-20697
Author(s):  
Dajun Zhai ◽  
Yue Shui ◽  
Keqin Feng ◽  
Yanyan Zhang
Keyword(s):  
Rare Earth ◽  
Tribological Properties ◽  
Rare Earth Oxides ◽  
Frictional Material ◽  
Friction Materials ◽  
Microstructure And Properties ◽  
Iron Based

In this work, we prepared an iron-based frictional material from vanadium-bearing titanomagnetite concentrates by in situ carbothermic reaction with improved tribological properties.

Modeling the impact–sliding wear characteristics of rare earth additive iron-based hardfacing alloys

2017 ◽  
Vol 231 (11) ◽  
pp. 1486-1499 ◽  
Author(s):  
Yogesh Kumar Singla ◽  
DK Dwivedi ◽  
Navneet Arora
Keyword(s):  
Rare Earth ◽  
Tribological Properties ◽  
Rare Earth Oxide ◽  
Oxide Content ◽  
Statistical Regression ◽  
Austenite Grain Size ◽  
Mechanical And Tribological Properties ◽  
Hardfacing Alloy ◽  
Iron Based ◽  
The Impact

This paper presents a systematic study of the effect of the cerium oxide content on the mechanical, microstructural and tribological properties of iron-based alloys. The results indicate that the microstructure of the hardfaced alloys is mainly composed of austenite, MC and M7C3 carbides. The primary austenite grain size was refined at first and then coarsened with the increase of the rare earth oxide additions. Meanwhile, the hardness of the hardfacing alloy was also increased. The increased area fraction of carbides was found to be beneficial for enhanced wear resistance. A statistical regression model was developed and verified with a number of test cases in order to evaluate the adequacy of the model. The optimal amount of rare earth was found to be less than 6 wt.%; below this composition, the microstructural, mechanical and tribological properties were excellent.

Removal of aqueous rare earth elements (REEs) using nano-iron based materials

2013 ◽  
Vol 19 (3) ◽  
pp. 898-907 ◽  
Author(s):  
S. Unal Yesiller ◽  
A.E. Eroğlu ◽  
T. Shahwan
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Iron Based

scholarly journals Electronic structures and Curie temperatures of iron-based rare-earth permanent-magnet compounds

1995 ◽  
Vol 51 (2) ◽  
pp. 1064-1072 ◽  
Author(s):  
J. P. Woods ◽  
B. M. Patterson ◽  
A. S. Fernando ◽  
S. S. Jaswal ◽  
D. Welipitiya ◽  
...  
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Electronic Structures ◽  
Iron Based ◽  
Curie Temperatures

MAGNETO-OPTIC KERR ROTATION OF RARE EARTH-IRON BASED ALLOYS

1994 ◽  
pp. 1011-1014
Author(s):  
Xiangyou Yu ◽  
Hideki Watabe ◽  
Satoshi Iwata ◽  
Shigeru Tsunashima ◽  
Susumu Uchiyama ◽  
...  
Keyword(s):  
Rare Earth ◽  
Kerr Rotation ◽  
Iron Based ◽  
Magneto Optic
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