Two main and a new type rare earth elements in Mg alloys: A review

Applications of nanomaterials will become the leading technology during the next decades of this century. The composite nanomagnet, which has better features, lower cost and is less demanding of rare earth elements, is a new type of permanent magnetic material. It has become one of the important developments of the nanomagnet generator. In this paper, we apply this nanomagnet in a magnetic setback generator and simulate its electromotive force using COMSOL Multiphysic, comparing it with traditional generators. We find it is better than the traditional option in performance, with obvious advantage in respect of cost.

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A new type of rare earth elements deposit in weathering crust of Permian basalt in western Guizhou, NW China

Journal of Rare Earths ◽

10.1016/s1002-0721(08)60177-5 ◽

2008 ◽

Vol 26 (5) ◽

pp. 753-759 ◽

Cited By ~ 17

Author(s):

Ruidong YANG ◽

Wei WANG ◽

Xiaodong ZHANG ◽

Ling LIU ◽

Huairui WEI ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Weathering Crust ◽

Nw China ◽

New Type ◽

Western Guizhou

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Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review

10.20944/preprints202108.0578.v1 ◽

2021 ◽

Author(s):

Laihao Yu ◽

Yingyi Zhang ◽

Tao Fu ◽

Jie Wang ◽

Kunkun Cui ◽

...

Keyword(s):

Rare Earth ◽

High Temperature ◽

Rare Earth Elements ◽

Oxidation Behavior ◽

Strengthening Mechanism ◽

Advanced Materials ◽

Performance Requirements ◽

Large Numbers ◽

High Temperature Structural Material ◽

New Type

Traditional refractory materials such as nickel-based superalloys have been gradually unable to meet the performance requirements of advanced materials. The Mo-Si-based alloy, as a new type of high temperature structural material, has entered the vision of researchers due to its charming high temperature performance characteristics. However, its easy oxidation and even "pesting oxidation" at medium temperatures limit its further applications. In order to solve this problem, researchers have conducted large numbers of experiments and made breakthrough achievements. Based on these research results, the effects of rare earth elements like La, Hf, Ce and Y on the microstructure and oxidation behavior of Mo-Si-based alloys were systematically reviewed in the current work. Meanwhile, this paper also provided an analysis about the strengthening mechanism of rare earth elements on the oxidation behavior for Mo-Si-based alloys after discussing the oxidation process. Furthermore, the research focus about the oxidation protection of Mo-Si-based alloys in the future was prospected to expand the application field.

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Rare earth elements in self-shielded flux-cored wires and their effect on the weld toughing of U75V rail steel

International Journal of Modern Physics B ◽

10.1142/s0217979220400548 ◽

2019 ◽

Vol 34 (01n03) ◽

pp. 2040054

Author(s):

Jia Chen ◽

Jiafan Ye ◽

Guoqing Gou ◽

Wei Gao

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

High Efficiency ◽

Rail Steel ◽

Cored Wire ◽

New Type ◽

High Alkalinity ◽

Cored Wires ◽

The Impact ◽

Addition Amount

Self-shielded flux-cored wire is a new type of welding material that has the advantages of outdoor and high-efficiency application, and it has been used widely for rail repair. A self-shielded flux-cored wire with high alkalinity and rare earth elements was taken for research, and the microstructure, inclusions, hardness and the impact toughness were studied. Rare earth elements could eliminate the oxygen and sulfur when they were added into the molten pool. The addition amount has been optimized to the range of 4% in the self-shielded flux-cored wire when used for rail repairing.

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A review of the physiological impact of rare earth elements and their uses in biomedical Mg alloys

Acta Biomaterialia ◽

10.1016/j.actbio.2021.06.004 ◽

2021 ◽

Author(s):

Weijie Weng ◽

Arne Biesiekierski ◽

Yuncang Li ◽

Matthew Dargusch ◽

Cuie Wen

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Mg Alloys ◽

Physiological Impact

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Effects of Different Rare Earth Elements on the Degradation and Mechanical Properties of the ECAP Extruded Mg Alloys

Materials ◽

10.3390/ma15020627 ◽

2022 ◽

Vol 15 (2) ◽

pp. 627

Author(s):

Junxiu Chen ◽

Jie Zhan ◽

Sharafadeen Kunle Kolawole ◽

Lili Tan ◽

Ke Yang ◽

...

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Rare Earth ◽

Rare Earth Elements ◽

Microstructural Characterization ◽

Immersion Test ◽

Mg Alloys ◽

Cytotoxicity Test ◽

Angular Pressing ◽

Yttrium Addition

Effects of different rare earth elements on the degradation and mechanical properties of the ECAP (equal channel angular pressing) extruded Mg alloys were investigated in this work. Microstructural characterization, thermodynamic calculation, a tensile test, an electrochemical test, an immersion test, a hydrogen evolution test and a cytotoxicity test were carried out. The results showed that yttrium addition was beneficial to the improvement of the alloy’s strength, and the ultimate tensile strength (UTS) and yield strength (YS) values of the ECAPed Mg-2Zn-0.5Y-0.5Zr alloy reached 315 MPa and 295 MPa, respectively. In addition, Nd was beneficial to the corrosion resistance, for which, the corrosion rate of the ECAPed Mg-2Zn-0.5Nd-0.5Zr alloy was observed to be 0.42 ± 0.04 mm/year in Hank’s solution after 14 days of immersion. Gd was moderate in improving both the corrosion resistance and mechanical properties. Moreover, after co-culturing with murine calvarial preosteoblasts (MC3T3-E1) cells, the ECAPed Mg-2Zn-0.5RE (Nd, Gd, Y)-0.5Zr alloys exhibited good cytocompatibility with a grade 1 cytotoxicity. Consequently, the ECAPed Mg-2Zn-0.5Nd-0.5Zr alloy showed the best application prospect in the field of orthopedics.

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