rare earth addition

Rare-earth element - Wikipedia

A rare-earth element (REE) or rare-earth metal (REM), as defined by the International Union of Pure and Applied Chemistry, is one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium. ...

SpringerLink - Influence of rare earth (Ce and La) addition …

2017/06/29· Abstract The influences of rare earth elements (cerium and lanthanum) on the microstructure and phases of Al-3.0 wt%Mg alloys used for electromagnetic shielding wire were characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD) and differential scanning calorimetry (DSC).

Influence of the Addition of Rare-Earth Elements on …

Materials and methods A series of WC/10Co + rare-earth powder mixtures, with La2O3 and CeO2 additions up 3%, were prepared (Table 1). In addition, carbon black was used in order to adjustment of the carbon content. Paraffin

Rare-Earth-Catalyzed C–H Bond Addition of Pyridines to ...

2011/08/19· An efficient and general protocol for the ortho-alkylation of pyridines via C–H addition to olefins has been developed, using cationic half-sandwich rare-earth catalysts, which provides an atom-economical method for the synthesis of alkylated pyridine derivatives. A wide range of pyridine and olefin substrates including α-olefins, …

(PDF) Effects of rare earth addition on microstructure …

2014/07/01· The microstructure and mechanical properties of a Fe–15Mn–1.5Al–0.6C TWIP steel with and without rare earth (RE) addition were investigated. The RE-alloyed steel showed both improved tensile ...

The Influence of Rare Earth Addition on Cast Magnesium Alloy

The addition of rare earth metals in magnesium alloys greatly improves the creep resistance, the strength properties both at room temperatures and elevated temperatures and the castability of Magnesium Alloy.

Erratum: Chiral rare earth metal complex-catalyzed …

Erratum : Chiral rare earth metal complex-catalyzed conjugate addition of O-alkylhydroxylamines. An efficient synthetic entry into optically active 2-acyl aziridines (Tetrahedron (2002) 58 (8321) PII: S0040402002009833). / Jin, Xiu Lan ...

KAKEN — Research Projects | Improvmemnt of …

Large magnetically induced strain of a few % has been reported for martensitic phase in ferromagnetic shape memory alloys, caused by rearrangement of martensitic twins. In order to improve the output power by this mechanism it is necessary to increase saturation magnetization and magnetic anisotropy and to decrease twinning stress.In the present investigation, effect of addition of rare earth ...

Different Influences of Rare Earth Eu Addition on …

2019/10/25· Different Influences of Rare Earth Eu Addition on Primary Si Refinement in Hypereutectic Al-Si Alloys with Varied Purity. Mao F(1), Wei S(1), Ou L(2), Zhang C(1), Chen C(1), Wang X(1), Cao Z(3). Author information: (1)National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials, Henan …

Effects of rare earth addition on microstructure of C–Mn …

2015/04/25· Request PDF | Effects of rare earth addition on microstructure of C–Mn steel | The microstructures were observed in C Mn steel and statistical analysis of the inclusions produced when trace ...

Effect of Simultaneous Addition of Magnesium and Rare Earth ...

Effect of Simultaneous Addition of Magnesium and Rare Earth Alloy on the Manufacturing of Nodular Graphite Cast Iron HOMMA Masao, ICHIMURA Hajime Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy 19, 1-20, 1967

Roles of minor rare-earth elements addition in …

In this paper, within a limited composition range (⩽4 at.%) addition of rare-earth elements in Cu 47 Zr 45 Al 8 alloy, which can be made into fully glassy rod of 15 mm in diameter by means of tilt-mold casting, we systemically 47 Zr

SpringerLink - Rare-Earth Recovery from Soda Lime …

2016/03/28· Many rare-earth elements are incorporated into fine glass particles found in glass-polishing sludge and wasted without further exploitation. This study attempts to recover rare-earth element from simulated glass particles. For this purpose, a series of P2O5 concentrations were added to glass cullet doped with Eu2O3, followed by melting and cooling to room temperature. Recovery of rare-earth ...

The Influence of Rare Earth Addition on Cast Magnesium ...

2019/05/22· The addition of rare earth metals in magnesium alloys greatly improves the creep resistance, the strength properties both at room temperatures and elevated temperatures and the castability of Magnesium Alloy. Below are three

Enantioselective C H Bond Addition of Pyridines to …

rare earth alkyl complexes and their application to the catalytic enantioselective C−H addition of pyridines to alkenes. We found that the chiral half-sandwich scandium alkyl complexes can act as excellent catalysts for the 2 C ...

Different Influences of Rare Earth Eu Addition on …

Different Influences of Rare Earth Eu Addition on Primary Si Refinement in Hypereutectic Al–Si Alloys with Varied Purity by Feng Mao 1, Shizhong Wei 1,*, Ou 2, Cheng Zhang 1, Chong Chen 1, Xiaodong Wang 1 and Zhiqiang Cao 3,*

Different Influences of Rare Earth Eu Addition on …

materials Article Di erent Influences of Rare Earth Eu Addition on Primary Si Refinement in Hypereutectic Al–Si Alloys with Varied Purity Feng Mao 1, Shizhong Wei 1,*, Ou 2, Cheng Zhang 1, Chong Chen 1, Xiaodong Wang 1 and ...

Technical Introduction to the Use of Rare Earth …

Consider adding a separate source of rare earth addition (rare earth silicide or Cerium mischmetal) when necessary. Use advanced thermal analysis (ATAS®) to monitor the metallurgical process. Asmet's Range of Rare Earth

Enhancement of the red emission in CaTiO :Pr3+ by …

Enhancement of the red emission in CaTiO 3:Pr 3+ by addition of rare earth oxides Xianmin Zhang a,b, Jiahua Zhang a,*, Xia Zhang a, Li Chen a,b, Yongshi Luo a,b, Xiao-jun Wang a,c,* a Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, ...

rare-earth element | Uses, Properties, & Facts | Britannica

2018/07/08· Rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 (scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table (cerium [Ce] through lutetium [Lu]). [Lu]).

REE - Rare Earth Elements - Metals, Minerals, Mining, Uses

A rare-earth element (REE) or rare-earth metal (REM), as defined by the International Union of Pure and Applied Chemistry, is one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium. ...

Effects of Rare Earth Addition on the Inclusions and ...

Effects of Rare Earth Addition on the Inclusions and Mechanical Properties of 2205 Duplex Stainless Steel p.463 Study of the Metallographic of Nickel-Titanium Alloy Material by Using Electrochemical Polish p.469 p.473 2 O 4 ...

Effects of rare earth Er addition on microstructure and ...

2015/01/22· Subsequently, a nominal addition amount (0.3, 0.5, and 0.8 wt%) of the rare earth Er was added into the melt at 750 1C, wrapped in aluminum foil, stirred and held for 20 min to ensure the homogeneity of composition. After the

Effect of zinc and rare-earth element addition on …

Effect of zinc and rare-earth element addition on mechanical, corrosion, and biological properties of magnesium - Volume 33 Issue 20 - Rakesh Rajan Kottuparambil, Srikanth Bontha, Ramesh Motagondanahalli Rangarasaiah, Shashi Bhushan Arya, Anuradha Jana, Mitun Das, Vamsi Krishna Balla, Srinivasan Amrithalingam, T. Ram Prabhu

Rare Earth Addition - an overview | ScienceDirect Topics

In addition, rare earth additions can lead to an increase in the upper shelf toughness and this effect is due to the inclusions being larger and more widely spaced when rare earths are added than when the sulfur is gettered as20, 28].

Evolution Mechanism of Inclusions in H13 Steel with Rare ...

Rare earth metals have strong affinity with O and S in molten steel. However, due to high density of rare earth inclusions close to that of molten steel, rare earth inclusions are not easy to float up and it is not conducive to take away O and S.

Effect of rare earth cerium addition on the …

2015/01/22· In addition, Cheng et al. [34] has reported that the elongation of Al–20%Si alloy increased by 40% from 0.35% to 0.48% using complex modi?ers of phosphor and rare earth elements. The results show that rare earth Ce is effective

Mechanism of Permeation of Rare Earth Metal Ions …

/ Mechanism of Permeation of Rare Earth Metal Ions through Supported Liquid Membrane with Addition of Chelating Reagent to Stripping Phase. :: Nippon Kagaku Kaishi . 1993 ; 1993, 5. pp. 574-578.

Effects of Rare Earth Metal Addition on Wear …

indicated that the addition of rare earth metals had a positive effect on the abrasion behaviour of G17CrMo5-5 cast steel. Keywords: Wear resistant alloys, Cast steel, Rare earth metals, Miller test, Surface profile 1. Introduction

Intermolecular addition of alcohols to carbodiimides …

A novel catalytic behavior of simple rare-earth metal amides RE[N(SiMe3)2]3 (RE = La(1), Nd(2), Sm(3), Yb(4), Y(5)) in the intermolecular addition of alcohols to carbodiimides was disclosed. A series of isoureas were obtained in good