Influence of Rare Earth Metals on Carburizing Kinetics of 21NiCrMo2 Steel

2015 ◽  
Vol 1114 ◽  
pp. 206-213 ◽  
Author(s):  
Daniela Dragomir ◽  
Mihai Cojocaru ◽  
Leontin Druga ◽  
Zoltán Kolozsváry ◽  
Andrei Berbecaru
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Rare Earth Metals ◽  
Layer Growth ◽  
Technical Literature ◽  
Metallic Material ◽  
Thermochemical Processing ◽  
Kinetics Of

The influence of rare-earth metals adsorbed in the surface of the metallic material subject to thermochemical processing as well as of those pre-added in the material matrix on the kinetics of layers growth is presented in the technical literature. It is generally concluded that the presence of rare earths is accelerating the kinetics of layer growth.

THE LIMITING HEAT OF SOLUTION OF PLUTONIUM IN SOME RARE EARTH METALS

1956 ◽  
Vol 34 (9) ◽  
pp. 1176-1181 ◽  
Author(s):  
D. E. McKenzie ◽  
W. M. Jenkinson ◽  
A. S. Denovan
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Rare Earth Metals ◽  
Heat Content ◽  
Maximum Error ◽  
Heat Of Solution ◽  
Commercial Preparation ◽  
Misch Metal

The distribution of plutonium between neutron-irradiated uranium and some rare earth metals has been examined as a function of temperature in the range 1160° to 1350 °C. The results are used to calculate [Formula: see text] the limiting partial molal heat content of plutonium, at 1250 °C. in lanthanum, cerium, neodymium, and a commercial preparation of mixed rare earths (misch metal). The following values (in kilocalories) were obtained: lanthanum 2.9, cerium 1.1, neodymium 0.0, and misch metal 1.1. The maximum error associated with these values is ±0.4 kilocalories.

Secondary Resources of Rare Еarth Мetals

2020 ◽  
Vol 24 (9) ◽  
pp. 44-50
Author(s):  
S.A. Chernyi
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Industrial Waste ◽  
Rare Earth Metals ◽  
Nickel Metal ◽  
Nickel Metal Hydride ◽  
Processing Technologies ◽  
Apatite Concentrate ◽  
Fluorescent Lamps ◽  
High Processing

The article provides an overview of the main existing methods for recycling rare earth metals from various types of waste. It was noted that the demand for rare-earth metals is increasing annually due to the growth of advanced technologies, mainly in the sectors of electronics, power engineering and photonics. It has been established that in countries producing final products of high processing, the chemical-technological processes of processing goods that have worked out their life cycle, and, first of all, fluorescent lamps, NdFeB magnets from electronic devices, and nickel-metal hydride (NiMeH) batteries containing rare earths are most quickly created. The most profitable and recycling option is the reuse of products containing rare-earth metals, however, such technologies are applicable for a narrow range of waste. Another important area of REM recycling is the processing of industrial waste. For countries with developed mining and chemical industries, mining processing technologies are attractive. It is shown that for Russia, more appropriate are schemes for the disposal of industrial waste, primarily waste from the production of apatite concentrate. The main problems of the development of REM recycling are identified: low content and dispersion of rare earths in waste; the presence of impurities that impede the extraction of valuable components and the toxicity of the used recycling schemes.

Kinetics of the Reduction of Rare Earth Metals in LiCl–KCl–CsCl Eutectic Melt

2018 ◽  
Vol 86 (14) ◽  
pp. 351-358
Author(s):  
Andrey V. Shchetinskiy ◽  
Ekaterina A. Kharina ◽  
Vladimir A. Volkovich ◽  
Alexander S. Dedyukhin ◽  
Alexander A. Ryzhov
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Kinetics Of ◽  
Eutectic Melt

Kinetics of the austenite transformation in Cr−Mo−V steel with microadditives of rare-earth metals

1988 ◽  
Vol 30 (1) ◽  
pp. 19-23
Author(s):  
K. A. Lanskaya ◽  
V. V. Yarovoi ◽  
O. V. Basargin ◽  
L. V. Kulikova
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Austenite Transformation ◽  
Kinetics Of

scholarly journals Corrosion Characteristics Of the Rare Earth and Yttrium Metals

CORROSION ◽  
1964 ◽  
Vol 20 (5) ◽  
pp. 145t-149t ◽  
Author(s):  
LINDA LEE ◽  
N. D. GREENE
Keyword(s):  
Weight Loss ◽  
Rare Earth ◽  
Weight Gain ◽  
Aqueous Solutions ◽  
Physical Properties ◽  
Corrosion Behavior ◽  
Rare Earths ◽  
Rare Earth Metals ◽  
Alkaline Solutions ◽  
Different Temperatures

Abstract The corrosion of rare earth metals in air, water, and aqueous solutions at different temperatures has been measured by conventional weight loss and weight gain tests. The metals oxidize slowly in air, corrode slowly in water and alkaline solutions, and are readily soluble in most acids. Correlations of corrosion behavior with the electronic and physical properties of the rare earths are discussed.

scholarly journals SORPTION OF RARE-EARTH METALS FROM NO EVAPORATED DIHYDRATE PHOSPHORIC ACID ON MACROPOROUS STRONGLY ACIDIC CATIONITE

2018 ◽  
Vol 59 (4) ◽  
pp. 50
Author(s):  
Aleksandr V. Firsov ◽  
Aleksandr V. Artamonov ◽  
Dar'ya N. Smirnova ◽  
Aleksandr P. Ilyin ◽  
Segreiy P. Kochetkov
Keyword(s):  
Rare Earth ◽  
Phosphoric Acid ◽  
Dynamic Characteristics ◽  
Rare Earths ◽  
Rare Earth Metals ◽  
Diffusion Region ◽  
External Diffusion

The kinetic and dynamic characteristics of the sorption of rare earths metals (REE) from no evaporated extration phosphoric acid (EPA) of dihydrate production on macroporous strongly acidic cation Rurolite C150 were investigated. The process of sorption of rare earth metals was established to take place in the external diffusion region.

scholarly journals On the molecular heat and volume of the rare earths and their sulphates

1881 ◽  
Vol 31 (206-211) ◽  
pp. 46-51
Keyword(s):  
Rare Earth ◽  
Physical Properties ◽  
Rare Earths ◽  
Royal Academy ◽  
Rare Earth Metals ◽  
Molecular Volume ◽  
Academy Of Sciences ◽  
The Rare Earth

At the request of the Royal Academy of Sciences at Stockholm, we some years ago undertook an extended research into the physical properties of the rare earth-metals and their compounds. Having performed the laborious task of separating and purifying their oxides, we are now able to publish our first series of determinations concerning their principal properties, which chemically are of the greatest im­portance, viz., molecular heat and molecular volume.

Are we underrating rare earths as an electrocatalyst? The effect of their substitution in palladium nanoparticles enhances the activity towards ethanol oxidation reaction

2017 ◽  
Vol 5 (44) ◽  
pp. 23369-23381 ◽  
Author(s):  
Saurav Ch. Sarma ◽  
Udumula Subbarao ◽  
Yatish Khulbe ◽  
Rajkumar Jana ◽  
Sebastian C. Peter
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Ethanol Oxidation ◽  
Rare Earth Metals ◽  
Ethanol Oxidation Reaction

The promotional effects of rare earth metals are exploited in enhancing the activity and stability of Pd towards the ethanol oxidation reaction both experimentally and theoretically.

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