Investigation on the Reaction of Refractories with 16MnRE Steel

2013 ◽  
Vol 575-576 ◽  
pp. 423-426
Author(s):  
Dong Wang ◽  
Ye Feng Guan
Keyword(s):  
Rare Earth ◽  
Fused Silica ◽  
High Alumina ◽  
Zircon Nozzle ◽  
Nozzle Blockage ◽  
Al Addition ◽  
The Relationship

When teeming rare earth treated steels the nozzle blockage occurred so frequently that seriously interferes the application of RE in steels. In this study we tried to investigate the relationship between the wettablility of 16MnRE steel and nozzle materials. The results showed that the weakest wettability of steel liquid was observed on fused silica among the six nozzle materials. Next came zircon and high-alumina nozzle. It has no obvious difference between the 16MnRE steels when final deoxidized containing and not containing Al addition. The wettability of 10Ti steel was weaker than 16MnRE steels on zircon nozzle. The clay nozzle was corroded by the precipitate from steel liquid.

scholarly journals Effect of Al addition to Rapidly Solidified Mg-Cu-Rare Earth Alloys

2016 ◽  
Vol 19 (suppl 1) ◽  
pp. 2-7 ◽  
Author(s):  
Silvia Rozenberg ◽  
Fernando Audebert ◽  
Marina Galano ◽  
Isabel Vergara Ogando ◽  
Cecilia Mendive
Keyword(s):  
Rare Earth ◽  
Rare Earth Alloys ◽  
Al Addition ◽  
Rapidly Solidified

Modification in Texture of Magnesium by the Addition of Rare Earth Elements and its Influence on Mechanical Properties

2012 ◽  
Vol 736 ◽  
pp. 307-315 ◽  
Author(s):  
Murugavel Suresh ◽  
Satyam Suwas
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Magnesium Alloys ◽  
Aluminium Alloys ◽  
Room Temperature ◽  
Main Obstacle ◽  
Rare Earth Addition ◽  
Structural Applications ◽  
Re Elements ◽  
The Relationship

Mg alloys show limited room temperature formability compared to its lightweight counterpart aluminium alloys, which is a main obstacle in using this metal for most of the structural applications. However, it is known that grain refinement and texture control are the two possibilities for the improvement of formability of magnesium alloys. Amongst the approaches attempted for the texture weakening, additions through of rare-earth (RE) elements have been found most effective. The relationship between the texture and ductility is well established. In this paper, the effect of rare earth addition on texture weakening has been summarized for various magnesium alloys under the two most common modes of deformation methods.

scholarly journals Petrogenesis of the post-collisional porphyritic granitoids from Jhalida, Chhotanagpur Gneissic Complex, eastern India

2020 ◽  
pp. 1-37
Author(s):  
Poulami Roy ◽  
Bapi Goswami ◽  
Sukanya Dutta ◽  
Chittaranjan Bhattacharyya
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
High Alumina ◽  
Strong Negative Correlation ◽  
Porphyritic Granite ◽  
High K ◽  
Granitoid Magma ◽  
Heavy Rare Earth Elements ◽  
Set Up ◽  
Batch Melting

Abstract The Jhalida porphyritic granitoid pluton is exposed in a regional shear zone belonging to the Chhotanagpur Gneissic Complex of the Satpura Orogen (c. 1.0 Ga), regarded as the collisional suture between the South and North Indian blocks. The pluton intruded the migmatitic gneisses, metapelites, calc-silicate rocks and amphibolites belonging to the amphibolite facies. The mineral assemblage indicates the calc-alkaline nature of the granitoids. Mafic (Pl–Qz–Bt±Hbl) schists occur as xenoliths within the pluton. The granitoids are classified as alkali-calcic to alkalic, dominantly magnesian grading to ferroan, metaluminous to slightly peraluminous, and shoshonitic to ultrapotassic. Geochemically, the granitoids are enriched in large-ion lithophile elements (LILE), particularly K, and light rare earth elements (LREE), but are comparatively depleted in Nb, Ta, and heavy rare earth elements (HREE). The strong negative correlation between SiO2 and P2O5, metaluminous to weakly peraluminous character, high liquidus temperature (798–891°C) and high fO2 (ΔQFM +0.8 to +1.6) of the melt suggest their I-type nature. Field relations and tectonic discrimination diagrams imply their post-collisional emplacement. Low Nb/U (average 8.5), Ce/Pb (average 9.0), and Al2O3/(Al2O3 + FeO(t) + MgO + TiO2) ratios and relatively low Mg number (average 0.15) of these granitoids indicate a crustal mafic source. Batch melting (at 825–950°C) of 10–20% of an old, incompatible elements-rich high-K high-alumina hornblende granulite can generate the porphyritic granite melt. The heat source for melting was an upwelling of the asthenospheric mantle in the post-collisional set-up. Textural and chemical characteristics of the mafic xenoliths show that invading porphyritic granitoid magma metasomatized the amphibolite protoliths.

Interface Reaction between Nd2O3 and Alumina Single Crystal

2015 ◽  
Vol 1104 ◽  
pp. 21-25
Author(s):  
Si Long Bi ◽  
Bo Lin Wu ◽  
Yang Wu
Keyword(s):  
Rare Earth ◽  
Wear Rate ◽  
Single Crystal ◽  
Grain Boundaries ◽  
Interface Reaction ◽  
High Alumina ◽  
Compact Structure ◽  
Abrasive Resistance ◽  
High Alumina Content ◽  
Wear And Tear

A kind of high alumina content ceramic stand wear and tear has been designed. The interface chemical reaction between single crystal alumina (in order to eliminate the influence of grain boundaries) and Nd2O3 powder has been observed. Microstructure and wear rate of the ceramic were investigated by SEM and by a purposely designed experimental device for the measurement of wear rate. Perimental results showed that a rare earth aluminate formed on the interface and the wear rate of a sample has reduced by 34%. The newly formed compound and single crystal alumina formed a compact structure which could make the grain boundaries strengthened and also lead to a beneficial effect on the elimination of pore and the density of the ceramic, at the same time improve abrasive resistance.

The relationship between magnetism and magneto-optical effects in rare earth doped aluminophosphate glasses

2016 ◽  
Vol 49 (7) ◽  
pp. 075001 ◽  
Author(s):  
M Valeanu ◽  
M Sofronie ◽  
A C Galca ◽  
F Tolea ◽  
M Elisa ◽  
...  
Keyword(s):  
Rare Earth ◽  
Optical Effects ◽  
Aluminophosphate Glasses ◽  
The Relationship ◽  
Rare Earth Doped

The Effect of Different Doping Methods of Sintering Aids on the Barium Titanate Based X7R Ceramics

2007 ◽  
Vol 336-338 ◽  
pp. 83-86 ◽  
Author(s):  
C. Ma ◽  
X.H. Wang ◽  
R.Z. Chen ◽  
Long Tu Li ◽  
Zhi Lun Gui
Keyword(s):  
Rare Earth ◽  
Dielectric Loss ◽  
Barium Titanate ◽  
Low Temperature ◽  
Rare Earth Oxide ◽  
Sintering Aids ◽  
Sintering Properties ◽  
Relationship Of ◽  
The Relationship

The barium titanate based X7R ceramics, which are doped with rare earth oxide, Nb2O5, Co3O4 and ZnO-B2O3, could be sintered at a rather low temperature to satisfy the X7R requirements with good permittivity and dielectric loss. In this paper, different doping methods of sintering aids have been used to prepare X7R BaTiO3 ceramics. Samples were sintered at a low temperature and the relationship of doping methods and sintering properties has been concluded.

Preparation and Characterization of Layered Rare Earth Compound

2014 ◽  
Vol 633 ◽  
pp. 73-76
Author(s):  
Lin Zhang ◽  
Wei Yang ◽  
Yan Yan Zhang ◽  
Wang Yan Shi ◽  
Dan Yu Jiang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fluorescence Intensity ◽  
Hydrothermal Reaction ◽  
Organic Anion ◽  
Electric Dipole Transition ◽  
Organic Anions ◽  
Layered Compound ◽  
Luminescent Center ◽  
Rare Earth Compound ◽  
The Relationship

We prepared a series of organic acids pillared layered rare earth compounds Y2-xEux(OH)5X·nH2O (X= Organic acid) by hydrothermal reaction, The distance of layers was determined by X-ray diffraction, and discussed the relationship between the intercalated organic anion and the distance between the layers, In addition, the layered rare earth compound we prepared exhibited good fluorescence properties, being excited by ultraviolet light, the layered compound exhibited characteristic fluorescence spectra of Eu3+ions. But the fluorescence intensity of the layered compound changed with different intercalated organic anions, by the ratio of the electric dipole transition and magnetic dipole transitions (5D0-7F2)/ (5D0-7F1), we studied the coordination environment of the luminescent center. And discussed the relationship between intercalated organic anions and fluorescence intensity.

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