Internal Oxidation of Rare Earth Additive Accelerating Aluminized Layer on Copper Matrix

2010 ◽  
Vol 139-141 ◽  
pp. 685-688
Author(s):  
Bao Hong Tian ◽  
Yi Zhang ◽  
Yong Liu ◽  
Feng Zhang Ren
Keyword(s):  
Rare Earth ◽  
Internal Oxidation ◽  
Gas Flow ◽  
Pure Copper ◽  
Composite Layer ◽  
Oxidation Mechanism ◽  
Rare Earth Oxide ◽  
Copper Matrix ◽  
Hardness Profile ◽  
Rare Earth Compound

The aluminizing treatment on the surface of commercial pure copper with addition of rare earth compound CeCl3 was carried out. The followed internal oxidation of the aluminized copper was also carried out in the industrial nitrogen gas flow. The influences of the aluminizing and internal oxidization processing time on the thickness, hardness profile and microstructure were investigated. Results show that the addition of rare earth oxide CeCl3 has great accelerating effect on the aluminizing and internal oxidation processing. The hardness of the surface Al2O3 dispersion hardened copper composite layer by means of internal oxidation with addition of rare earth compound is higher than that of the without addition. The internal oxidation mechanism of the aluminized layer on copper matrix is comprehensive processes of the oxygen inner-toward diffusion and localized internal oxidation of the inner-toward diffusion of aluminum.

Surface Aluminizing and Internal Oxidation of Cu-Al-Y Alloy

2007 ◽  
Vol 336-338 ◽  
pp. 2661-2663
Author(s):  
Xiao Hong Chen ◽  
Yan Li ◽  
Bao Hong Tian ◽  
Yi Zhang ◽  
Juan Hua Su ◽  
...  
Keyword(s):  
Rare Earth ◽  
Internal Oxidation ◽  
Rare Earth Oxide ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Layer Depth ◽  
Nitrogen Gas ◽  
Rare Earth Compound ◽  
Gas Medium ◽  
Commercial Nitrogen

A method of the aluminizing treatment on the surface of Cu-Al-Y alloy with addition of rare earth compound CeCl3 in 1173K was carried out. The followed internal oxidation of the aluminized Cu-Al-Y alloy was also carried out in the commercial nitrogen gas medium to generate Al2O3 dispersed hardening copper matrix composites. The hardness distribution in aluminized layer and microstructure were studied. Results show that the addition of rare earth oxide CeCl3 has great accelerating effect on the aluminizing, the aluminized layer deeper and uniform than that not add CeCl3 at the same condition. It is possible to generate Al2O3 particles dispersed hardening layer depth reached about 200μm in the surface of specimens with aluminizing and internal oxidation technique.

Experimental Study on Catalytic Reduction of SO2 by Rare Earth Compound

2014 ◽  
Vol 955-959 ◽  
pp. 2173-2176
Author(s):  
Zhe Hua Du
Keyword(s):  
Experimental Study ◽  
Rare Earth ◽  
Flue Gas ◽  
Elemental Sulfur ◽  
Catalytic Reduction ◽  
Rare Earth Oxide ◽  
Rare Earth Oxides ◽  
Activation Process ◽  
Oxide Mixture ◽  
Rare Earth Compound

Compared with a great deal of traditional desulphurization crafts, the catalytic reduction of SO2 with CO to elemental sulfur is considered to be the best technology for the removal of SO2 from flue gas. Adding rare earth oxide CeO2 with variable valences to La2O3 formed a mixture of rare earth oxides. By means of dipping CeO2, La2O3 and their mixture, whose carriers are allγ-Al2O3, are used as the catalyst for the reduction of SO2 by CO. The activation process of this catalyst without O2 was investigated. The result shows that the rare earth oxide mixture composing of CeO2 and La2O3, as the catalyst for the reduction of SO2 by CO, can remove SO2 mostly without O2.

scholarly journals Effect of rare earth oxide CeO2 on the anodic bonding performance of PEG-based MEMS encapsulation materials

2021 ◽  
Vol 13 (3) ◽  
pp. 168781402110077
Author(s):  
Chao Du ◽  
Cuirong Liu ◽  
Xu Yin ◽  
Haocheng Zhao
Keyword(s):  
Tensile Strength ◽  
Rare Earth ◽  
Rare Earth Oxide ◽  
Solid Polymer Electrolytes ◽  
Anodic Bonding ◽  
Solid Polymer ◽  
Bonding Layer ◽  
Scanning Calorimetry ◽  
Ion Migration ◽  
Bonding Performance

Herein, we synthesized a new polyethylene glycol (PEG)-based solid polymer electrolyte containing a rare earth oxide, CeO2, using mechanical metallurgy to prepare an encapsulation bonding material for MEMS. The effects of CeO2 content (0–15 wt.%) on the anodic bonding properties of the composites were investigated. Samples were analyzed and characterized by alternating current impedance spectroscopy, X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, tensile strength tests, and anodic bonding experiments. CeO2 reduced the crystallinity of the material, promoted ion migration, increased the conductivity, increased the peak current of the bonding process, and increased the tensile strength. The maximum bonding efficiency and optimal bonding layer were obtained at 8 wt% CeO2. This study expands the applications of solid polymer electrolytes as encapsulation bonding materials.

Internal oxidation in solid solutions Bi2.1-xPbxSr2-yCa1-zRy+zCu2O8+d (R = Y, Nd or La).

2004 ◽  
Vol 848 ◽  
Author(s):  
A.V. Garshev ◽  
A.V. Knotko ◽  
M.N. Pulkin ◽  
D.I. Kirdyankin ◽  
A.V. Geyer ◽  
...  
Keyword(s):  
Rare Earth ◽  
Chemical Analysis ◽  
Rare Earth Element ◽  
Internal Oxidation ◽  
Solid Solutions ◽  
Oxidation Kinetics ◽  
Earth Element ◽  
Isothermal Condition ◽  
Element Content ◽  
Rare Earth Element Content

ABSTRACTBi2-xPbxSr2CaCu2O8+d solid solutions with substitution of Sr or Ca by Y, Nd or La were fabricated at 760 - 79°C in N2-flow. The as-synthesized solutions were oxidized in air under isothermal condition and tested with XRD, TGA chemical analysis, TEM, XANES. Effect of rare-earth element content on oxidation kinetics and microstructure of the product is discussed.

scholarly journals On the resistance of rare earth oxide-doped YSZ to high temperature volcanic ash attack

2016 ◽  
Vol 307 ◽  
pp. 534-541 ◽  
Author(s):  
J. Xia ◽  
L. Yang ◽  
R.T. Wu ◽  
Y.C. Zhou ◽  
L. Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Volcanic Ash ◽  
Rare Earth Oxide

Wear resistance of hot-pressed Si3N4/SiC micro/nanocomposites sintered with rare-earth oxide additives

Wear ◽  
2010 ◽  
Vol 269 (11-12) ◽  
pp. 867-874 ◽  
Author(s):  
P. Tatarko ◽  
M. Kašiarová ◽  
J. Dusza ◽  
J. Morgiel ◽  
P. Šajgalík ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Rare Earth ◽  
Rare Earth Oxide
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