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.

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.

scholarly journals Rare Earth Oxide CeO2 Decorated Graphene Nanoplatelets-Reinforced 2024 Aluminum Alloy Matrix Composites Fabricated by Pressure Sintering Process

2021 ◽  
Vol 11 (23) ◽  
pp. 11177
Author(s):  
Zhenghua Guo ◽  
Surui Li ◽  
Qingjie Wu ◽  
Ning Li
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxide ◽  
Thermal Reaction ◽  
Graphene Nanoplatelets ◽  
Matrix Composites ◽  
Sintering Process ◽  
2024 Aluminum Alloy ◽  
Alloy Matrix ◽  
The Matrix ◽  
Effective Role

In this study, graphene nanoplatelets (GNPs) decorated rare earth oxide CeO2 (CeO2@GNPs) were synthesized by alcohol thermal reaction method and used to reinforce GNPs/2024Al composites fabricated by a pressure sintering process. The results indicated that the decorating CeO2 particles could further promote the dispersion of the GNPs as well the binding of GNPs to the matrix. As a result, the as-prepared 0.5 wt.% CeO2@GNPs/2024Al composites exhibited yield strength and tensile strength increased by 21.1% and 24.7% compared to these of the matrix, respectively. It is better than the mechanical strength values of the composite enforced with the raw GNPs of the same quality. The optimization of GNPs dispersibility and interfacial bonding with Al matrix promotes its effective role in load-bearing strengthening.

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.

Rare-earth oxide coating for sub-micro particulates reinforced aluminum matrix composites

2003 ◽  
Vol 357 (1-2) ◽  
pp. 61-66 ◽  
Author(s):  
Zhiqiang Yu ◽  
Gaohui Wu ◽  
Dongli Sun ◽  
Jianfeng Chen ◽  
Longtao Jiang
Keyword(s):  
Rare Earth ◽  
Aluminum Matrix ◽  
Oxide Coating ◽  
Rare Earth Oxide ◽  
Aluminum Matrix Composites ◽  
Matrix Composites

scholarly journals Arc erosion resistance of hybrid copper matrix composites reinforced with CNTs and micro-TiB2 particles

2021 ◽  
Vol 11 ◽  
pp. 1469-1479 ◽  
Author(s):  
Xiuhua Guo ◽  
Yubo Yang ◽  
Kexing Song ◽  
Li Shaolin ◽  
Feng Jiang ◽  
...  
Keyword(s):  
Erosion Resistance ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
Arc Erosion ◽  
Tib2 Particles

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.

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