Effect of rare earth oxide addition on microstructures of ultra-fine WC–Co particulate reinforced Cu matrix composites prepared by direct laser sintering

2007 ◽  
Vol 445-446 ◽  
pp. 316-322 ◽  
Author(s):  
Dongdong Gu ◽  
Yifu Shen ◽  
Long Zhao ◽  
Jun Xiao ◽  
Peng Wu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxide ◽  
Laser Sintering ◽  
Matrix Composites ◽  
Oxide Addition ◽  
Direct Laser ◽  
Particulate Reinforced

scholarly journals Effects of rare earth oxide addition on NdFeB magnets.

1987 ◽  
Vol 11 (2) ◽  
pp. 235-238 ◽  
Author(s):  
K. Ohashi ◽  
T. Yokoyama ◽  
Y. Tawara
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxide ◽  
Ndfeb Magnets ◽  
Oxide Addition

The effect of rare-earth oxide addition on the hot-pressing of magnesium silicon nitride

2002 ◽  
Vol 22 (5) ◽  
pp. 777-783 ◽  
Author(s):  
Shukiko Tanaka ◽  
Kiyoshi Itatani ◽  
Hiroshi Uchida ◽  
Mamoru Aizawa ◽  
Ian J Davies ◽  
...  
Keyword(s):  
Rare Earth ◽  
Silicon Nitride ◽  
Hot Pressing ◽  
Rare Earth Oxide ◽  
Oxide Addition

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.

scholarly journals Effects of Rare Earth Oxide Addition on the Sintering of Mullite

1991 ◽  
Vol 99 (1149) ◽  
pp. 351-356 ◽  
Author(s):  
Takashi MITAMURA ◽  
Hidehiko KOBAYASHI ◽  
Noboru ISHIBASHI ◽  
Tokuji AKIBA
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxide ◽  
Oxide Addition

Oxidation Behavior and Mechanical Property of Si3N4 Ceramics with Rare Earth Oxide Addition

2007 ◽  
Vol 336-338 ◽  
pp. 2478-2480
Author(s):  
Xu Guang Tong ◽  
Jian Bao Li ◽  
Hong Lin ◽  
Xiao Zhan Yang ◽  
Jun Yang
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Oxidation Behavior ◽  
Rare Earth Oxide ◽  
Oxidation Products ◽  
Oxidation Test ◽  
Oxide Addition ◽  
Nitride Ceramics ◽  
Before And After ◽  
Si3n4 Ceramics

The effects of rare earth oxides (Lu2O3 and La2O3) on the property, microstructure and oxidation behavior of hot-pressing sintered Si3N4 ceramics were investigated. The silicon nitride ceramics with Lu2O3 and La2O3 as addition have been fabricated by hot-pressed at 1800°C for 1h under a pressure of 25MPa. Oxidation test was carried out at 1400°C in air for 100 hours. Mechanical properties, SEM and XRD were measured before and after oxidation. The results showed that Si3N4 ceramics doped Lu2O3 had good microstructure and mechanical properties than those doped La2O3. Oxidation test showed a parabolic weight gain with oxidation time at 1400°C in air and the oxidation products of the ceramics were SiO2, Re2Si2O7 and Re2SiO5 confirmed by XRD and EDS. The rate-controlling step was the diffusion of ion. The samples doped Lu2O3 showed superior oxidation resistance to those doped La2O3.

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