Tribological Behavior of La2O3 Particulate Reinforced Copper Matrix Composites

2010 ◽  
Vol 150-151 ◽  
pp. 979-983
Author(s):  
Run Guo Zheng ◽  
Zai Ji Zhan ◽  
Bo Liang ◽  
Wen Kui Wang
Keyword(s):  
Wear Rate ◽  
Wear Mechanisms ◽  
Wear Behavior ◽  
Pure Copper ◽  
Copper Matrix ◽  
Powder Metallurgy Method ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
Sintered Copper ◽  
Pin On Disk

Copper matrix composites with different La2O3 content were fabricated by powder metallurgy method. Sliding wear behavior of the Cu-La2O3 composites was carried out by using a pin-on-disk wear tester under dry sliding conditions at a constant sliding speed of 20 m/s. The results showed that the wear rate of the composites was significantly lower than that of pure copper. The friction coefficient and wear rate of Cu matrix composites decreased significantly by incorporation of La2O3 particles. For determination of the wear mechanisms of the composites, the worn surfaces were examined using scanning electron microscopy. It is found that the main wear mechanisms of the sintered copper-La2O3 composites were oxidation wear and adhesive wear.

Friction and Wear Behavior of Nano-Al2O3 Particles Reinforced Copper Matrix Composites

2014 ◽  
Vol 137 (1) ◽  
Author(s):  
Guobin Li ◽  
Ningning Peng ◽  
Di Sun ◽  
Shude Sun
Keyword(s):  
Wear Resistance ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Pure Copper ◽  
Copper Matrix ◽  
Powder Metallurgy Method ◽  
Matrix Composites ◽  
Al2o3 Composite ◽  
Average Size

A series of copper–Al2O3 composite materials (CACMs) with 0, 2, 4, and 6 wt.% of Al2O3 (average size about 80 nm) was fabricated by powder metallurgy method. The tribological behavior of CACMs was investigated by a ring-on-block sliding friction test. The results show that the hardness and the wear resistance of CACMs are improved by the addition of Al2O3. The CACMs with 0% Al2O3 (pure copper) shows the mechanism of adhesive wear and have very poor wear resistance. By comparing with the pure copper, the wear resistance of the CACMs with 2% and 6% Al2O3 is improved. When the proportion of Al2O3 is 4%, slightly abrasive wear occurs at the interface between two sliding surfaces, and the CACMs achieve higher wear resistance in comparison to that with 2% and 6% Al2O3.

Dry Sliding Wear Behavior of Sintered Copper-Diamond Composite Fabricated by Powder Metallurgy

2010 ◽  
Vol 139-141 ◽  
pp. 335-339
Author(s):  
Run Guo Zheng ◽  
Zai Ji Zhan ◽  
Xiao Ting Peng ◽  
Wen Kui Wang
Keyword(s):  
Powder Metallurgy ◽  
Wear Mechanisms ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Pure Copper ◽  
Dry Sliding ◽  
Chemical Compositions ◽  
Powder Metallurgy Method ◽  
Diamond Particles ◽  
Sintered Copper

Copper matrix composites with 3wt% diamond particles were fabricated by powder metallurgy method. Sliding wear behavior of the copper-diamond composites was carried out by using a pin-on-disk wear tester under dry sliding conditions at a constant sliding speed of 100 m/s. The results showed that the wear rate of the composites was significantly lower than that of pure copper. The addition of diamond particles can markedly increase hardness and wear resistance of the copper-diamond composites. For determination of the wear mechanisms of the copper-diamond composites, a scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS) was employed to observe the microstructure and analyze the chemical compositions of the worn surface. It is found that the main wear mechanisms of the sintered copper-diamond composites were abrasive wear and adhesive wear.

Experimental Investigation on Thermal Conduction of Carbon Nanotubes Reinforced Copper Matrix Composites

2014 ◽  
Vol 564 ◽  
pp. 455-460
Author(s):  
Faiz Ahmad ◽  
Muhammad Aslam ◽  
M. Rafi Raza ◽  
Ali S. Muhsan ◽  
M.irfan Shirazi
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Sintered Density ◽  
Pure Copper ◽  
Copper Particle ◽  
Copper Matrix ◽  
Powder Metallurgy Method ◽  
Matrix Composites ◽  
Electron Microscopic ◽  
Scanning Electron

The performance of the micro-chip is affected by overheating and hence reduces the efficiency of electronic devices. The development of high thermal conductivity material can solve problems associated with dissipation of heat from the micro-chips. Thermal conductivity for carbon nanotubes (CNTs) are in the ranges of 1200-3000 W/moK which considered as the best candidate material for heat sink applications. This research investigates the fabrication of CNTs reinforced copper composites using powder metallurgy method. Copper powder and CNTs were ball milled to prepare mixtures and compacted at 600 MPa to fabricate test samples. The compacted test samples were sintered in argon atmosphere at 850oC. Sintered density of CNTs/Cu composites was measured and compared with theoretical density. Density data showed that 98% sintered density was achieved. Optical and scanning electron microscopic (SEM) examination of sintered compacts showed good grain growth, however porosity was also noted in sintered samples. Field emission scanning electron microscopy (FESEM) showed well dispersion of CNTs in copper matrix and interfacial bonding between copper particle and CNTs. In this experiment, the addition of 2 % vol. CNTs in copper matrix showed 9% increase in thermal conductivity approximately compared to thesintered pure copper.

Microstructure, wear and corrosion characteristics of Cu matrix reinforced SiC–graphite hybrid composites

2019 ◽  
Vol 53 (18) ◽  
pp. 2545-2553 ◽  
Author(s):  
Anbesh Jamwal ◽  
Prem Prakash ◽  
Devendra Kumar ◽  
Neera Singh ◽  
Kishor K Sadasivuni ◽  
...  
Keyword(s):  
Wear Rate ◽  
Intermediate Phase ◽  
Hybrid Composites ◽  
Pure Copper ◽  
Casting Process ◽  
Copper Matrix ◽  
Stir Casting ◽  
Matrix Composites ◽  
Corrosion Properties ◽  
Present Composite

The aim of the present study is to investigate the effect of SiC-graphite reinforcement on the properties of pure copper. Copper matrix composites with SiC-graphite reinforcement (0, 2.5,5, 7.5 and 10 wt.%) were prepared by stir casting process. Microstructure, phase, density, hardness and wear rate of prepared samples have been investigated. X-ray diffraction revealed that there is no intermediate phase formation between the reinforcement and matrix as a result of interfacial bonding between them. Microstructure study shows the uniform distribution of SiC-graphite particles in the Cu-matrix. Mechanical and corrosion properties of these Cu matrix MMCs were found to be dependent on the reinforcement content. Hardness was found to decrease with the addition of graphite due to its soft nature. Composite containing 5 wt.% reinforcement has shown minimum wear rate and maximum corrosion resistance. It is expected that the present composite will be useful for thermal management applications especially in heat exchangers.

scholarly journals Microstructural and sliding wear behavior of SiC-particle reinforced copper matrix composites fabricated by sintering and sinter-forging processes

2016 ◽  
Vol 5 (1) ◽  
pp. 5-12 ◽  
Author(s):  
Mohammadmehdi Shabani ◽  
Mohammad Hossein Paydar ◽  
Reza Zamiri ◽  
Maryam Goodarzi ◽  
Mohammad Mohsen Moshksar
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
Sinter Forging ◽  
Sic Particle
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