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.

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.

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.

Investigation on Friction and Wear Property of Al2O3-Sio2(Sf) / AZ91D Composite

2011 ◽  
Vol 194-196 ◽  
pp. 351-354
Author(s):  
Guan Jun Liu ◽  
Xin Hua Mao ◽  
Feng Tian ◽  
Hui Rong Zhang
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Aluminum Phosphate ◽  
Aluminum Silicate ◽  
Wear Property ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
Hardened Alloy

AZ91D Magnesium alloy matrix composites (MMC) were fabricated by squeezing-infiltration casting with the preform made of crystallined aluminum silicate short fibers as reinforcement and aluminum phosphate as binder at high temperature. Drying sliding friction and wear resistance of the MMC were examined by means of MM200 wear tester ( block-on-ring configuration) against a hardened alloy steel counterface with 53HRC under loadings of 10 N,30 N and 50 N at 0.47 m/s and 0.92 m/s, and the wear morphology of the tested specimens was observed by scanning electronic microscope ( SEM ). The results indicate that wear mechanism of the MMC is characterized by abrasive wear with loadings 10 N and 30 N at 0.47m/s; while it is characterized by abrasive wear with slight flaking wear under loadings of 50 N at 0.47m/s, and it exhibits combined wear of abrasive wear with slight adhesive wear under loadings of 50 N at 0.94 m/s, increasing the wear resistance of the MMC.

Effect of Different Form of Carbon Addition on the Wear Behaviour of Copper Based Composites

2014 ◽  
Vol 89 ◽  
pp. 31-36
Author(s):  
Marcin Chmielewski ◽  
Katarzyna Pietrzak ◽  
Jan Dutkiewicz ◽  
Witold Piekoszewski ◽  
Remigiusz Michalczewski
Keyword(s):  
Friction And Wear ◽  
Electrical Contact ◽  
Functional Materials ◽  
Copper Matrix ◽  
Wear Behaviour ◽  
Powder Metallurgy Method ◽  
Matrix Composites ◽  
Contact Devices ◽  
Dry Conditions ◽  
Materials Used

Copper-carbon composites are very promising functional materials used as electrical contact devices due to their high electrical conductivity, thermal conductivity and excellent wear resistance. In the present study the influence of carbon forms (including carbon nanotubes, graphite nanopowder and graphene) on the properties of copper matrix composites was examined. The composites were fabricated using the powder metallurgy method. The optimal parameters of the hot-pressing process in vacuum were fixed as follows: the temperature of 525°C, the pressure of 600 MPa and the time of 10 min. The wear tests were performed in dry conditions using an SRV (Schwingungs Reibung und Verschleiss) friction and wear tester in a reciprocating motion. The friction and wear behaviour of copper with 3 vol.% of carbon were investigated. Scanning electron microscopy (SEM) was used to analyse the worn surfaces and debris, and finally the wear mechanism was discussed.

Influence of MoS2, H3BO3, and MWCNT Additives on the Dry and Lubricated Sliding Tribology of AMMC–Steel Contacts

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Harpreet Singh ◽  
ParamPreet Singh ◽  
Hiralal Bhowmick
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Preliminary Investigation ◽  
Multiwall Carbon Nanotubes ◽  
Operating Conditions ◽  
Matrix Composites ◽  
Base Oil ◽  
Oil Additives ◽  
Multiwall Carbon

The present study is focused on the performance evaluation of MoS2, H3BO3, and multiwall carbon nanotubes (MWCNT) used as the potential oil additives in base oil for aluminum metal matrix composites (AMMC)–steel (EN31) tribocontact. Al–B4C composite is used for this purpose; based on a set of preliminary investigation under unlubricated and fresh oil lubrication, three different types of AMMCs (Al–SiC, Al–B4C, and Al–SiC–B4C) were used. A pin-on-disk tribometer is used for all the friction and wear tests under operating condition of load 9.8 N and sliding velocity of 0.5 m/s. From the particle-based wet tribology, it is clear that both the additives H3BO3 and MWCNT improve the friction as well as wear behavior for selected composite contacts. Multiwall carbon nanotubes emerged out as superior among all the additives, whereas MoS2 additives show marginal enhancement in frictional performance under given operating conditions. Fractography and morphological study of pin specimens are carried out to identify the underlying friction and wear mechanisms.

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