scholarly journals Experimental Researches on the Tribological Behavior of Composite Materials Sintered with Copper Matrix

2020 ◽  
Vol 916 ◽  
pp. 012015
Author(s):  
R Caliman
Keyword(s):  
Composite Materials ◽  
Tribological Behavior ◽  
Copper Matrix ◽  
Experimental Researches

Tribological Behavior of Composite Materials - A Review

2010 ◽  
Vol 1 (2) ◽  
pp. 123-128
Author(s):  
Mohammad A. Chowdhury ◽  
Dewan M. Nuruzzaman ◽  
Mohammad L. Rahaman
Keyword(s):  
Composite Materials ◽  
Tribological Behavior

Preparation of the Carbon Fiber/Cu Alloy Matrix Self-Lubricating Composite Materials

2014 ◽  
Vol 670-671 ◽  
pp. 164-167 ◽  
Author(s):  
Sui Yuan Chen ◽  
Xin Rong Li ◽  
Yu Ning Bi ◽  
Daniel Wellburn ◽  
Jing Liang ◽  
...  
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Mechanical Performance ◽  
Volume Fraction ◽  
Matrix Alloy ◽  
Copper Matrix ◽  
Wear Properties ◽  
Alloy Matrix ◽  
Coated Carbon

Using 663-tin bronze, Ni, W, nanoAl2O3, MoS2, graphite, CaF2, and Ni coated graphite as the matrix alloy powder, in which copper-coated carbon fiber of 5%, 7%, 9%, 11% and 13% in volume fraction were added as the reinforcing phase, a novel type carbon fiber/copper-matrix self-lubricating composite materials was prepared by means of powder metallurgy. The results indicate that the mechanical properties of the composite materials are improved after adding copper-coated carbon fibers. The composite materials reach optimal overall mechanical performance under testing when the volume fraction of the added copper-coated carbon fibers is 11%.: with a hardness of 57.8 HV and a compressive strength of 222 MPa. The addition of carbon fiber also improved the friction and wear properties of the composite materials. Increasing the volume fraction of fiber, was found to increase the wear resistance and improve self-lubricating performance. A volume fraction of 11% gave a friction coefficient of 0.09 and abrasion loss of 4mg.

scholarly journals Strengthening of the composite materials based on metal matrix and carbon nanotubes

2019 ◽  
Vol 64 (2) ◽  
pp. 166-174
Author(s):  
V. N. Pasovets ◽  
V. A. Kovtun
Keyword(s):  
Carbon Nanotubes ◽  
Compressive Strength ◽  
Composite Materials ◽  
Root Mean Square ◽  
Metal Matrix ◽  
Pore Space ◽  
Copper Matrix ◽  
Ultimate Compressive Strength ◽  
Mean Square ◽  
Nanosized Filler

Carbon nanotube (CNT)-reinforced powder nanocomposites based on copper matrix were successfully fabricated using a spark plasma sintering method. In this work, the mechanisms of hardening the metal matrix with nanosized filler particles were shown. A comparative analysis of the calculated and experimental values of the ultimate compressive strength for samples based on the copper matrix and carbon nanotubes was performed. Linear and root-mean-square models of hardening of composite materials with nano-sized filler were presented. The root-mean-square model allowed us to calculate reliably the values of the ultimate compressive strength at a concentration of CNT in the material up to 0.07 wt.%. The ultimate compressive strength decreases sharply when the content of CNTs in the material is more than 0.07 wt.%. The Orovan mechanism is the predominant mechanism of strengthening of composite materials: copper – CNT. The predominance of Orovan mechanism over other strengthening mechanisms is explained by the relatively low transfer efficiency of the load between the initial components of the material due to the weak interfacial connection between the matrix and the filler, the insufficiently uniform distribution of CNTs in the metal matrix, the agglomeration of nanosized filler, the location of a certain number of CNTs in the pore space of the metal matrix, the presence of pores of irregular shape. The results of the work were used in the development of new antifriction composite materials with improved strength properties for friction units of machines and mechanisms for various purposes.

scholarly journals Copper-Carbon Nanoforms Composites – Processing, Microstructure and Thermal Properties

2017 ◽  
Vol 62 (2) ◽  
pp. 1307-1310 ◽  
Author(s):  
K. Pietrzak ◽  
A. Gładki ◽  
K. Frydman ◽  
D. Wójcik-Grzybek ◽  
A. Strojny-Nędza ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Composite Materials ◽  
Raw Materials ◽  
Critical Concentration ◽  
Pure Copper ◽  
Copper Matrix ◽  
Carbon Phase ◽  
Composites Processing ◽  
Structure Investigations

AbstractThe main current of publication is focused around the issues and problems associated with the formation of composite materials with Cu matrix and reinforcing phases in the various carbon nanoforms. The core of the research has been focused on thermal conductivity of these composites types. This parameter globally reflects the state of the structure, quality of raw materials and the technology used during the formation of composite materials. Vanishingly low affinity of copper for carbon, multilayered forms of graphene, the existence of critical values of graphene volume in the composite are not conducive to the classic procedures of composites designing. As a result, the expected, significant increase in thermal conductivity of composites is not greater than for pure copper matrix. Present paper especially includes: (i) data of obtaining procedure of copper/graphene mixtures, (ii) data of sintering process, (iii) the results of structure investigations and of thermal properties. Structural analysis revealed the homogenous distribution of graphene in copper matrix, the thermal analysis indicate the existence of carbon phase critical concentration, where improvement of thermal diffusivity to pure copper can occur.

Tribological Behaviour of Copper-Graphene Composite Materials

2016 ◽  
Vol 674 ◽  
pp. 219-224 ◽  
Author(s):  
Marcin Chmielewski ◽  
Remigiusz Michalczewski ◽  
Witold Piekoszewski ◽  
Marek Kalbarczyk
Keyword(s):  
Composite Materials ◽  
Volume Fraction ◽  
Copper Matrix ◽  
Optical Microscope ◽  
Wear Behaviour ◽  
Pressing Pressure ◽  
Matrix Composites ◽  
Tribological Behaviour ◽  
Graphene Composite ◽  
Plasma Sintering

In the present study, the influence of the volume fraction of graphene on the tribological properties of copper matrix composites was examined. The composites were obtained by the spark plasma sintering technique in a vacuum. The designed sintering conditions (temperature 950°C, pressing pressure 50 MPa, time 15 min) allowed obtaining almost fully dense materials. The tribological behaviour of copper-graphene composite materials was analysed. The tests were conducted using a CSM Nano Tribometer employing ball-on-plate tribosystem. The friction and wear behaviour of copper-graphene composite materials were investigated. An optical microscope, interferometer, and scanning electron microscope were used to analyse the worn surfaces. In friction zone, the graphene acts as a solid lubricant, which results in the increase in the content in the composites positively influencing the tribological characteristics of the steel- Cu-graphene composite.

Use Copper Slag to Prepare Copper Matrix Composites

2011 ◽  
Vol 183-185 ◽  
pp. 1586-1590
Author(s):  
Wei Ping Liu
Keyword(s):  
Composite Materials ◽  
Matrix Composite ◽  
Copper Powder ◽  
Sintering Temperature ◽  
Copper Slag ◽  
Copper Matrix ◽  
Alumina Content ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
Copper Matrix Composite

Copper slag was used to prepare copper powder by way of slurry electrolysis, and the copper powder was used to fabricate copper matrix composite materials reinforced with chemical plating surface modified alumina particulates. Alumina particulates were pretreated in ultrasonic field by chemical copper plating in order to make alumina particulates covered with a layer of copper film and form Al2O3/Cu composite powders. Copper matrix composite materials strengthened with alumina particulates were synthesized by means of pressure molding and sintering. Microstructure of copper matrix composites was researched by means of SEM. SEM analysis shows that alumina particulates distribute in the copper-based body evenly, and combine with copper closely. The effects of sintering temperature, pressure and alumina content on the compactness and hardness of copper matrix composites were studied by orthogonal tests. The compactness of composites increases with the sintering temperature and pressure increasing, and decreases with the alumina content increasing. The hardness of composite materials increases with the sintering temperature, pressure and alumina particulates increasing.

Microstructure and Tribological Properties of the Copper Matrix Composite Materials Containing Lubricating Phase Particles

2014 ◽  
Vol 59 (1) ◽  
pp. 365-369 ◽  
Author(s):  
B. Juszczyk ◽  
J. Kulasa ◽  
W. Malec ◽  
Sz. Malara ◽  
M. Czepelak ◽  
...  
Keyword(s):  
Composite Materials ◽  
Powder Metallurgy ◽  
Tribological Properties ◽  
Glassy Carbon ◽  
Copper Alloys ◽  
Metallic Matrix ◽  
Copper Matrix ◽  
Stir Casting ◽  
Mechanical Stirring ◽  
Carbon Particles

Abstract The paper presents results of the studies into influence of individual particles of lubricating phase on microstructure and tribological properties of copper based composite materials for slide bearings. The studied material was composed of copper alloys with lubricating phase particles, e.g. in a form of graphite and glassy carbon. The metallic matrix of composite materials consisted of Cu-Sn type alloys. Production of the examined materials included processes with complete or partial participation of liquid phase and was conducted in two ways. In production of composites both classical powder metallurgy technology was applied and a method of melting with simultaneous mechanical stirring in liquid state (stir casting). Particles of lubricating phases were heated up to the temperature of 200°C and introduced into a liquid metal and then stirring process at constant rate of 1500 rpm rotational speed was applied. To improve wettability of graphite and glassy carbon particles titanium was introduced into the metallic matrix. In production of the composites by powder metallurgy methods the process consisted of mixing of bronze powders and particles of non-metallic phases and then their consolidation. Both quantitative and qualitative structure analysis of the produced composites was performed. Also through evaluation of tribological properties (friction coefficient, wear) with CSM Instruments high temperature tribometer THT was conducted.

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