Effect of Graphite Content on the Tribological Performance of Copper-Matrix Composites Under Different Friction Speeds

2017 ◽  
Vol 139 (4) ◽  
Author(s):  
Han Xiao-Ming ◽  
Gao Fei ◽  
Su Lin-Lin ◽  
Fu Rong ◽  
Zhang En
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
High Speed ◽  
Copper Matrix ◽  
Tribological Performance ◽  
Matrix Composites ◽  
Third Body ◽  
H13 Steel ◽  
Copper Matrix Composites ◽  
The Third

The effect of graphite (Gr) content on tribological performance of copper-matrix composites against H13 steel was investigated using a pin-on-disk test in the range of 3.14–47.1 m/s. The composites with different weight fractions of Gr (up to 18%) were fabricated by powder metallurgy technique. The results showed that the friction coefficient and wear rate generally decreased with the increase in Gr content. However, the friction coefficient and wear rate differ at various speeds. At 200 and 500 r/min, the friction coefficient and wear rate kept lower with the increase in Gr content, because the third body of Cu–Al–3%Gr specimen had strong fluidity and plasticity. By contrast, the particle third body of Cu–Al–12%Gr specimen, which contained higher content of Gr, could roll easily. Increased Gr feeding to the third body was reasonable for the decreasing of friction coefficient and wear with the increasing of the amount of Gr content at the speed in the range of 1000–2000 r/min. Under the high-speed, the friction coefficient showed slight change because the friction temperature induced all the third bodies to extend and flow effortlessly without componential influence. However, wear decreased significantly because the third body possessed more metal, which favored attachment to the counter disk.

scholarly journals Enhanced Frictional Properties of NiO-based Nanocomposites With the Addition of GDC

2021 ◽  
Author(s):  
Jooho Park ◽  
Minwoo Ahn ◽  
Seungwoo Han ◽  
Wonyoung Lee ◽  
YoungZe Lee
Keyword(s):  
Grain Size ◽  
Synergetic Effect ◽  
Wear Particle ◽  
Tribological Performance ◽  
Matrix Composites ◽  
Third Body ◽  
Variable Loading ◽  
Frictional Properties ◽  
The Third ◽  
Friction Induced Vibration

Abstract The tribological performance and friction-induced vibration of Gd0.2-Ce0.8O1.9 (GDC) reinforced nickel oxide (NiO) metal matrix composites prepared via sintering on the tribological performance, as well as friction induced vibration were investigated. Compared to pure NiO, the composites exhibit improved mechanical properties, such as a relatively high dislocation density, hardness and small grain size. The results show that GDC-reinforced NiO nanocomposites feature improved tribological performance and can suppress the occurrence of friction-induced vibration under variable loading conditions. Furthermore, the generated acceleration can be suppressed by wear particles generated during the friction process, acting as the third body at the contact interface. As a result, the addition of GDC reduces the grain size of the composite, increases hardness, and improves tribological properties through the synergetic effect of the solid lubricating action of NiO and the role of the third body of the wear particle.

Fabrication of graphene oxide-Ti3AlC2 synergistically reinforced copper matrix composites with enhanced tribological performance

2019 ◽  
Vol 45 (15) ◽  
pp. 18592-18598 ◽  
Author(s):  
Weiqi Lian ◽  
Yongjin Mai ◽  
Jie Wang ◽  
Liuyan Zhang ◽  
Cansen Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Copper Matrix ◽  
Tribological Performance ◽  
Matrix Composites ◽  
Copper Matrix Composites

scholarly journals Effect of Carbon Content on Friction and Wear Properties of Copper Matrix Composites at High Speed Current-Carrying

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2881
Author(s):  
Zhenghai Yang ◽  
Yuexin Ge ◽  
Xu Zhang ◽  
Bao Shangguan ◽  
Yongzhen Zhang ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
High Speed ◽  
Friction And Wear ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Wear Properties ◽  
Wear Area ◽  
Graphite Content ◽  
Arc Erosion ◽  
Graphite Composites

The copper matrix composites were prepared by spark plasma sintering (SPS). The current-carrying friction and wear tests were carried out on a self-made HST-100 high-speed current-carrying friction and wear tester, and the effect of the graphite content on the current-carrying friction and wear properties of the composite material was studied. The results show that with an increase in graphite content, the average friction coefficient and wear rate of the two materials decreased significantly, the fluctuation amplitude of the friction coefficient was also significantly reduced, and the average friction coefficient of copper-coated graphite composite with graphite content of 10 wt.% was 0.100; when the graphite content was the same and more than 5.0 wt.%, the average friction coefficient and wear rate of copper–graphite composites were slightly higher than copper–copper-coated graphite composites; the current-carrying efficiency and current-carrying stability of the copper matrix composite were obviously higher than that of copper material; there was a mechanical wear area and arc erosion area on the wear surface of the composites, with the increase in graphite content, the adherence and the tear of the mechanical wear area weakened, the rolling, plastic deformation increased, and the surface roughness decreased obviously. The surface roughness of the wear surface of copper–copper-coated graphite composites with graphite content of 10 wt.% was 3.17 μm. The forms of arc erosion included melting and splashing, and were mainly distributed in the friction exit area.

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.

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

Synthesis, characterization and forming behavior of hybrid copper matrix composites produced using powder metallurgy

2017 ◽  
Vol 108 (7) ◽  
pp. 586-591 ◽  
Author(s):  
Ilayaraja Karuppiah ◽  
Ranjith Kumar Poovaraj ◽  
Anandakrishnan Veeramani ◽  
Sathish Shanmugam ◽  
Ravichandran Manickam ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites
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