Influence of nano-Al2O3-reinforced oxide-dispersion-strengthened Cu on the mechanical and tribological properties of Cu-based composites

Zhao, Xiang; Guo, Leichen; Zhang, Long; Jia, Tingting; Chen, Cunguang; Shao, Huiping; Guo, Zhimeng; Luo, Ji; Sun, Junbin

doi:10.1007/s12613-016-1368-z

Cited by 12 publications

(4 citation statements)

References 20 publications

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“…Both of them are superior to SiO 2 in terms of hardness and thermal conductivity, which can potentially provide increased performance in increasing friction and dissipating heat. They have been reported to play important roles in reinforcing composites or improving tribological performances [9,15,[24][25][26][27][28][29]. However, there are some differences between them in terms of physical and frictional properties.…”

Section: Introductionmentioning

confidence: 99%

Role of titanium carbide and alumina on the friction increment for Cu-based metallic brake pads under different initial braking speeds

et al. 2020

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To understand the effect of abrasives on increasing friction in Cu-based metallic pads under different braking speeds, pad materials with two typical abrasives, titanium carbide (TiC) and alumina (Al2O3), were produced and tested using a scale dynamometer under various initial braking speeds (IBS). The results showed that at IBS lower than 250 km/h, both TiC and Al2O3 particles acted as hard points and exhibited similar friction-increasing behavior, where the increase in friction was not only enhanced as IBS increased, but also enhanced by increasing the volume fraction of the abrasives. However, at higher IBS, the friction increase was limited by the bonding behavior between the matrix and abrasives. Under these conditions, the composite containing TiC showed a better friction-increasing effect and wear resistance than the composite containing Al2O3 because of its superior particle-matrix bonding and coefficient of thermal expansion (CTE) compatibility. Because of the poor interface bonding between the matrix and Al2O3, a transition phenomenon exists in the Al2O3-reinforced composite, in which the friction-increasing effect diminished when IBS exceeded a certain value.

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Section: Introductionmentioning

confidence: 99%

Role of titanium carbide and alumina on the friction increment for Cu-based metallic brake pads under different initial braking speeds

et al. 2020

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“…The elements Zr and Cr can be added to Cu-Ti-B systems to refine the ceramic particles and to promote the interfacial bonding between TiB 2 ceramic particles and the Cu matrix [ 42 , 43 , 44 , 45 ]. However, the synthesis of cermets by the CS method is hindered by the difficulty of pressurization and densification [ 46 , 47 , 48 , 49 ]. At present, there are few reports of the synthesis of in situ TiB 2 /Cu cermets by CS, combined with hot press consolidation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cr and Zr Addition on Microstructures, Compressive Properties, and Abrasive Wear Behaviors of In Situ TiB2/Cu Cermets

et al. 2018

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In situ micro-TiB2/Cu cermets with a different TiB2 content (40, 50, and 60 vol %) were successfully fabricated by combustion synthesis (CS) and hot press consolidation in Cu-Ti-B systems. In addition, different contents of Cr and Zr were added to the Cu-Ti-B systems. The microstructure, mechanical properties, and abrasive wear properties of the TiB2/Cu cermets were investigated. As the ceramic content increased, the yield strength and compressive strength of the cermets were found to increase, while the strain decreased. An increase in load and abrasive particle size caused the wear volume loss of the TiB2/Cu cermets to increase. When the ceramic content was 60 vol %, the wear resistance of the TiB2/Cu cermets was 3.3 times higher than that of pure copper. The addition of the alloying elements Zr and Cr had a significant effect on the mechanical properties of the cermets. When the Cr content was 5 wt %, the yield strength, ultimate compressive strength, and microhardness of the cermets reached a maximum of 997 MPa, 1183 MPa, and 491 Hv, respectively. Correspondingly, when the Zr content was 5 wt %, those three values reached 1764 MPa, 1967 MPa, and 655 Hv, respectively, which are 871 MPa, 919 MPa, and 223 Hv higher than those of the unalloyed cermets. The wear mechanism of the in-situ TiB2/Cu cermets, and the mechanisms by which the strength and wear resistance were enhanced by the addition of Zr, were preliminarily revealed.

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“…However, due to the high difference of the elastic modulus between SiO 2 or Al 2 O 3 and the matrix, the bonding strength of the matrix is low, and makes the friction components (SiO 2 or Al 2 O 3 ) fall off easily. Therefore, the friction coefficients of these friction materials are reduced greatly under high-speed friction conditions [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cr–Fe on friction and wear properties of Cu-based friction material

Fan

Zhang

et al. 2018

Materials Science and Technology

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The copper-based friction material with Cr–Fe particles was prepared using the hot pressing powder metallurgy sintering process. Effects of Cr–Fe particles content on the microstructure formation and the friction/wear property of copper-based friction material were investigated. The addition of Cr–Fe powder could effectively modify the bonding status between the hard phase and the matrix. The bonding strength between the hard phase and the matrix increased with increasing content of Cr–Fe powders in the range of 0–11 wt-%. With increasing content of Cr–Fe powders, the hardness of the copper-based friction material increased gradually. When the content of Cr–Fe was 11 wt-%, the copper-based friction material had the best combination of coefficient of friction, hardness and wear capacity.

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Influence of nano-Al2O3-reinforced oxide-dispersion-strengthened Cu on the mechanical and tribological properties of Cu-based composites

Cited by 12 publications

References 20 publications

Role of titanium carbide and alumina on the friction increment for Cu-based metallic brake pads under different initial braking speeds

Role of titanium carbide and alumina on the friction increment for Cu-based metallic brake pads under different initial braking speeds

Effects of Cr and Zr Addition on Microstructures, Compressive Properties, and Abrasive Wear Behaviors of In Situ TiB2/Cu Cermets

Effect of Cr–Fe on friction and wear properties of Cu-based friction material

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