Study on the Friction and Wear Behaviors of Cu/PTFE Self-Lubricating Composites

Xie, Ting; Zhen, Xu; Yan, Zhao; Chen, Gang; Jiao, Ming Hua; Yu, Jian Wei; Ye, Yin

doi:10.4028/www.scientific.net/amm.130-134.1466

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…Rae 4 , 5 carried out the tensile experiment and compression experiment of polytetrafluoroethylene samples at different strain rates and temperatures, and used the Hopkinson bar to carry out the compression test of the samples at different strain rates and temperatures. In addition to the mechanical properties test, some scholars have also studied the influence factors of PTFE fracture behavior 6 , preparation process 7 and filler shape 8 on the properties. In addition, PTFE-based reactive materials formed by mixing active metal powders in fluoropolymer binders are also a research hotspot, including energy release characteristics 9 , 10 , microstructure and mechanical properties 11 and other aspects of these materials.…”

Section: Introductionmentioning

confidence: 99%

Study on the forming characteristics of polytetrafluoroethylene/copper jet with different preparation processes

Yi,

Hao,

Tang

et al. 2023

Sci Rep

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In this paper, PTFE/Cu composite material for liner is taken as the research object, and the preparation process and jet forming characteristics of PTFE/Cu composite liner are studied. The liners were prepared by extrusion molding, molded sintering and hot-pressing sintering. Due to different preparation processes, different microstructures of the liner can occur, including defects such as pores and microcracks, resulting in different strength and density of the liner, leading to differences in the forming characteristics of the jet. Therefore, the forming process of the jet was simulated by the finite element numerical simulation software. It was found that there was obvious radial expansion effect in the head of the jet, but with the increase of density, the radial expansion effect was weakened, and the jet velocity decreased gradually. The strength and densification of the shaped charge liner prepared by different processes were different. The densification of the molded sintering liner was generally better than that of the other two kinds of shaped charge liners. As a result, the velocity of the jet formed by the molded sintering liner is always the highest, with a numerical simulation velocity of 6642 m/s and an experimental velocity of 6534.7 m/s. The second is the jet of the hot-pressing sintering liner and the lowest velocity is the jet of the extrusion molding cover, with a numerical simulation velocity of 6482 m/s, while the experimental velocity is only 6397.9 m/s. The jet velocity measured by the pulse X-ray experiment was compared with the velocity of the numerical simulation, and the error was within 2.96%, which verifies the accuracy of the numerical simulation.

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Section: Introductionmentioning

confidence: 99%

Study on the forming characteristics of polytetrafluoroethylene/copper jet with different preparation processes

Yi,

Hao,

Tang

et al. 2023

Sci Rep

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“…With the reactive materials becoming more and more popular, many scholars have carried out a series of studies on the active materials of PTFE matrix, including its formulation [4,5], mechanical properties [6], chemical reaction energy release [7], and damage mechanism [8]. The research on PTFE/Cu composites is also gradually developing, including the influence of the shape, content, and size of copper powder on the tribological properties of composites [9], crack propagation mechanism [10], and so on.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of PTFE/Cu Composite Material Preparation Process on Penetration Performance

Yi,

Hao,

Tang

et al. 2023

Polymers

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The jet formed by the traditional metal liner has a slender shape. The diameter of the jet head is consistent with that of the tail, and the ductility is good. When it is used to penetrate the target, it has a good damage effect. The low-density jet formed by the PTFE/Cu liner, according to the different preparation processes and densities, has different degrees of radial expansion. This phenomenon may lead to the expansion of the jet head during the penetration process, resulting in a damage effect, which is different from the previous jet on the target. In this paper, the numerical simulation of PTFE/Cu liners with different preparation processes penetrating steel targets is carried out, and the effects of different preparation processes and liner density on the penetration characteristics of jets penetrating steel targets are compared and analyzed. The PTFE/Cu shaped charge liner was processed according to different preparation processes, and the jet penetration steel target experiment was carried out, so as to verify and analyze the numerical simulation results.

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“…The improvement in the wear resistance of films by nano-Cu particles was analyzed. Xie [ 19 ] studied the effects of the morphology and mass of Cu powder on the friction coefficient and wear properties of PTFE composites. Regarding the particle dispersion and interface bonding of composite materials, Wang [ 20 ] studied the successful preparation of aluminum matrix composites with high boron nitride nanosheets (BNNSs) content by variable speed ball milling, the gradual addition of BNNSs and finally direct current sintering (DCS).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Damage Characteristics of Copper-Reinforced Polytetrafluoroethylene Shaped-Charge Warhead Liner

Wang

Yin

2022

Polymers

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Polymer materials have important applications in the4 terminal effect and damage by shaped-charge warheads. However, the low strength of pure PTFE materials reduces the penetrability of the expansive jet from these warheads, hindering its application. This study improves the strength of pure PTFE material by adding Cu powder to the shaped-charge liner. Three types of PTFE/Cu composites with different densities are prepared. The effect of increasing the density on the performance of an expansive jet is studied by a dynamic mechanical property experiment, microscopic analysis, numerical simulation, and a penetration experiment. The results show that the toughness and impact strength of the PTFE/Cu composites improve when 18–50.5% Cu is added. The strength of the composite increases linearly with the increase in Cu content. Numerical simulations and X-ray pulse experiments reveal that the addition of Cu powder enhances the cohesiveness of the head of the expansive jet. The jet head becomes more cohesive as the Cu content is increased. However, the length and diameter of the jet become smaller. The jet can create a deeper hole in the steel target and increase damage as more Cu is added to the liner.

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Study on the Friction and Wear Behaviors of Cu/PTFE Self-Lubricating Composites

Cited by 8 publications

References 5 publications

Study on the forming characteristics of polytetrafluoroethylene/copper jet with different preparation processes

Study on the forming characteristics of polytetrafluoroethylene/copper jet with different preparation processes

Study on the Effect of PTFE/Cu Composite Material Preparation Process on Penetration Performance

Experimental Study on Damage Characteristics of Copper-Reinforced Polytetrafluoroethylene Shaped-Charge Warhead Liner

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