Graphite fiber/copper composites prepared by spontaneous infiltration

Wang, Hongbao; Tao, Zechao; Li, Xiangfen; Yan, Xi; Guo, Quangui

doi:10.1016/j.apsusc.2018.01.035

Cited by 31 publications

(6 citation statements)

References 28 publications

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“…Carbon/metal composites, with high electrical conductivity and high mechanical strength under high temperature [1][2][3][4][5], are widely used in the field of aerospace, rail transit etc. [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Thermal shock resistance enhancement by improved interfacial bonding for carbon/aluminium composites

et al. 2022

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Carbon/aluminium (C/Al) composites have the advantages of low density and high electrical conductivity, which have potential applications in aerospace, rail transportation and other fields. However, the unstable bonding of the C/Al interface and significant thermal expansion differences have resulted in risks of the composites' failure once suffering from severe thermal shock. In this work, the C/Al composites were prepared by the pressure impregnation method, and silicon (Si) was added to overcome the problems of C/Al non‐wettability and thermal expansion differences. The effects of mass fractions of doped silicon on the mechanical properties, electrical conductivity and thermal shock resistance of C/Al composites were also examined. Results show that the formed SiC interlayer has effectively enhanced the interfacial bonding and reduced the differences in the thermal expansion coefficient of each component. As a result, the thermal shock resistance of the composites has been remarkably improved, and the flexural strength could remain 90% of the original level after the thermal shock test, compared with 50% of that without Si doping.

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Section: Introductionmentioning

confidence: 99%

Thermal shock resistance enhancement by improved interfacial bonding for carbon/aluminium composites

et al. 2022

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“…Copper-graphite (Cu/C) is a common seal material that is widely used to reduce friction, in oil bearings, electrical contacts and key mechanical parts because it has several properties including high thermal conductivity, corrosion resistance and self-lubrication (Song et al, 2004;Bullen, 2014;Xiao et al, 2013;Johnson et al, 2013; The current issue and full text archive of this journal is available on Emerald Insight at: https://www.emerald.com/insight/0036-8792.htm Futami et al, 2009;Findik, 2014). As a self-lubricating material, Cu/C has a low coefficient of friction (COF) when paired with bearing steel under dry friction because it can rapidly form a transfer film (Bien et al, 2014;Wang et al, 2018;Lu et al, 2021). Although several studies on Cu/C have been conducted to improve the wear resistance and reduce the COF (Jiang et al, 2016;Ma and Lu, 2011;Ma et al, 2008;Sarmadi et al, 2013;Rajkumar et al, 2011), the high wear rate of Cu/C and corrosion of bearing steel in an aqueous environment are still major problems.…”

Section: Introductionmentioning

confidence: 99%

Improved tribology performances of copper graphite (Cu/C) using a phosphorized oxidization surface obtained with tricresyl phosphate (TCP)

Liu³

et al. 2021

ILT

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Purpose Copper-graphite (Cu/C) is a type of seal material that has been widely used in liquid rocket engines and with normal metal pairs, has a high wear rate under liquid oxygen lubrication. In this study, bearing steel disks were subjected to a high-temperature oxidization and phosphating progress to create an oxidized tricresyl phosphating film (OTCP) film, using tricresyl phosphate (TCP) as the phosphating solvent. It is hoped that the surface wear rate and friction coefficient can be reduced by this method. Design/methodology/approach This study aim to form an anti-wear film on the surface of bearing steel, which can significantly improve the lubrication performance of Cu/C and bearing steel. The surfaces of bearing steel disks were dried to remove surface water and then put on a heating plate with a magnetic stirrer and a blue glazed oxide film obtained by heating the disks in the air at 200°C for 1 h. To create the OTCP film, bearing steel disks with a blue glazed oxide film were cleaned ultrasonically three times in ethanol and then placed in baths of TCP. After heating for 2 h at 120°C, excess TCP liquid was removed from the disks using ethanol, leaving an OTCP film on the disk surface. Findings It was found that steel coated with an OTCP film demonstrated better tribological performance (lower coefficient of fiction and wear rate) when pairing with Cu/C than either oxidized or untreated bearing steel. Additional chemical reactions occur when the oxide disk is immersed in TCP and the FePO4 film is formed after heating. Additionally, the OTCP film coated steel displayed good corrosion resistance, as confirmed by electrochemical corrosion tests. This finding demonstrates the potential for this process in the aerospace industry. Originality/value The preparation of OTCP films via high-temperature oxidization and phosphating of bearing steel was demonstrated, with the tribological properties of the OTCP film being investigated alongside those of the original surface and an oxidized film surface. The fabrication of OTCP films is easily scaled up and exhibits significant advantages as a new technology for applications in mechanical contact seal lubrication.

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“…Rapid development in machinery and electronic industries highly requires copper matrix composites with high strength and excellent thermal and elec-trical properties [1][2][3]. Recently, the considerable efforts have been devoted to the synthesis of copper matrix composites.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the considerable efforts have been devoted to the synthesis of copper matrix composites. Thereinto, the method by adding reinforcements was regarded as a feasible way to improve mechanical properties of copper matrix 49 composites [2]. As one of the most attractive fillers, various carbon materials like graphite, carbon nanotubes and carbon fibers have been employed to improve hardness and strength of copper matrix [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of spark plasma sintered titanium‐added copper/reduced graphene oxide composites

Zhang

Liu

et al. 2019

Materialwissenschaft Werkst

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Copper matrix composites were fabricated through mixing fixed amount of reduced graphene oxide and the different amounts of titanium. The dried copper/titanium/reduced graphene oxide mixture powders were firstly obtained by the wet‐mixing process, and then the spark plasma sintering process realized their faster densification. In the as‐sintered bulk composites, the layered reduced graphene oxide network, uniform titanium particles and copper‐titanium solid solution are observed in copper matrix. Investigations on mechanical properties show that the as‐prepared bulk composites exhibit the hardness and compressive yield strength compared with single reduced graphene oxide added composites. Increased titanium addition resulted into higher hardness and strength. The relevant formation and failure mechanisms of the composites and their influence on mechanical properties were discussed.

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Graphite fiber/copper composites prepared by spontaneous infiltration

Cited by 31 publications

References 28 publications

Thermal shock resistance enhancement by improved interfacial bonding for carbon/aluminium composites

Thermal shock resistance enhancement by improved interfacial bonding for carbon/aluminium composites

Improved tribology performances of copper graphite (Cu/C) using a phosphorized oxidization surface obtained with tricresyl phosphate (TCP)

Microstructure and mechanical properties of spark plasma sintered titanium‐added copper/reduced graphene oxide composites

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