High-temperature tribological behavior of CoCrFeNiV high-entropy alloys: A parallel comparison with CoCrFeNiMn high-entropy alloys

Zhang, Min; Zhang, Xinghua; Niu, Muye; Jiang, Zisi; Chen, Hao; Sun, Yuhang

doi:10.1016/j.triboint.2022.107736

Cited by 48 publications

(6 citation statements)

References 41 publications

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“…According to Figure 3c,c′, the black pits on the friction surface indicate that spalling wear occurs at the friction interface and is accompanied by minor oxidative wear, except for the typical abrasive wear morphology. Caused by the increase in speed, the surface temperature rises earlier, the friction surface undergoes an oxidation reaction and iron oxide is generated, resulting in the surface black marks 34–36 . In addition, the surface material of the lower specimen is scoured by high‐speed viscous fluid to produce fatigue stress.…”

Section: Resultsmentioning

confidence: 99%

Tribological properties of a novel iron‐based self‐lubricating composite

Zhu,

Ahn,

Zheng

et al. 2024

Lubrication Science

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In this work, the tribological properties of a novel iron‐based self‐lubricating composite as the tribopairs of a plunger pump were systematically studied on an end‐face tribometer, and the tribological mechanism was also revealed. The results show that the wear mechanism of the composite can be ascribed to adhesive wear when the sliding speed is lower than 1.5 m/s. As the sliding speed increases from 1.5 to 2.0 m/s, the wear type transforms to oxidative wear due to the increase of tribo‐oxidation. In addition, the failure criteria of the tribopair composite materials are summarised. When the average coefficient of friction is greater than 0.04, or the wear rate is greater than 9.66 μm3/(N m), the tribopair fails. This offers a valuable reference for industrial application of the tribopairs made from the iron‐based self‐lubricating composite.

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Section: Resultsmentioning

confidence: 99%

Tribological properties of a novel iron‐based self‐lubricating composite

Zhu,

Ahn,

Zheng

et al. 2024

Lubrication Science

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“…The Ni 2p spectrum could be decomposed into three main peaks at 857.2 eV, 861.4 eV, and 873.8 eV, all of which are NiO [38][39][40]. The fine spectrum of Cr 2p shows that the oxide is mainly Cr2O3, with peaks at 576.2 eV and 586 eV, and a small amount of CrO3, with a peak at 579.8 eV [39,41,42]. The fine spectrum of Fe 2p has three main fitted peaks at 710.7 eV, 713.3 eV, and 725.2 eV, respectively, with the corresponding oxides being Fe2O3 [40,[43][44][45].…”

Section: Structure and Composition Of The Graphite Friction-transferr...mentioning

confidence: 98%

Study on the Tribological Behavior and the Interaction between Friction and Oxidation of Graphite Reinforced by Impregnated Phosphate at High Temperatures

et al. 2023

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The stability of the graphite seal device is a key factor for the normal operation of aero engines. However, conventional graphite exhibits poor comprehensive performance due to its porous structure, which limits its application at high temperatures. Therefore, in this paper, phosphate was used to impregnated graphite pores, and the interaction between the friction, wear, and oxidation of phosphate-impregnated graphite against superalloy at high temperatures was studied through pin-on-disk friction tests. The results revealed that the coefficient of friction (COF) of matrix graphite fluctuated greatly, from 0.07 to 0.17, in the range of 100 °C to 500 °C, while the COF of impregnated graphite was stable, at around 0.13, from 100 °C to 500 °C. The wear rates of the two types of graphite were close from 20 °C to 300 °C, while the wear rate of the impregnated graphite was significantly lower than that of the matrix graphite at higher temperatures, from 400 °C and 500 °C. The reason was that the impregnated phosphate reacted with graphite at a high temperature, forming the inert site which helped to inhibit the oxidation and maintain the mechanical properties of the impregnated graphite at high temperatures. In addition, the impregnated graphite could maintain better integrity of the contact surface and reduce the inclusion of large hard metal oxides, thus effectively reducing the abrasive wear of the disk. Therefore, the wear depth of the superalloy disk samples with impregnated graphite was significantly lower than that of the matrix graphite. The results promote the application of phosphate-impregnated graphite under the high temperature conditions of aero engines.

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“…5.7 eV and the standard spectrum can be judged here as the spectral peak [38] of Ti's oxide, so the oxide TiO 2 is also formed on the wear surface of the coating. From the above analysis, it can be seen that the high entropy alloy coating in dry sliding friction abrasion after the formation of a mixed oxide layer of Fe 2 O 3 , MoO 3 , CuO, and TiO 2 has been shown that the oxides formed on the wear surface can act as [ [39][40][41][42], which is called oxidized oxide, and it is also called rusty oxide. It has been shown that these oxides formed on the wear surface can act as a lubricant, called oxide 'glaze layer', which can effectively isolate contact between the friction sub-interfaces and reduce the coefficient of friction, and at the same time, separate the contact surfaces, hindering the transfer of substances between the friction sub-materials, which reduces the adhesive wear.…”

Section: Analysis Of Friction and Wear Mechanismmentioning

confidence: 99%

Wear performance of FeCuMoTiV high entropy alloy coatings by laser cladding

Li,

He,

Wang

et al. 2024

Surf. Topogr.: Metrol. Prop.

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FeCuMoTiV high-entropy alloy coatings were prepared on the surface of aluminum matrix composites using the laser cladding technique. The physical phase composition of the coating, the hardness of each physical phase, and the friction and wear behavior of the coating were studied in detail. The results show that: From the XRD and TEM analysis, the coating’s physical phases, BCC1(MoV) and BCC2(TiFe), are coherent. From the EBSD analysis, the grains of the coating have no obvious selective orientation, and the average equivalent circle diameter is 26.44 μm. Nanomechanical tests showed that the average hardness of the BCC1 phase in the coating was 7831.2 N mm−2, which provided the coating with excellent abrasion resistance. The average coefficient of friction of the coating showed a tendency to decrease and then increase with the increase of time, and it floated in the range of 0.3 ± 0.05. The coating forms a structure containing Fe2O3, MoO3, CuO, and TiO2 mixed oxide ‘glaze layer’ on the wear surface, which provides good lubrication. Combined with SEM analysis, the wear mechanism of the coating is a mixture of abrasive wear, oxidative wear, adhesive wear, and fatigue wear.

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High-temperature tribological behavior of CoCrFeNiV high-entropy alloys: A parallel comparison with CoCrFeNiMn high-entropy alloys

Cited by 48 publications

References 41 publications

Tribological properties of a novel iron‐based self‐lubricating composite

Tribological properties of a novel iron‐based self‐lubricating composite

Study on the Tribological Behavior and the Interaction between Friction and Oxidation of Graphite Reinforced by Impregnated Phosphate at High Temperatures

Wear performance of FeCuMoTiV high entropy alloy coatings by laser cladding

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