Effect of h‐BN addition on friction and wear properties of C/C‐SiC composites fabricated by LSI

Niu, Zibo; Chen, Fu; Li, Zhuan; Pang, Lang; Yang, Li

doi:10.1111/ijac.13838

Cited by 9 publications

(4 citation statements)

References 25 publications

(50 reference statements)

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“…For hightemperature applications, C/C-h-BN-SiC composites that were moulded, carbonised, and infiltrated with liquid silicon shown outstanding self-lubrication, self-healing, and oxidation resistance. At very high braking speeds, adding h-BN to C/C-h-BN-SiC improves friction and wear without clamping stagnation [60]. Titanium alloys were coated with a 15 m thick h-BN coating for high temperature tribological applications, and they were then rapidly thermally annealed in a furnace using infrared radiation.…”

Section: Hexagonal Boron Nitride (H-bn)mentioning

confidence: 99%

“…At room temperature, Ni-P-35 vol.% h-BN autocatalytic composite coating exhibits a 106 mm 3 /(Nm) wear rate and a 0.2 friction coefficient when applied to an AISI52100 steel ball [53]. From room temperature to 600°C, nickel-based composites are self-lubricated by silver and h-BN nanopowders [60]. On non-metallic substrates, we also evaluated the mechanical durability and tribological behaviour of h-BN films deposited using an ion beam.…”

Section: Hexagonal Boron Nitride (H-bn)mentioning

confidence: 99%

See 1 more Smart Citation

Thermal Characteristics and Tribological Performances of Solid Lubricants: A Mini Review

Mittal¹,

Singh²,

Sharma³

2023

Advances in Rheology of Materials

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Solid lubricants separate two moving surfaces and reduce wear. Materials’ ability to act as solid lubricants depends on their characteristics relative to contact surfaces. Chemically stable fluorides (BaF2, CaF2), boron nitride (h-BN), transition metallic sulphides (MoS2, WS2), soft metals (Au, Ag), binary and multi-component oxides, such as silver-containing sulphates, chromates, and oxides, and MXenes are effective solid lubricants. Solid lubrication depends on the material’s structure. Structure, mechanical properties, chemical reactivity, and kind of substance characterise these materials (refractories, ceramics, glass, etc.). High temperatures (>300°C) are obtained at asperities due to frictional heat produced when two surfaces rub. High temperatures can breakdown lubricants, but the resulting compounds must be lubricants; otherwise, corrosive vapours or abrasive solids can occur. High thermal conductivity helps lubricants remove heat generated by rubbing. Lubricants must not be melted, as the solid will lose strength and distort or be removed like liquid. Tensile strength, compressibility, and hardness are significant mechanical qualities for solid lubricants in extreme conditions. This chapter discusses solid lubricants and their structure. Also discussed are solid lubricants’ mechanical and thermal properties. The lubricating mechanism and conclusion are also conferred.

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Section: Hexagonal Boron Nitride (H-bn)mentioning

confidence: 99%

Section: Hexagonal Boron Nitride (H-bn)mentioning

confidence: 99%

Thermal Characteristics and Tribological Performances of Solid Lubricants: A Mini Review

Mittal¹,

Singh²,

Sharma³

2023

Advances in Rheology of Materials

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show abstract

“…Hexagonal boron nitride (h-BN) exhibits a good combination of the properties of high chemical stability, high mechanical strength, high thermal conductivity and low density of surface dangling bonds. The h-BN has a lamellar crystal structure and is served as solid lubricant with low coefficient of friction (CoF), even superlubricity [16][17][18][19][20][21]. The h-BN as Coatings 2022, 12, 1772 2 of 16 solid lubricant is used in two ways.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Low Friction Behavior of h-BN Coatings against ZrO2

Zeng

2022

Coatings

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This paper presents high temperature low friction behaviors of the h-BN coatings, which were deposited on high-speed tool steel by radio frequency magnetron sputtering. A tribometer was used to investigate high temperature tribological properties of h-BN coatings against ZrO2 from 500 °C to 800 °C. The surface morphology, mechanical properties and chemical states of the worn surface of the friction pair were characterized and investigated systemically. The experimental results show that h-BN coatings are of significant importance to improve high temperature tribological properties of steel. Moreover, it is found that high temperature super low friction of the friction pairs is successfully achieved due to tribochemistry, which plays a key role in forming the in-situ generated Fe2O3/h-BN composites on the worn surface of h-BN coatings. CoFs of the friction pair are as super low as about 0.02 at 800 °C and around 0.03 at 600 °C at the stable stage. The high temperature super low friction mechanism of the friction pair is discussed in detail. The present study opens a new strategy to achieve high temperature super low friction of the friction system during sliding.

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“…h-BN has a structure similar to that of graphite and is a typical two-dimensional layered material with excellent thermal stability, good thermal conductivity, high oxidation resistance, high temperature resistance, and good mechanical strength [19,20]. As a lubricating additive, h-BN has weaker interlayer van der Waals forces than the covalent bonding between nitrogen and boron in the layer, which makes it easy to shear when subjected to load and can fill the wear surface better [21,22].…”

Section: Introductionmentioning

confidence: 99%

Implanting MnO2 into Hexagonal Boron Nitride as Nanoadditives for Enhancing Tribological Performance

Chen

Zhang

et al. 2022

Crystals

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Hexagonal boron nitride nanosheets (h-BNNs) show great potential in the field of tribology due to their typical two-dimensional layered structure and are essential for replacing conventional sulfur/phosphate-containing additives. However, the large particle size and poor dispersion of h-BNs seriously restrict their green lubrication application. In this paper, MnO2@h-BNNs nanocomposites were successfully prepared by ultrasonically exfoliating a hydrothermal method. The tribological properties of MnO2@h-BNNs nanocomposites as lubricant additives in poly- alpha-olefin oil (PAO) were investigated. The results show the oil dispersed with 0.25 wt% MnO2@h-BNNs had the best friction reduction and antiwear effect with 42% and 11.2% reduction, respectively, compared with the plain oil. Through further wear surface analyzing, we verified the antiwear mechanism of additives in filling the micropits and grooves on the wear surface and forming a friction protection film including Fe2O3, MnO2, and BN on the wear surface, avoiding direct contact between the friction subsets. This can provide ideas for other lubricating oil additives.

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Effect of h‐BN addition on friction and wear properties of C/C‐SiC composites fabricated by LSI

Cited by 9 publications

References 25 publications

Thermal Characteristics and Tribological Performances of Solid Lubricants: A Mini Review

Thermal Characteristics and Tribological Performances of Solid Lubricants: A Mini Review

High Temperature Low Friction Behavior of h-BN Coatings against ZrO2

Implanting MnO2 into Hexagonal Boron Nitride as Nanoadditives for Enhancing Tribological Performance

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