Tribological behavior of vanadium oxicarbide coatings

Grigorescu, I.C.; Ramirez, Javier; Salcedo, Federico Gutiérrez-Solana; Weil, C.

doi:10.1016/s0257-8972(97)00428-3

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…Vanadium carbide has fast oxidation kinetics that leads to the formation of vanadium oxide and oxycarbide surface layers. 18,19 So, the low intensity of the carbide signals is due to the surface oxidation of the samples, as confirmed by the high intensity of the oxide signals. Besides, the weak peak at 397.5 eV in the survey region corresponds to N1s, which is considered to be associated with the decomposition of diethanolamine.…”

Section: Xps Analysismentioning

confidence: 73%

Synthesis, characterization and growth mechanism of flower-like vanadium carbide hierarchical nanocrystals

Liang

Zhao

et al. 2010

CrystEngComm

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Novel flower-like vanadium carbide (V 8 C 7 ) hierarchical nanocrystals have been successfully synthesized in a large-scale hydrothermal process using a mixture of diethanolamine (HN(C 2 H 4 OH) 2 , DEA) and V 2 O 5 powder. The products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), selected-area electron diffraction (SAED) and energy-dispersive spectra (EDS). The results showed that flower-like products consist of very thin sheets with an average thickness of 10 nm and the nanosheets were a uniform single-crystalline V 8 C 7 phase. It was found that reaction temperature and type of capping molecules have a crucial influence on the morphology of the products. A possible growth mechanism of the flower-like V 8 C 7 hierarchical nanocrystals is proposed and discussed.

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Section: Xps Analysismentioning

confidence: 73%

Synthesis, characterization and growth mechanism of flower-like vanadium carbide hierarchical nanocrystals

Liang

Zhao

et al. 2010

CrystEngComm

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“…Vanadium carbide has fast oxidation kinetics, forming vanadium oxide (V 5 O 2 ) and oxycarbide surface layers, which suppress the plasticity-dominated wear mechanism, comparable to solid lubricants [19]. The wear rate of Sample 24 (2.7 x10 -6 mm 3 .Nm -1 ) was similar to that of WC-Co Grade S6 at 2.4 m 3.…”

Section: Ami Light Metals Conference 2014mentioning

confidence: 84%

Development of VC-Ni Eutectic Alloys for Wear Resistance

Apata

Fabuyide

Ogunmuyiwa³

et al. 2014

AMR

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Vanadium carbide is less dense, harder and tougher than tungsten carbide, and nickel is more corrosion resistant that cobalt. Replacing the binder with Ni should improve the corrosion resistance. Since there are eutectics with a wide range of compositions in the C-Ni-V system, this system has potential for wear resistant alloys with ~VC as the discrete hard phase and the nickel solid solution as the binder. The aim of this work was to ascertain if eutectic microstructures with vanadium carbides could be beneficial to wear resistance. Phase studies confirmed the wide range of the eutectic alloys, with VC + (Ni), VC + σ′, VC + (V) and graphite + (Ni) and different morphologies. Preliminary wear tests showed results comparable to WC-Co alloys.

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“…The EDX overall (analyses of large areas at low magnifications, to give an overall alloy composition) and phase analyses for the as-cast alloys are given in Table 1 (where * denotes a phase with non-stoichiometric compositions), and Table 2 shows the solidification reactions of the as-cast alloys. Figure 4,5,6,7,8,9,10,11,12,13,14,15,16 and 17 show the microstructures of selected alloys. Depending on the alloy compositions, the primary phases were graphite, * VC x (which transformed to * V 8 C 7 (Fig.…”

Section: As-cast Alloysmentioning

confidence: 99%

“…[2] It has fast oxidation kinetics, which results in the formation of vanadium oxide and oxycarbide surface layers that are characterized by low shear strength and friction coefficients, comparable to those of solid lubricants. [3][4][5] Its abrasion resistance is directly related to its high hardness, which is superior to all other similar compounds of transition metals in groups IV B and V B, except TiC. [6] Vanadium carbide is cheaper, less dense, harder and tougher than the conventional tungsten carbide, [7] and WC-VC-Co has higher hardness for comparable toughness than WC-Co of similar cobalt content.…”

Section: Introductionmentioning

confidence: 99%

Experimental Liquidus Surface Projection and Isothermal Section at 1000 °C of the V-Ni-C System

Fabuyide

Apata

Witcomb

et al. 2021

J. Phase Equilib. Diffus.

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Twenty-three V-Ni-C alloys were produced and analysed in the as-cast condition, as well as after annealing at 1000°C for 1000 h. The phases were identified using SEM-EDX and XRD. The extensions of the binary phases were determined. The liquidus surface projection was derived from the overall compositions, primary phases and the solidification sequences. Four invariant reactions on solidification were found. The isothermal section at 1000°C was also derived, which included the * Ni 2 V 4 C ternary phase.

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Tribological behavior of vanadium oxicarbide coatings

Cited by 5 publications

References 6 publications

Synthesis, characterization and growth mechanism of flower-like vanadium carbide hierarchical nanocrystals

Synthesis, characterization and growth mechanism of flower-like vanadium carbide hierarchical nanocrystals

Development of VC-Ni Eutectic Alloys for Wear Resistance

Experimental Liquidus Surface Projection and Isothermal Section at 1000 °C of the V-Ni-C System

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