Synthesis and tribological properties of Mo‐doped WSe<sub>2</sub> Nanolamellars

Li, Wenjing; Hu, Ling; Wang, Minzhi; Tang, Hua; Li, Changsheng; Liang, Jiaqing; Jin, Yongxing; Li, Dongsheng

doi:10.1002/crat.201200131

Cited by 19 publications

(15 citation statements)

References 21 publications

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“…Over the past decades, a number of experimental and theoretical studies have been dedicated to modify LTMDs' properties through the doping method mainly due to the attractive results brought by the dopants. Wenjing Li et al 18 found that the friction coefficient of the base oil containing Mo-doped WSe 2 nanolamellars was lower and more stable than that of pure WSe 2 nanolamellars partly because the Mo-WSe 2 nanoakes with thinner and smaller morphologies could form a more stable tribolm on the rubbing surface. Similarly, Xiaopeng Qin et al 19 have nished a research on the microstructure, mechanical and tribological of Ti-doped MoS 2 composite coatings, which manifests the hardness and adhesion of the composite coatings reached its maximum within a certain range of Ti content and doped Ti improved the tribological properties of pure MoS 2 as well.…”

Section: Introductionmentioning

confidence: 99%

First-principles calculations on structural, electronic properties of V-doped 2H-NbSe2

Chen

Tang

et al. 2014

RSC Adv.

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Doping strategy has been applied in lots of areas holding promising performance for many functions. Here, we systemically report the main trends in structural, electronic properties and chemical bonding for V doped into 2H-NbSe 2 in two types of doping by means of the first-principles PBE-GGA calculations. To investigate the stability of the doped system with changing concentration of V atoms, 2 Â 2 Â 1, 3 Â 3 Â 1 and 4 Â 4 Â 1 2H-NbSe 2 supercells have been taken into consideration. Results show that it is easier to be doped as the concentration of dopant V is lower and the substituted doping structure is more stable than that of the dopant embedded into the interlayer. In addition, it is found that the dopant V atom forms a covalent bond with the surrounding Se atoms in both of the two doping structures, which can explain the variations of the structural parameters after V atom is doped into 2H-NbSe 2 . Moreover, what leads to the variation of the electronic structures is that the asymmetric structure and the more energetic Se atoms firstly near the dopant V atom after V is doped into 2H-NbSe 2 in both of the two doping types. Our calculation results can provide good theoretical knowledge for the subsequent experiments.

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Section: Introductionmentioning

confidence: 99%

First-principles calculations on structural, electronic properties of V-doped 2H-NbSe2

Chen

Tang

et al. 2014

RSC Adv.

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“…Firstly, NbSe 2 were successfully synthesized by a facile thermal solid-state reaction [14]; then, the as-prepared NbSe 2 was coated with Ni layers by electroless plating [15]. Details of the electroless plating are as follows: NbSe 2 powder was firstly coarsened by ultrasonic treatment in a concentrated H 2 SO 4 solution for 20 min.…”

Section: Methodsmentioning

confidence: 99%

Fabrication and Tribological Properties of Copper Matrix Solid Self-Lubricant Composites Reinforced with Ni/NbSe2 Composites

Zhang

Chu

2019

Materials

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This paper presents a facile and effective method for preparing Ni/NbSe2 composites in order to improve the wettability of NbSe2 and copper matrix, which is helpful in enhancing the friction-reducing and anti-wear properties of copper-based composites. The powder metallurgy (P/M) technique was used to fabricate copper-based composites with different weight fractions of Ni/NbSe2, and tribological properties of composites were evaluated by using a ball-on-disk friction-and-wear tester. Results indicated that tribological properties of copper-based composites were improved by the addition of Ni/NbSe2. In particular, copper-based composites containing 15 wt.% Ni/NbSe2 showed the lowest friction coefficient (0.16) and wear rate (4.1 × 10−5 mm3·N−1·m−1) among all composites.

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“…The Ti-doped NbSe 2 nanoplatelets were successfully fabricated by ball milling micro-sized Nb, Ti and Se powders at a molar ratio of 0.91:0.09:2.2 for 10 h first (Li et al , 2012; Zhang et al , 2014). Then, the mixed powders were put into the quartz tubes, exhaust air then seal.…”

Section: Methodsmentioning

confidence: 99%

Tribological and electrical behavior of Cu-based composites with addition of Ti-doped NbSe₂nanoplatelets

Shi²,

Zhu³

et al. 2018

ILT

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Purpose This paper aims to clarify the size and morphology of transition metal dichalcogenides has an impact on lubrication performance of Cu-based composites. This study is intended to show that Cu-based electrical contact materials containing Nb0.91Ti0.09Se2 have better electrical and tribological properties than those containing NbSe2. The tribological properties of Cu-based with different Ti-dopped NbSe2 content were also discussed. Design/methodology/approach The NbSe2 and Nb0.91Ti0.09Se2 particles were fabricated by thermal solid state reaction method. The powder metallurgy technique was used to fabricate composites with varying Nb0.91Ti0.09Se2 mass fraction. The phase composition of Cu-based composites was identified by X-ray diffraction, and the morphology of NbSe2/Nb0.91Ti0.09Se2 and the worn surface of composites were characterized by scanning electron microscopy and transmission electron microscopy. In addition, the tribological properties of composites were appraised using a ball-on-disk multi-functional tribometer. The data of friction coefficient and resistivity were analyzed and the corresponding conclusion was drawn. Findings In comparison with the pure copper, Cu-based composites containing Nb0.91Ti0.09Se2/NbSe2 had a lower friction coefficient, illustrating the Nb0.91Ti0.09Se2 with nano-size particles prepared in this work is a perfect choice for the fabrication of excellent electrical contact composites. Compared to composites with NbSe2, composites containing Nb0.91Ti0.09Se2 have better tribological and electrical properties. Research limitations/implications Because of the use of thermal solid state reaction method, the size of NbSe2 and Nb0.91Ti0.09Se2 is relatively large. Therefore, the fabrication of finer particles of Nb0.91Ti0.09Se2 is encouraged. Originality/value In this paper, the authors discuss the tribological and electrical properties of Cu-based composites, and the value of optimum obtained as Nb0.91Ti0.09Se2 content is 15 Wt.%.

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Synthesis and tribological properties of Mo‐doped WSe₂ Nanolamellars

Cited by 19 publications

References 21 publications

First-principles calculations on structural, electronic properties of V-doped 2H-NbSe2

First-principles calculations on structural, electronic properties of V-doped 2H-NbSe2

Fabrication and Tribological Properties of Copper Matrix Solid Self-Lubricant Composites Reinforced with Ni/NbSe2 Composites

Tribological and electrical behavior of Cu-based composites with addition of Ti-doped NbSe₂nanoplatelets

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Synthesis and tribological properties of Mo‐doped WSe2 Nanolamellars

Cited by 19 publications

References 21 publications

First-principles calculations on structural, electronic properties of V-doped 2H-NbSe2

First-principles calculations on structural, electronic properties of V-doped 2H-NbSe2

Fabrication and Tribological Properties of Copper Matrix Solid Self-Lubricant Composites Reinforced with Ni/NbSe2 Composites

Tribological and electrical behavior of Cu-based composites with addition of Ti-doped NbSe2nanoplatelets

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Synthesis and tribological properties of Mo‐doped WSe₂ Nanolamellars

Tribological and electrical behavior of Cu-based composites with addition of Ti-doped NbSe₂nanoplatelets