Preparation and Tribological Properties of Inorganic Fullerene‐like MoS<sub>2</sub>

Zou, T.Z.; Tu, Jiangping; Huang, Haidong; Lai, D.M.; Zhang, Lili; He, Dannong

doi:10.1002/adem.200500218

Cited by 35 publications

(17 citation statements)

References 16 publications

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“…Thus, nano-MoS 2 has attracted considerable attention, and some chemical routes to synthesize nanosized MoS 2 has been reported, including hydrothermal and solvothermal synthesis [4][5][6], decomposition of precursors [7,8], surfactant-assisted synthesis [9], vapor phase deposition [10], and inverse micelle method [11]. Usable MoS 2 includes layerclosed MoS 2 , such as inorganic fullerene-like nanoparticles and nano-tubes [12][13][14][15][16][17][18], as well as layer-opened MoS 2 , such as bulk micro-MoS 2 and slice-like nano-MoS 2 .…”

Section: Introductionmentioning

confidence: 99%

The Effect of Morphology on the Tribological Properties of MoS2 in Liquid Paraffin

et al. 2010

Tribol Lett

145

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The tribological properties of liquid paraffin (LP) containing molybdenum disulfide (MoS 2 ) additives, including nano-balls, nano-slices, and bulk 2H-MoS 2 , are evaluated using a four-ball tribometer. Results show that all MoS 2 additives used can improve the tribological properties of LP, and that nanosized MoS 2 particles function as lubrication additives in LP better than micro-MoS 2 particles do. The LP with nano-balls presents the best antifriction and antiwear properties at the MoS 2 content of 1.5 wt%. This is ascribed to the chemical stability of the layerclosed spherical structure of nano-balls. The Stribeck curves confirm that the rotation speed of 1,450 rpm used is located at the mixed lubrication region under 300 N. MoS 2 nano-slices have small sizes and easily enter into the interface of the friction pair with a roughness of 0.032 lm, functioning as a lubricant in LP better than nano-balls do at the MoS 2 content of 1.0 wt%. The Stribeck curves also show that the differences between the two nano samples were magnified at high rotation speeds in hydrodynamic lubrication region. The application of nano-slices in high sliding speeds will be more advantageous. This work furthers the understanding of the relationship between the tribological properties and morphology of MoS 2 .

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Section: Introductionmentioning

confidence: 99%

The Effect of Morphology on the Tribological Properties of MoS2 in Liquid Paraffin

et al. 2010

Tribol Lett

145

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“…Although it is quite facile to create hybrid dispersions or composites using this method, its application into device applications still needs further development. Other methods includ ing hydrothermal methods that were employed to synthesize MoS 2 nanosheet have similar limitations [10][11][12] . Therefore, large area synthesis of monolayer and few-layer MoS 2 that is compatible with current micro-or nano-fabrication processes will greatly facilitate the integration of this fascinating material into future device applications.…”

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Large‐Area Vapor‐Phase Growth and Characterization of MoS₂ Atomic Layers on a SiO₂ Substrate

Zhan

Liu

Najmaei

et al. 2012

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“…The good bioresorbability of amorphous calcium phosphates is well documented in literature. [18,19] The transition of a crystalline phase to an amorphous phase is an energy-absorbing process and usually occurs at high temperatures. However, the energy demanded by the transformation of Na 2 Ca 2 Si 3 O 9 to the amorphous calcium phosphate phase might also be supplied by the release of high surface energy, which expedites the transition at low temperature (e.g.…”

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Coupling Mechanical Competence and Bioresorbability in Bioglass^®‐Derived Tissue Engineering Scaffolds

Chen

Boccaccını

2006

Adv Eng Mater

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exhibits a marked "pseudo-plastic" behaviour during the high temperature test. Similar values of fracture strength were measured at room temperature and at 1200°C confirming that the testing temperature does not induce fibre damage. Thus applications of the present composites at temperatures up to 1200°C are possible. The assessment of thermal aging effects and the thermal shock behaviour of the composites are the focus of current research. ExperimentalThe used oxide fibre mats were of the type Nextel TM 720 (3M Corporation, ST. Paul, MN, USA). These woven fabrics contain ∼ 400 individual filaments with diameters between 10 and 12 lm. As precursor for the oxide ceramic matrix a-Al 2 O 3 powder (AKP-50, Sumitomo, Chemicals, Tokyo, Japan) with particle size between 100 and 300 nm were used. The powder were dispersed in ethanol medium to avoid gas evolution, which may occur in deposition from aqueous suspensions. [7] The composition of the suspension used for the EPD experiments was based on a concentration of 25 wt-% a-Al 2 O 3 in ethanol and the addition of adequate concentrations of additives, as optimized and described in our previous work. [6] The complete process of fabrication is shown in Figure 1. EPD was carried out using a novel EPD cell, shown in Figure 2(b). A constant electric field of 50 V/cm was applied for all the experiments.After EPD, the green bodies were dried in air at ambient temperature and the densification of the composite was carried out in air by a pressureless sintering process at temperatures between 1250°C and 1300°C. Upon reaching the sintering temperature the composites were cooled down in the furnace, thus no holding time at the sintering temperature was applied. From sintered discs of nominal 2.5 mm thickness, test bars of appropriate dimensions (length: 50 mm, width: 4.5 mm) were cut for mechanical property measurements.Four point bending strength tests were carried out to characterize the mechanical behaviour of the composites. The flexural strength was determined in a Zwick Z50 testing machine equipped with high temperature furnace (up to 1200°C). The composites were tested at ambient temperature and at 1200°C using a rig with an inner span of 20 mm and an outer span of 40 mm. Specimen deflection was measured by high precision inductive transducer applying one measuring and two reference transmission rods directly to the specimen. The heating rate was in the range 8-10°C/min. The holding time at the test temperature before starting the test was 15 min. The crosshead speed was 0.1 mm/ min and the load cell capacity 1 kN.Tissue engineering uses a scaffold made of a suitable biomaterial to induce the regeneration of diseased or injured tissue. [1,2] Ideally, the scaffold materials should be biocompatible, support/foster cells, temporarily replace the mechanical COMMUNICATIONS ADVANCED ENGINEERING MATERIALS 2006, 8, No. 4 285 Fig. 5. Crack deflection in an oxide-oxide ceramic matrix composite reinforced with 6 fibre mats (a-Al 2 O 3 /Nextel TM 720) tested in four point bending at ...

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Preparation and Tribological Properties of Inorganic Fullerene‐like MoS₂

Cited by 35 publications

References 16 publications

The Effect of Morphology on the Tribological Properties of MoS2 in Liquid Paraffin

The Effect of Morphology on the Tribological Properties of MoS2 in Liquid Paraffin

Large‐Area Vapor‐Phase Growth and Characterization of MoS₂ Atomic Layers on a SiO₂ Substrate

Coupling Mechanical Competence and Bioresorbability in Bioglass^®‐Derived Tissue Engineering Scaffolds

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Preparation and Tribological Properties of Inorganic Fullerene‐like MoS2

Cited by 35 publications

References 16 publications

The Effect of Morphology on the Tribological Properties of MoS2 in Liquid Paraffin

The Effect of Morphology on the Tribological Properties of MoS2 in Liquid Paraffin

Large‐Area Vapor‐Phase Growth and Characterization of MoS2 Atomic Layers on a SiO2 Substrate

Coupling Mechanical Competence and Bioresorbability in Bioglass®‐Derived Tissue Engineering Scaffolds

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Preparation and Tribological Properties of Inorganic Fullerene‐like MoS₂

Large‐Area Vapor‐Phase Growth and Characterization of MoS₂ Atomic Layers on a SiO₂ Substrate

Coupling Mechanical Competence and Bioresorbability in Bioglass^®‐Derived Tissue Engineering Scaffolds