Influence of sulfides on the tribological properties of composites produced by pulse electric current sintering

Kim, Seung Ho

doi:10.1007/s12613-014-0871-3

Cited by 10 publications

(4 citation statements)

References 15 publications

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“…Not only metal matrix composites, but ceramics also use sulphides for improving friction and wear properties, e.g. MoS2 and WS2 reduces CoF of Al2O3 -15 wt% ZrO2 from 0.50 to 0.27 when added in 1 -10 wt% [68]. Both MoS2 and WS2 reduce CoF when added to WC drill bit material in the amounts of 2 -10 vol% [69].…”

Section: Lamellar Solidsmentioning

confidence: 99%

Al2O3–cBN composites sintered by SPS and HPHT methods

Klimczyk

Cura

Vlaicu

et al. 2016

Journal of the European Ceramic Society

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Section: Lamellar Solidsmentioning

confidence: 99%

Al2O3–cBN composites sintered by SPS and HPHT methods

Klimczyk

Cura

Vlaicu

et al. 2016

Journal of the European Ceramic Society

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“…Growth of these planes, however, was restricted to the WS 2 /1 wt % rGO sample because of rGO nanosheets. , In addition, minor peaks were observed for sulfur (S, 18.55° and 21.35°) and tungsten carbide (WC, 31.45°, 48.25°, and 63.95°) in WS 2 /1 wt % rGO sample, as indicated by the diamond and circle symbols, respectively. Considering that the decomposition temperature of WS 2 is reported to be 1313∼1533 K with high thermal stability, , the high temperature of the SPS process in this experiment (1473 K) might have had a slight effect on the decomposition of WS 2 . Moreover, it is reported that the nucleation and growth of WC in the composite was formed during the thermal annealing at temperatures above 1073 K. , Carbon atoms from GO were easily diffused into vacancies in WS 2 particles at high temperature .…”

Section: Resultsmentioning

confidence: 79%

Control of Electrical and Thermal Transport Properties by Hybridization of Two-Dimensional Tungsten Disulfide and Reduced Graphene Oxide for Thermoelectric Applications

Kim

Bark

Nam

et al. 2018

ACS Sustainable Chem. Eng.

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Thermoelectric efficiency is determined by the figure of merit (ZT) with the achievement of high electrical conductivity (σ), high Seebeck coefficient (S), and low thermal conductivity (k) for high performance thermoelectric devices. Tungsten disulfide (WS 2 ) has been reported to have a comparably high S (3.5 × 10 2 ∼9.5 × 10 2 μV/K) and low σ (10 −2 −10 −1 S/m), which leads to a low ZT value (approximately 0). In this study, WS 2 particles were hybridized with highly conductive reduced graphene oxide (rGO) particles (∼10 5 S/m). The inclusion of rGO provides conductive paths for the transfer of carriers in the composites, and thus, this led to an increase in σ (∼3 × 10 3 S/m). The hybrid material of WS 2 /rGO, as a function of the weight percentage of rGO, was fabricated by spark plasma sintering. As a result, the power factor in a WS 2 / 0.8 wt % rGO (87 μW/mK 2 ) with enhanced σ was 310% greater than that of WS 2 . Moreover, two-dimensional structures of the materials contributed to the induction of phonon scattering and resulted in steady k in spite of enhanced σ with increased rGO content. Consequently, an optimized ZT value was obtained for the WS 2 /0.8 wt % rGO sample; this value was 260% greater (approximately 6.8 × 10 −4 ) than that of WS 2 without rGO (approximately 1.9 × 10 −4 ).

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“…In recent decades, there has been an increasing interest to produce the new materials for tribological applications, due to the constant development of modern equipment. [1][2][3] 424 GAJIĆ et al Concerns in the use of compounds containing lead, cadmium, antimony, etc., as tribological materials have been raised, since these metals are harmful for human health and the environment. [4][5][6] According to U.S. Environmental Protection Agency and the International Agency for Research on Cancer these metals have high degree of toxicity and so they are classified as human carcinogens.…”

Section: Introductionmentioning

confidence: 99%

“…GAJIĆ et al 3. It reduces the amount of unreacted S powder and its loss which evaporates in the form of elemental S and/or SO 2 into the atmosphere during reaction.…”

mentioning

confidence: 99%

Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive

Gajić¹,

Kamberović²,

Anđić³

et al. 2019

JSCS

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The aim of this research was to study the effect of graphite addition in the process of synthesis of tribological materials based on tin sulphides. The tin sulphides powders were synthesized from selected precursors by pyrometallurgical method in rotary tilting tube furnace. The thermodynamic parameters of the synthesis were determined using HSC Chemistry software modelling package. In addition, the synthesis process was also characterized by the thermal analysis method: simultaneous differential scanning calorimetry and thermogravimetry (DCS-TGA). The characterization of the synthesized tin sulphides powders included analysis of chemical composition by optical emission spectroscopy, phase composition identification by X-ray diffraction (XRD) and examination of morphology, as well as elemental composition by scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS). The hexagonal SnS 2 and orthorhombic Sn 2 S 3 phases were formed after the thermal treatment of starting powders in nitrogen atmosphere. The obtained results indicate the positive effects of the graphite addition which enables the synthesis of tin sulphide powders with appropriate content of sulphide phases with minimal loss of sulphur.

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Influence of sulfides on the tribological properties of composites produced by pulse electric current sintering

Cited by 10 publications

References 15 publications

Al2O3–cBN composites sintered by SPS and HPHT methods

Al2O3–cBN composites sintered by SPS and HPHT methods

Control of Electrical and Thermal Transport Properties by Hybridization of Two-Dimensional Tungsten Disulfide and Reduced Graphene Oxide for Thermoelectric Applications

Improving the synthesis process of tribological materials based on tin sulphides by adding graphite as additive

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