Molten salt synthesis of in-situ TiC coating on graphite flakes

Behboudi, Fatemeh; Kakroudi, Mahdi Ghassemi; Vafa, Nasser Pourmohammadie; Faraji, Mostafa; Milani, Sahar Sajjadi

doi:10.1016/j.ceramint.2020.11.172

Cited by 22 publications

(14 citation statements)

References 41 publications

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“…Hence, the addition of VC to ZrB 2 -SiC composites can be the possible mechanism for ZrO 2 removal and acceleration of densification process. Reaction (4) occurs at high temperatures and very low CO vapor pressures, followed by Reactions ( 5) and (6). The B 2 O 3 at first melts at 450 • C, which helps the particles to densify.…”

Section: Resultsmentioning

confidence: 99%

“…At high‐temperature applications, the devices must be made of a group of materials named ultrahigh‐temperature ceramics (UHTC). These materials are limited to less than 20 items such as ZrB 2 , 1–4 NbC, 5 TiC, 6,7 TaC, 8,9 TiB 2 , 10–12 etc. ZrB 2 ‐based ceramics and composites have a matchless combination of characteristics such as high melting points, high conductivities (thermal and electrical), low tendency to the chemical reactions with molten metals, and outstanding thermal shock resistance 13–15 …”

Section: Introductionmentioning

confidence: 99%

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On the oxidation behavior of ZrB₂–SiC–VC composites

Arab

Asl

Kakroudi

et al. 2021

Int J Applied Ceramic Tech

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In this study, near‐fully dense ZrB2–SiC–VC (75‐20‐5 vol%) composite was manufactured through hot pressing at 1850°C under the pressure of 40 MPa for 60 min. Then the oxidation examination of the composite was carried out under different durations and temperatures. The microstructure and phase evolution after hot pressing and oxidation processes were examined by scanning electron microscopy, and X‐ray diffractometry. The VC addition led to the formation of ZrC and VSi2 phases, which assisted the densification of the composite by removing ZrO2 from the particles’ surface. The oxides of ZrO2, SiO2, ZrSiO4, V2O5, and VO2 formed distinct layers on the sample during the oxidation at 1700°C for 4 h with a parabolic regimen and activation energy of 177.5 kJ/mol.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the oxidation behavior of ZrB₂–SiC–VC composites

Arab

Asl

Kakroudi

et al. 2021

Int J Applied Ceramic Tech

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“…Numerous efforts have been devoted to improving the thermal conductivity of metal matrix composites; however, there is a paucity of research literature on magnesium-based composites. The commonly used coating methods for diamond surfaces include the molten salt method, vacuum micro-evaporation, chemical vapor deposition, magnetron sputtering, and sol-gel [24,25]. The molten salt method is one of the most commonly used coating methods due to its low cost.…”

Section: Introductionmentioning

confidence: 99%

Effects of Chromium Carbide Coatings on Microstructure and Thermal Conductivity of Mg/Diamond Composites Prepared by Squeeze Casting

Ren

Ru³

et al. 2022

Materials

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Magnesium matrix composites are considered a desired solution for lightweight applications. As an attractive thermal management material, diamond particle-reinforced Mg matrix (Mg/diamond) composites generally exhibit thermal conductivities lower than expected. To exploit the potential of heat conduction, a combination of Cr coating on diamond particles and squeeze casting was used to prepare Mg/diamond (Cr) composites. The thickness of the Cr coating under different coating processes (950 °C/30 min, 950 °C/60 min, 950 °C/90 min, 1000 °C/30 min, and 1050 °C/30 min) was measured by FIB-SEM to be 1.09–2.95 μm. The thermal conductivity (TC) of the Mg/diamond composites firstly increased and then decreased, while the coefficient of thermal expansion (CTE) of Mg/diamond (Cr) composite firstly decreased and then increased with the increase in Cr coating thickness. The composite exhibited the maximum TC of 202.42 W/(m·K) with a 1.20 μm Cr coating layer, while a minimum CTE of 5.82 × 10−6/K was recorded with a coating thickness of 2.50 μm. The results clearly manifest the effect of Cr layer thickness on the TC and CTE of Mg/diamond composites.

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“…As a well-known ultra-high-temperature ceramic (UHTC), titanium carbide (TiC) has a wide range of physical and mechanical characteristics, e.g., low neutron absorption cross-section, excellent hardness, high thermal resistivity, superior melting point (3160 °C), high chemical stability, and low density [1][2][3][4]. Offering such outstanding properties has made this ceramic as an excellent nomination for many high-temperature structural applications, particularly in automotive, nuclear, defense, and aerospace industrial ends [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effects of carbon nano-additives on characteristics of TiC ceramics prepared by field-assisted sintering

Jafargholinejad

Soheyl

2021

Synth. Sinter.

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Five carbonaceous nano-additives (graphite, graphene, carbon black, carbon nanotubes, and diamond) had different impacts on the sinterability, microstructural evolution, and properties of titanium carbide. In this research, the sintering by spark plasma was employed to produce the monolithic TiC and carbon-doped ceramics under the sintering parameters of 1900 ºC, 10 min, 40 MPa. The carbon black additive had the best performance in densifying the TiC, thanks to its fine particle size, as well as its high chemical reactivity with TiO2 surface oxide. By contrast, the incorporation of nano-diamonds resulted in a considerable decline in the relative density of TiC owing to the graphitization phenomenon, together with the gas production at high temperatures. Although carbon precipitation from the TiC matrix occurred in all samples, some of the added carbonaceous phases promoted this phenomenon, while the others hindered it to some extent. Amongst the introduced additives, carbon black had the most contribution to grain refining, so that a roughly halved average grain size was attained in comparison with the undoped specimen. The highest values of hardness (3233 HV0.1 kg), thermal conductivity (25.1 W/mK), and flexural strength (658 MPa) secured for the ceramic incorporated by 5 wt% nano carbon black.

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Molten salt synthesis of in-situ TiC coating on graphite flakes

Cited by 22 publications

References 41 publications

On the oxidation behavior of ZrB₂–SiC–VC composites

On the oxidation behavior of ZrB₂–SiC–VC composites

Effects of Chromium Carbide Coatings on Microstructure and Thermal Conductivity of Mg/Diamond Composites Prepared by Squeeze Casting

Effects of carbon nano-additives on characteristics of TiC ceramics prepared by field-assisted sintering

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Molten salt synthesis of in-situ TiC coating on graphite flakes

Cited by 22 publications

References 41 publications

On the oxidation behavior of ZrB2–SiC–VC composites

On the oxidation behavior of ZrB2–SiC–VC composites

Effects of Chromium Carbide Coatings on Microstructure and Thermal Conductivity of Mg/Diamond Composites Prepared by Squeeze Casting

Effects of carbon nano-additives on characteristics of TiC ceramics prepared by field-assisted sintering

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On the oxidation behavior of ZrB₂–SiC–VC composites

On the oxidation behavior of ZrB₂–SiC–VC composites