Mechanochemical synthesis of tungsten carbide nano particles by using WO3/Zn/C powder mixture

Hoseinpur, Arman; Khaki, Jalil Vahdati; Marashi, Maryam Sadat

doi:10.1016/j.materresbull.2012.10.036

Cited by 20 publications

(3 citation statements)

References 23 publications

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“…Several methods, such as the spraying conversion process, 6,7 chemical vapor deposition, 8,9 combustion synthesis, 10,11 mechanical alloying, 12 carbothermal reduction, 13 and in situ synthesis, 14 have been proposed to prepare nanoscale WC powder or WC-Co composite powder. Among them, the carbothermal reduction method has the advantages of a simple process, low production cost, and good reproducibility, whereas low reaction temperatures and satisfactory mechanical properties for in situ synthesis exist.…”

Section: Introductionmentioning

confidence: 99%

Effects of carbothermal prereduction temperature and Co content on mechanical properties of WC–Co cemented carbides

Deng

Kang

Zhang

2023

Int J Applied Ceramic Tech

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WC–Co cemented carbides were prepared via an in situ synthesis method, including the carbothermal prereduction of WO3 and Co2O3 to remove all oxygen and a subsequent carbonization‐vacuum sintering process. The experimental results revealed that as the prereduction temperature increased from 1000 to 1200°C, the grain sizes of WC in WC–6Co and WC–12Co cemented carbides increased from .91 to 1.09 and .97 to 1.19 μm, respectively. Further, the fracture toughness of the sintered WC–6Co and WC–12Co cemented carbides increased from 9.97 to 10.83 and 11.11 to 18.30 MPa m1/2, respectively. In contrast, the hardness of the WC–6Co and WC–12Co cemented carbides decreased from 1477 to 1368 and 1351 to 1184 HV30, respectively. For a given prereduction temperature, an increase in Co content can improve the fracture toughness while lowering the hardness. In addition, an increase in the prereduction temperature or Co content led to an increase in the grain size of WC, which resulted in a transgranular fracture as the dominant mode.

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Section: Introductionmentioning

confidence: 99%

Effects of carbothermal prereduction temperature and Co content on mechanical properties of WC–Co cemented carbides

Deng

Kang

Zhang

2023

Int J Applied Ceramic Tech

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“…Tungsten oxides are most frequently used as starting material for producing metal tungsten powder [5] whereas, tungsten carbide synthesized by a solid-state reaction between W metal and C at 1200 -2000 º C under controlled atmosphere [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zirconia and Nickel Doping on the Reduction Behavior of Tungsten Oxide in Carbon Monoxide Atmosphere

Salleh¹,

Saharuddin²,

Samsuri³

et al. 2015

IJCEA

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“…In the present study, an innovative route to synthesize vanadium carbide by means of the mechanical activation of a mixture of vanadium oxide and carbon is developed. The milling of a metal oxide–carbon mixture is an economical and effective method that would decrease the energy needed for oxide reduction, and could be used in forming the corresponding metal carbide in the presence of sufficient carbon [ 20 , 21 , 22 ]. Few studies have investigated the synthesis of vanadium carbide by the mechanical activation of corresponding oxides.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Vanadium Carbide by Mechanical Activation Assisted Carbothermic Reduction

et al. 2020

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Vanadium carbide is known, for its hardness and other unique properties, as a refractory material. The synthesis of vanadium carbide is always associated with the utilization of expensive active metals, such as aluminum, calcium and magnesium, as a reducing agent to extract the vanadium metal from its corresponding oxide, followed by carbidization. The carbidization of reduced vanadium requires a complicated process and elevated temperature. Mechanical activation to synthesize vanadium carbide from its corresponding oxide and carbon source represents a promising, straightforward and less energy-intensive route. In the present study, vanadium carbide is synthesized by the carbothermic reduction of a mechanically activated mixture of V2O5 and carbon black as reducing agents without any additives. The reduction process is monitored by means of thermogravimetric analysis. The reduction products are characterized by X-ray diffraction and field emission scanning electron microscope. It is found that V8C7 with an average crystallite size of 88 nm can be synthesized from a V2O5-C mixture after milling for 15 h and further heating at 1050 °C for 1 h in an inert atmosphere.

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Mechanochemical synthesis of tungsten carbide nano particles by using WO3/Zn/C powder mixture

Cited by 20 publications

References 23 publications

Effects of carbothermal prereduction temperature and Co content on mechanical properties of WC–Co cemented carbides

Effects of carbothermal prereduction temperature and Co content on mechanical properties of WC–Co cemented carbides

Effect of Zirconia and Nickel Doping on the Reduction Behavior of Tungsten Oxide in Carbon Monoxide Atmosphere

Synthesis of Vanadium Carbide by Mechanical Activation Assisted Carbothermic Reduction

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