Preparation of titanium carbide powders by carbothermal reduction of titania/charcoal at vacuum condition

Sen, Wei; Sun, Hong; Yang, Bin; Xu, Baoqiang; Ma, Wenhui; Liu, Dachun; Dai, Yongnian

doi:10.1016/j.ijrmhm.2010.06.005

Cited by 57 publications

(22 citation statements)

References 19 publications

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“…As can be observed, the Mo 2 C and WC peaks disappeared at temperatures of 1150 and 1200°C, respectively, indicating that the diffusion of Mo 2 C and WC into the Ni binder phase and hard phase proceeded completely as the temperature reached 1200°C. Previous publications have reported that the last intermediate product in the reduction in TiO 2 is Ti(C,O), since the Ti(C,O) solid solution can form easily . Moreover, although the intensity of the TiN peak decreased continuously with the increasing temperature, TiN still existed at the temperature of 1250°C.…”

Section: Resultsmentioning

confidence: 88%

Microstructure evolution and characteristic of Ti(C,N)‐based cermets prepared by in situ carbothermal reduction in TiO₂

et al. 2018

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Ti(C,N)-based cermets were prepared by in situ carbothermal reduction in TiO 2 and subsequent liquid phase sintering under vacuum. The prepared cermets were examined using XRD, SEM, TEM, and EDX. During solid-state sintering, fine TiC particles were formed through the carbothermal reduction in TiO 2 . A great number of (Ti,W,Mo)C complete solid solutions containing more W and Mo subsequently formed through the counter diffusion of the fine TiC and carbides. The majority of the coarse TiN particles in the raw powders remained undissolved. During liquid phase sintering, Ti-based carbonitride complex solid solutions with less W or Mo precipitated on the coarse TiN particles and fine (Ti,W,Mo)C particles, resulting in black core/gray rim structures and white core/gray rim structures, respectively. Moreover, small amounts of Ti-based carbonitride complex solid solutions precipitated directly from the liquid binder phase in some areas enriched in W and Mo during the cooling stage after sintering, resulting in coreless grains.Ultimately, after being sintered at 1400°C for 1 hour, the present cermets were characterized with white core/gray rim grains, black core/gray rim grains and a few gray grains. In addition, the interfaces between the black core/gray rim grains and binder phase were atomically smooth, exhibiting a ð200Þ R ==ð11 1Þ B orientation relationship with a perfect coherency state. K E Y W O R D Scarbothermal reduction, cermets, microstructure characteristic, microstructure evolution, TiO 2

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Section: Resultsmentioning

confidence: 88%

Microstructure evolution and characteristic of Ti(C,N)‐based cermets prepared by in situ carbothermal reduction in TiO₂

et al. 2018

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“…It has been reported that the carburizing rate of titanium dioxide, TiO 2 into TiC can be accelerated by using the finest and homogenous carbon powder (Maitre et al, 2000). Sen et al produced fine and homogeneous TiC powders by carbothermal reduction of titania/charcoal in a vacuum furnace at different reaction temperatures from 1100 °C to 1550 °C (Sen et al, 2010). They observed that reaction temperature increases, uniform crystal grain arises with the liberation of much CO and higher temperature (at 1550 o C) produced large amount of TiC.…”

Section: Thermal Carburizationmentioning

confidence: 99%

Surface Modification Techniques for Biomedical Grade of Titanium Alloys: Oxidation, Carburization and Ion Implantation Processes

Izman¹,

Abdul-Kadir²,

Anwar³

et al. 2012

Titanium Alloys - Towards Achieving Enhanced Properties for Diversified Applications

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“…[1][2][3] The conventional method for producing TiC is the Acheson process, in which the carbothermic reduction of TiO 2 by carbon, TiO 2 + C → TiC + CO, is carried out at high temperatures above 1573 K for several hours in hydrogen or argon. [2][3][4][5][6][7][8] Recently, it is preferable to synthesise TiC at lower temperatures in shorter periods for the sake of reducing energy costs and for the protection of a clean environment. 3 In comparison with above carbothermic reduction routes, the solid state synthesis of Ti+C→TiC has attracted increasing attention because of its energy-efficient and zero oxycarbide emission.…”

Section: Introductionmentioning

confidence: 99%

Low-temperature solid state synthesis of TiC from Ti/C elemental powder mixture induced by polytetrafluoroethylene

Wang

Zhang

et al. 2015

Materials Research Innovations

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In order to significantly reduce the synthesis temperature, polytetrafluoroethylene was employed to induce the solid state synthesis of titanium carbide from elemental reactants. According to differential thermal analysis and X-ray diffraction results, titanium carbide can be synthesised successfully at the temperature as low as 825 K from Ti/C mixture with 3 wt-% polytetrafluoroethylene addition. The field emission scanning electron microscopy image showed that the size of the as-prepared titanium carbide particle was smaller than 150 nm.

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Preparation of titanium carbide powders by carbothermal reduction of titania/charcoal at vacuum condition

Cited by 57 publications

References 19 publications

Microstructure evolution and characteristic of Ti(C,N)‐based cermets prepared by in situ carbothermal reduction in TiO₂

Microstructure evolution and characteristic of Ti(C,N)‐based cermets prepared by in situ carbothermal reduction in TiO₂

Surface Modification Techniques for Biomedical Grade of Titanium Alloys: Oxidation, Carburization and Ion Implantation Processes

Low-temperature solid state synthesis of TiC from Ti/C elemental powder mixture induced by polytetrafluoroethylene

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Preparation of titanium carbide powders by carbothermal reduction of titania/charcoal at vacuum condition

Cited by 57 publications

References 19 publications

Microstructure evolution and characteristic of Ti(C,N)‐based cermets prepared by in situ carbothermal reduction in TiO2

Microstructure evolution and characteristic of Ti(C,N)‐based cermets prepared by in situ carbothermal reduction in TiO2

Surface Modification Techniques for Biomedical Grade of Titanium Alloys: Oxidation, Carburization and Ion Implantation Processes

Low-temperature solid state synthesis of TiC from Ti/C elemental powder mixture induced by polytetrafluoroethylene

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About

Microstructure evolution and characteristic of Ti(C,N)‐based cermets prepared by in situ carbothermal reduction in TiO₂

Microstructure evolution and characteristic of Ti(C,N)‐based cermets prepared by in situ carbothermal reduction in TiO₂