Effect of precursor mass on product phase composition in plasma dynamic synthesis of tungsten carbide; Journal of Physics: Conference Series; Vol. 830 : Energy Fluxes and Radiation Effects 2016

Effect of precursor mass on product phase composition in plasma dynamic synthesis of tungsten carbide; Journal of Physics: Conference Series; Vol. 830 : Energy Fluxes and Radiation Effects 2016

Bibliographic Details
Parent link:Journal of Physics: Conference Series
Vol. 830 : Energy Fluxes and Radiation Effects 2016.— 2017.— [012119, 5 p.]
Corporate Author: Национальный исследовательский Томский политехнический университет (ТПУ) Энергетический институт (ЭНИН) Кафедра электроснабжения промышленных предприятий (ЭПП)
Other Authors: Shatrova K. N., Sivkov A. A. Aleksandr Anatolyevich, Shanenkov I. I. Ivan Igorevich, Saigash A. S. Anastasiya Sergeevna
Summary:Title screen
An interest in WC[1-x] cubic tungsten carbide results from its catalytic properties similar to those of platinum group metals and the synergistic effect between WC[1-x] and Pt in reactions of hydrogen evolution and hydrogen oxidation. However, according to the phase diagram of the W–C system, the cubic phase WC[1-x] only exists in a narrow range of temperature stability (about 2798–3058 K), which makes it difficult for being obtained. To date, there are different methods for synthesizing tungsten carbide powder with a low content of cubic phase that complicates the study of WC[1-x] properties. A direct plasma dynamic synthesis is known as one of the promising methods to produce WC[1-x]. The aim of this work is to find the optimal amount of tungsten precursor to obtain cubic tungsten carbide with a high purity by plasma dynamic method. The synthesized products were examined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD patterns showed that the main phase was cubic tungsten carbide with negligible content of hexagonal tungsten carbide W[2]C and pure tungsten W. According to a quantitative analysis of synthesized products, which were obtained using masses of initial tungsten equal to 1.0, 0.7, 0.6 and 0.5 gram, the yield of WC[1-x] phase was 84, 89, 95 and 92 wt%, respectively. The results of TEM displayed that the synthesized powders consist of crystallites, having the size less than 100 nm (WC[1-x]), and a carbon matrix. This carbon was not detected in XRD due to its presence as an amorphous phase.
Language:English
Published: 2017
Series:Modification of materials with particle beams and plasma flows
Subjects:
электронный ресурс
труды учёных ТПУ
прекурсоры
динамический синтез
карбид вольфрама
каталитические свойства
порошки
Online Access:http://dx.doi.org/10.1088/1742-6596/830/1/012119
http://earchive.tpu.ru/handle/11683/39497
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=654942

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