Effect of precursor mass on product phase composition in plasma dynamic synthesis of tungsten carbide
Электронный архив ТПУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Effect of precursor mass on product phase composition in plasma dynamic synthesis of tungsten carbide
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| Автор |
Shatrova, K. N.
Sivkov, Aleksandr Anatolyevich Shanenkov, Ivan Igorevich Saigash, Anastasiya Sergeevna |
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| Тематика |
прекурсоры
динамический синтез карбид вольфрама каталитические свойства порошки |
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| Описание |
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.
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| Дата |
2017-06-08T04:19:13Z
2017-06-08T04:19:13Z 2017 |
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| Тип |
Conference Paper
Published version (info:eu-repo/semantics/publishedVersion) Conference paper (info:eu-repo/semantics/conferencePaper) |
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| Идентификатор |
Effect of precursor mass on product phase composition in plasma dynamic synthesis of tungsten carbide / K. N. Shatrova [et al.] // Journal of Physics: Conference Series. — 2017. — Vol. 830 : Energy Fluxes and Radiation Effects 2016 : 5th International Congress, 2–7 October 2016, Tomsk, Russian Federation : [materials]. — [012119, 5 p.].
http://earchive.tpu.ru/handle/11683/39497 10.1088/1742-6596/830/1/012119 |
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| Язык |
en
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| Связанные ресурсы |
Journal of Physics: Conference Series. Vol. 830 : Energy Fluxes and Radiation Effects 2016. — Bristol, 2017.
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| Права |
Open access (info:eu-repo/semantics/openAccess)
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IOP Publishing
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