Effect of the Conditions of Formation of W–C Nanopowders in a Plasma Jet on the Synthesis of Hexagonal Tungsten Carbide

被引：4

作者：

Blagoveshchensky Y.V. ^{[1
]}

Alexeev N.V. ^{[1
]}

Samokhin A.V. ^{[1
]}

Isaeva N.V. ^{[1
]}

Sinaysky M.A. ^{[1
]}

Tsvetkov Y.V. ^{[1
]}

机构：

[1] Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (IMET RAS), Moscow

来源：

Inorganic Materials: Applied Research | 2019年 / 10卷 / 03期

关键词：

evaporation; low-temperature synthesis; mixing conditions; plasma chemical synthesis; tungsten carbide; ultrafine powders;

D O I：

10.1134/S2075113319030043

中图分类号：

学科分类号：

摘要：

Abstract: The effects of the conditions of a raw material introduction as well as mixing of it with a high-temperature gas flow under the plasma chemical synthesis of superdispersed powder of W–C have been studied. In the case of incomplete raw material evaporation and its fast quenching, preferred cubic tungsten carbide β-WC formation is found to occur, as well as nano- and microparticles with a complicated phase composition. In the case of complete raw material evaporation, the products of reducing synthesis are nanopowder of tungsten or semicarbide W2C depending on the amount of hydrocarbon introduced. There is a second stage of the process of low-temperature synthesis which leads to a single-phase of tungsten carbide α-WC formation. Complete evaporation of raw material must be ensured in the plasma chemical process for obtaining of α-WC powder with a maximum specific surface area. © 2019, Pleiades Publishing, Ltd.

引用

页码：566 / 571

页数：5

共 9 条

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