The influence of the fluoride process of tungsten deposition parameters on the properties of tungsten self-composites obtained by chemical vapor infiltration

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Abstract

The influence of the parameters of the chemical vapor infiltration process of tungsten powder on the depth of its impregnation, mechanical properties and density of the obtained blanks is studied. It was found that the depth of infiltration depends on the rate of chemical vapor deposition of tungsten, and the maximum bend strength is achieved the sample, obtained at temperature of 450 °C and a gas pressure of 133 mbar. The method of chemical vapor infiltration is promising for the development of technology of additive manufacture of the items made of tungsten and composites based on it.

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About the authors

T. N. Bukatin

The National University of Science and Technology MISIS

Author for correspondence.
Email: bukatin.t@gmail.com
Russian Federation, Moscow, 119049

D. Y. Karpenkov

The National University of Science and Technology MISIS

Email: bukatin.t@gmail.com
Russian Federation, Moscow, 119049

V. V. Dushik

Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Email: bukatin.t@gmail.com
Russian Federation, Moscow, 119071

D. V. Ten

The National University of Science and Technology MISIS

Email: bukatin.t@gmail.com
Russian Federation, Moscow, 119049

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Supplementary files

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2. Fig. 1. Schematic diagram of the installation for chemical vapor deposition of tungsten.

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3. Fig. 2. SEM images of cross-sections of manufactured self-composite samples.

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4. Fig. 3. Results of three-point bending tests of samples.

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5. Fig. 4. Images of fractures of samples after three-point bending tests: impregnated tungsten powder at a gas mixture pressure of 0.13 mbar (a) and at a gas mixture pressure of 133 mbar (b); tungsten produced by selective laser melting (c); tungsten produced using powder metallurgy technology (d); tungsten obtained by chemical vapor deposition (d).

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