Investigations on surface morphologies, microstructure and thermal properties of tungsten-based composites

Ertuǧrul Demir, Matlab N. Mirzayev*, A. Beril Tugrul, Yury M. Gledenov, Vitali A. Turchenko, Ozan Yllmaz, Bülent Buÿük, M. Lütfi Öveçoǧlu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The purpose of this research is to determine the surface morphologies, microstructural and thermal properties of tungsten-based composites that consist of 93 wt.% tungsten (W), 6 wt.% vanadium carbide (VC) and 1 wt.% graphite (C) powders. W-6 wt.% VC-1 wt.% C powders were mechanically alloyed (MA'd) for 6 hrs using a SpexTM with a rate rpm using tungsten carbide vial and balls and sintered at 1750°C for under N2, H2 gas flow conditions. The phase composition and microstructural characterization of the tungsten composites were carried out using X-ray diffractometer (XRD), Scanning Electron Microscopy (SEM) and Raman Spectroscopy. SEM images showed the distribution of the tungsten (W), vanadium carbide (VC) and graphite (C) powders and porosity in the tungsten matrix. The Raman spectra exhibited two major peaks, which are recorded at 1331 (vs) cm-1 and 1583 (vs) cm-1 in the Raman spectra. These bands represented carbon phases such as disordered graphite (D) and graphite (G). Thermogravimetric analysis (TGA) measurements were performed to obtain the weight loss and thermal stability of samples in the temperature range 30-1100°C under argon gas atmosphere. The TG curve revealed a total loss of 3.3% of weight at this temperature range. It is considered that the cause of mass loss is due to the oxidation and gas desorption of materials.

Original languageEnglish
Article number1950216
JournalModern Physics Letters B
Volume33
Issue number19
DOIs
Publication statusPublished - 10 Jul 2019

Bibliographical note

Publisher Copyright:
© 2019 World Scientific Publishing Company.

Funding

The authors wish to thank the staff of the Joint Institute for Nuclear Research (JINR) for collaboration in these experiments.

FundersFunder number
Joint Institute for Nuclear Research

    Keywords

    • fusion
    • radiation shielding
    • Raman spectroscopy
    • TG analysis
    • Tungsten-based composites

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