# Combined effect of SiC and carbon on sintering kinetics, microstructure and mechanical properties of fine-grained binderless tungsten carbide

Source: [Combined effect of SiC and carbon on sintering kinetics, microstructure and mechanical properties of fine-grained binderless tungsten carbide](<https://www.sota2.com/research/paper/68fa45fa1e209131ce91cddd>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T05:34:54.642Z

Authors: E.A. Lantsev, P.V. Andreev, A.V. Nokhrin, Yu.V. Blagoveshchenskiy, N.V. Isaeva, M.S. Boldin, A.A. Murashov, G.V. Shcherbak, K.E. Smetanina, V.N. Chuvil'deev, N.Yu. Tabachkova (3, 4) \_\_INSTITUTION\_11\_\_ Lobachevsky State University of Nizhny Novgorod, (2) A.A. Baykov Institute of Metallurgy, Materials Science of the Russian Academy of Sciences, (3) National University of Science, Technology "MISIS", (4) A.M. Prokhorov General Physics Institute of the Russian Academy of Sciences)

Published: 2023-12-27T14:11:15.000Z

## Abstract

The study investigates the density, phase composition, microstructure and mechanical properties (microhardness, fracture toughness) of binderless WC + SiC and WC + SiC + C ceramics obtained by Spark Plasma Sintering (SPS). Nanopowders of a-WC produced by DC arc plasma chemical synthesis were used as raw materials. Powder compositions for sintering contained graphite (0.3, 0.5% wt.) or b-SiC (1, 3, 5% wt.) with 0.3% wt. graphite. It was shown that WC + 1% wt. SiC + 0.3% wt.C ceramics have a homogeneous fine-grained microstructure, high relative density, increased microhardness and Palmquist fracture toughness (Indentation Fracture Resistance). The kinetics of the initial sintering stage of WC + C and WC + C + SiC powder compositions was also analyzed using high-temperature dilatometry at the conventional pressureless sintering (CPS) conditions. The CPS and SPS activation energies of WC + SiC powder at the intensive shrinkage stage were determined using the Young-Cutler model. The CPS activation energies of WC, WC + C and WC + C + SiC powder compositions are close to the activation energy of diffusion of the carbon C along the a-WC grain boundaries. The SPS activation energies of WC + C and WC+ C + SiC powder compositions turn out to be lower than the activation energy of the C of a-WC grain boundary.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2312.16579>)

[PDF](<https://arxiv.org/pdf/2312.16579.pdf>)