Study of the Phase Composition and Microstructure of Complex Carbide (Ti, W)C Obtained by Spark Plasma Sintering of WC and TiC Powders

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Inorganic Materials: Applied Research Pub Date : 2024-06-03 DOI:10.1134/S2075113324700114

A. V. Terent’ev, Yu. V. Blagoveshchenskij, N. V. Isaeva, E.A. Lancev, K. E. Smetanina, A. A. Murashov, A. V. Nokhrin, M. S. Boldin, V. N. Chuvil’deev, G. V. Shcherbak

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Abstract—The possibility of low-temperature in situ synthesis of (Ti, W)C using plasma-chemical WC nanopowders and industrial micron TiC powders is demonstrated. Sintering/synthesis of WC–(25, 50, and 75) wt % TiC is carried out by electric pulsed (“spark”) plasma sintering (SPS) by heating powders in a vacuum at a rate of 50°C/min to a temperature of more than 1200°C under conditions of applying a stress of 70 MPa. It is established that the synthesis proceeds most efficiently in nanopowders with an addition of 50 and 75 wt % TiC. It is shown that the joint use of plasma-chemical synthesis of nanopowders and SPS makes it possible to obtain fine-grained (with a grain size of less than 1 μm) samples with increased density and satisfactory mechanical properties (Vickers hardness is 17–18 GPa, and minimum Palmquist crack resistance coefficient is ~3 MPa m^1/2).

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通过火花等离子烧结 WC 和 TiC 粉末获得的复合碳化物 (Ti, W)C 的相组成和显微结构研究

摘要--利用等离子化学 WC 纳米粉体和工业微米 TiC 粉体低温原位合成 (Ti, W)C 的可能性得到了证实。在施加 70 兆帕应力的条件下，通过电脉冲（"火花"）等离子烧结（SPS），在真空中以 50°C/min 的速度将粉末加热到 1200°C 以上的温度，从而烧结/合成重量百分比为 WC-（25、50 和 75）的 TiC。结果表明，添加 50 和 75 wt % TiC 的纳米粉末的合成效率最高。结果表明，联合使用等离子体化学合成纳米粉体和 SPS 可以获得细粒样品（晶粒尺寸小于 1 μm），其密度增加，机械性能令人满意（维氏硬度为 17-18 GPa，最小帕姆奎斯特抗裂系数为 ~3 MPa m1/2）。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.