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(Ta,W)C bulks were prepared by spark plasma sintering. Densification kinetics and solid-solution formation kinetics were performed on the powder mixtures using TaC and W powders. The as-received tungsten powder had a spherical shape and rather coarse size. By using the crushed and as-received powder, it can be suggested that sintering at 2000°C limits the reaction volume to 3–6 μm and hence allows forming a complete solid-solution using finer powders. The lattice parameter, hardness, toughness, and strength were investigated as a function of the TaC content. The flexural strength of the (Ta,W)C ceramic bulks was investigated up to 2000°C and it was found that the maximum strength was for the 60 mol.% TaC composition. Strength as a function of the temperature tended to increase up to 1200°C followed by a gradual decrease to 2000°C. When the TaC was reinformed by coarse W spheres, the flexural strength monotonically decreased from 570 MPa at room temperature to 220 MPa at 2000°C.

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  This is the peer reviewed version of the following article: Preparation of high‐strength (Ta,W)C solid‐solutions by spark plasma sintering, which has been published in final form at https://doi.org/10.1111/ijac.14438. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

Keyword: composites, carbides, hardness, strength

Date published: 2023-05-25

Publisher: Wiley

Journal:

• International Journal of Applied Ceramic Technology (ISSN: 1546542X) vol. 20 issue. 5 p. 2747-2759

Funding:

• NIMS PA3030 (粉体・セラミックス 結晶・界面の階層的構造制御による機能顕在化のための研究 50)
• NIMS AB3080 (多結晶光学材料 Research toward Innovative Optical Materials 50)

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4957

First published URL: https://doi.org/10.1111/ijac.14438

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Updated at: 2024-11-14 16:30:55 +0900

Published on MDR: 2024-11-14 16:30:55 +0900