PSI - Issue 40

Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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Procedia Structural Integrity 40 (2022) 136–144

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics of Materials and Structures. Abstract In this study, the hardmetal powder (WC-Co(8%)), consisting of refractory tungsten carbide (WC) and cobalt (Co) powders (8%), is investigated in order to determine its phase transitions under conditions close to traditional solid-phase sintering at 1450 ○ C. Quantitative composition of the WC-Co(8%), WC, Co powders was performed using X-ray microanalysis. The powder's phase analysis and thermal analysis were conducted using X-ray diffraction and thermogravimetric thermal analysis (TGA)/differential thermal analysis (DTA). Thermal analysis was carried out in an inert argon atmosphere on corundum and platinum-rhodium crucibles with a heating rate of 10 ○ C / min. It was found that WC-Co (8%) consists of WC as the primary phase, W2C and α, β - phases of Co as impurities. The thermal analysis revealed an exothermic peak within 250-850 ○ C with an increasing mass curve. So, thermal and phase analysis of WC-Co (8%), WC-WC and Co powders after heated to 1450 ○ C makes it possible to establish that Co reacts with crucibles during heated WC-Co (8%) powder made of Al 2 O and PtRh alloys. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Keywords: Hardmetal powder, WC-Co(8%), X-ray diffraction, thermal analysis, phase transformation, endothermic process, exothermic process. Phase transitions during solid-phase sintering of WC-Co(8%) Fedorov M. V. *, Prokopyev L. A., Andreev Ya. M., Andreev A. S., Semenov S. O., Yakovlev Yu. A. Federal Research Centre “The Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciences”, 2, Petrovsko go str., Yakutsk 677000, Russia Abstract In this study, the hardmetal powder (WC-Co(8%)), consisting of refractory tungsten carbide (WC) and cobalt (Co) powders (8%), i inves igated in order to etermine its phase tran itions under c ndi ions close to traditional solid-phase sintering at 1450 ○ C. Quantit tive c mposition of the WC-Co(8%), WC, Co powders was performed us ng X-ray microanalysis. The powder's phase analysis and thermal analysis were conducted using X-ray diffraction and thermo ravimetric thermal analysis (TGA)/differenti l therm l analysis (DTA). Thermal a alysis was carried out in an inert argon atmosph re on corundum and platinum-rhodium crucibles with a heating rate of 10 ○ C / min. It w s found hat WC-Co (8%) consi ts of WC as the prim ry hase, W2C and α, β - pha es of Co as mpurities. The ther al analysis revealed an exothermic peak within 250-850 ○ C w th an increasing m ss curve. So, thermal and phase analysis of WC-Co (8%), WC-WC d C powders fter heated to 1450 ○ C makes t possible to e tablish that Co eacts with crucibles during heated WC-Co (8%) pow er made of Al 2 O and P Rh alloys. © 2022 The Au hor . Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der re ponsibility of scientific committe of the15th Int rnational C nference o Mechanics, Resource and Diagnostics of Materials and S ructur s. Keywords: Hardmetal powder, WC-Co(8%), X-ray diffraction, thermal analysis, phase transformation, endothermic process, exothermic process. 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures Phase transitions during solid-phase sintering of WC-Co(8%) Fedorov M. V. *, Prokopyev L. A., Andreev Ya. M., Andreev A. S., Semenov S. O., Yakovlev Yu. A. Federal Research Centre “The Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciences”, 2, Petrovsko go str., Yakutsk 677000, Russia 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Stru tures

* Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: fedorov.83@mail.ru * Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail ad ress: fed ov.83@mail.ru

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der re ponsibility of scientific committe of the15th Int rnational C ference o Mechanics, Resource and Diagnostics of Mate ials and Structures.

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics

of Materials and Structures. 10.1016/j.prostr.2022.04.018