Zirconium alloyed tungsten borides synthesized by spark plasma sintering

• Autorzy: Grabiec Dariusz , Wiśniewska Maria , Psiuk Rafał , Denis Piotr , Levintant-Zayonts Neonila , Leshchynsky Volf , Rubach Rafał , Mościcki Tomasz

Identyfikatory

DOI

10.1007/s43452-021-00188-5

• Języki publikacji: EN

Abstrakty

EN

Tungsten borides (WBx; x = 2.5 or 4.5) with an increasing substitution of tungsten by zirconium from 0 to 24 at.% were synthesized by spark plasma sintering (SPS) for the first time. The influence of the holding time (2.5–30 min) on the densification behavior, microstructure evolution and development of the properties of W–Zr–B compounds were studied. The samples were characterized using scanning electron microscopy (SEM) for microstructure analysis, X-ray diffraction (XRD) for phase identification, Vickers micro-indentation for microhardness measurements, tribological tests to determine the coefficient of friction and specific wear rate, as well as measurements of electrical conductivity. The XRD results confirm the presence of the WB4 phase in the microstructure, despite the high sintering temperature (1800 °C) and small overstoichiometric excess of boron (4.5) addition in the sintered samples. This is caused by the high heating rate (400 °C/min), short holding time (2.5 min) and addition of zirconium. The Vickers hardness (HV) values measured at 1 N are 24.8 ± 2.0 and 26.6 ± 1.8 GPa for 24 at.% zirconium in WB2.5 and for 0 at.% zirconium in WB4.5, respectively. In addition, the hardest sample (W0.76Zr0.24B2.5) showed electrical conductivity up to 3.961·106 S/m, which is similar to WC–Co cemented carbides. The friction and wear test results reveal the formation of a boron-based film which seems to play the role of a solid lubricant.

Słowa kluczowe

EN

sintering; microstructure; friction; lubrication

PL

spiekanie; mikrostruktura; tarcie; smarowanie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2021
• Tom: Vol. 21, no. 1
• Strony: 617--631
• Opis fizyczny: Bibliogr. 26 poz., rys., wykr.

Twórcy

autor

Grabiec Dariusz

• Łukasiewicz Research Network – Metal Forming Institute, 14 Jana Pawla II St, 61-139 Poznan, Poland

• https://orcid.org/0000-003-1114-6323

autor

Wiśniewska Maria

• Łukasiewicz Research Network – Metal Forming Institute, 14 Jana Pawla II St, 61-139 Poznan, Poland

• https://orcid.org/0000-0002-5292-2926

autor

Psiuk Rafał

• Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawinskiego St, 02-106 Warsaw, Poland

• https://orcid.org/0000-0003-4275-0726

autor

Denis Piotr

• Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawinskiego St, 02-106 Warsaw, Poland

• https://orcid.org/0000-0002-1105-3381

autor

Levintant-Zayonts Neonila

• Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawinskiego St, 02-106 Warsaw, Poland

• https://orcid.org/0000-0002-4826-1731

autor

Leshchynsky Volf

• Łukasiewicz Research Network – Metal Forming Institute, 14 Jana Pawla II St, 61-139 Poznan, Poland

• https://orcid.org/0000-0003-3807-0701

autor

Rubach Rafał

• Łukasiewicz Research Network – Metal Forming Institute, 14 Jana Pawla II St, 61-139 Poznan, Poland

• https://orcid.org/0000-0002-8620-2855

autor

Mościcki Tomasz

• Institute of Fundamental Technological Research Polish Academy of Sciences, 5B Pawinskiego St, 02-106 Warsaw, Poland

• https://orcid.org/0000-0002-8407-903X

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)