Influence of heating to high temperatures on mechanical properties of boride-based refractory materials

Authors

DOI:

https://doi.org/10.15587/2706-5448.2021.228943

Keywords:

zirconium diboride, hafnium diboride, silicon carbide, silicon nitride, ultrahigh-temperature ceramics, refractory borides

Abstract

The object of research is HfB2, ZrB2 and ceramics composition HfB2-30 % SiC and ZrB2-20 % SiC, ZrB2-20 % SiC-4 % Si3N4 obtained under high pressure, their mechanical characteristics before and after heating to high temperatures and temperatures of beginning of melting. The research was conducted in order to create new effective refractory materials for use in the aerospace industry. Therefore, the melting temperatures of sintered materials and the effect of heating on their mechanical properties were also studied. Additives (ZrB2-20 % SiC and HfB2-30 % SiC) although led to a decrease in specific gravity. But increased hardness (by 17 % and 46 % in the case of ZrB2 and HfB2, respectively) and fracture toughness (by 40 % and 21 % in the case of ZrB2 and HfB2, respectively). However, significantly reduced the onset of melting temperature in vacuum to 2150–2160 °C.

Materials sintered from ZrB2 and HfB2 was not melted after heating to 2970 °C. After heating to a melting point of 2150–2160 °C (in the case of materials with additives) and to temperatures of 2970 °C (in the case of materials sintered with ZrB2 or HfB2), the hardness and fracture toughness decreased. Thus, the hardness of the material prepared from ZrB2 decreased by 19 % and its fracture toughness – by 18 %, and of that prepared from ZrB2–20 % SiC – by 46 % and 32 %, respectively. The hardness of the material prepared from HfB2 decreased by 46 %, its fracture toughness – by 55 %, and of that prepared from HfB2-30 % SiC, after heating decreased by 40 %, but its fracture toughness increased by 15 %. The sintered HfB2 (with a density of 10.4 g/cm3) before heating showed a hardness of HV(9.8 N)=21.27±0.84 GPa, HV(49 N)=19.29±1.34 and HV(98 N)=19.17±0.5, and fracture toughness K1C(9.8 N)=0.47 MH·m0.5, and ZrB2 with a density of 6.2 g/cm3 was characterized by HV(9.8 N)=17.66±0.60 GPa, HV(49 N)=15.25±1.22 GPa and HV(98 N)=15.32±0.36 GPa, K1C(9.8 N)=4.3 MH·m0.5. Material sintered with HfB2-30 % SiC (density 6.21 g/cm3) had Hv(9.8 N)=38.1±1.4 GPa, HV(49 N)=27.7±2.8 GPa, and K1C(9.8 N)=8.1 MH·m0.5, K1C(49 H)=6.8 MH·m0.5. The sintered with ZrB2-20 % SiC material had density of 5.04 g/cm3, HV(9.8 N)=24.2±1.9 GPa, HV(49 N)=16.7±2.8 GPa, K1C(49 H)=7.1 MH·m0.5. The SiC addition to the initial mixture significantly reduces the elasticity of the materials.

Author Biographies

Anastasiia Lokatkina, V. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine

Postgraduate Student

Department of High-Pressure Technologies, Functional Ceramic Composites and Disperse Superhard Materials

Tetiana Prikhna, V. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine

Doctor of Technical Science, Professor, Head of Department, Corresponding Member of National Academy of Sciences of Ukraine

Department of High-Pressure Technologies, Functional Ceramic Composites and Disperse Superhard Materials

Viktor Moshchil, V. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine

Senior Researcher

Department of High-Pressure Technologies, Functional Ceramic Composites and Disperse Superhard Materials

Pavlo Barvitskyi, V. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine

Junior Research

Department of High-Pressure Technologies, Functional Ceramic Composites and Disperse Superhard Materials

Oleksandr Borimsky, V. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine

Leading Researcher

Department of High-Pressure Technologies, Functional Ceramic Composites and Disperse Superhard Materials

Leonid Devin, V. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine

Leading Researcher

Department of Physical and Mechanical Research and Nanotesting of Materials

Semyon Ponomaryov, V. E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine

Junior Researcher

Department of Optics and Spectroscopy for Electrical and Electrical Materials

Richard Haber, Rutgers, The State University of New Jersey

Professor, Co-Director

Ceramic, Composite and Optical Materials Center

Department of Materials Science and Engineering

Tatiana Talako, State Scientific Institution «Powder Metallurgy Institute»

Leading Researcher

Anatoly Bondar, Institute for Problems of Materials Sciences of National Academy of Sciences of Ukraine

Senior Researcher

Department No. 6 of Physical Chemistry of Inorganic Materials

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Published

2021-04-30

How to Cite

Lokatkina, A., Prikhna, T., Moshchil, V., Barvitskyi, P., Borimsky, O., Devin, L., Ponomaryov, S., Haber, R., Talako, T., & Bondar, A. (2021). Influence of heating to high temperatures on mechanical properties of boride-based refractory materials. Technology Audit and Production Reserves, 2(1(58), 21–25. https://doi.org/10.15587/2706-5448.2021.228943

Issue

Vol. 2 No. 1(58) (2021): Industrial and technology systems

Section

Materials Science: Reports on Research Projects

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Copyright (c) 2021 Анастасія Станіславівна Локаткіна, Тетяна Олексіївна Пріхна, Віктор Євгенович Мощіль, Павло Петрович Барвіцький, Олександр Іванович Боримський, Леонід Миколайович Девін, Семен Семенович Пономарьов, Richard Haber, Тетяна Леонідівна Талако, Анатолій Адольфович Бондар

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