2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 18 Intl. Symp on Advanced Materials, Polymers, Composite, Nanomaterials, Nanotechnologies and Manufacturing
| Editors: | F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, M. De Campos, S. Lewis, S. Miller, S. Thomas. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 290 pages |
| ISBN: | 978-1-989820-68-1(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Structure and mechanical characteristics of high pressure sintered ZrB2, HfB2 and ZrB2- TiB2, ZrB2-SiC composite materials.
Tetiana Prikhna1; Anastasia Lokatkina2; Viktor Moshchil3; Pavlo Barvitskiy3; Olexandr Borymskyi4; Florian Kongoli5; Fernand Marquis6;1V. BAKUL INSTITUTE NASU, Kiev, Ukraine; 2INSTITUTE FOR SUPERHARD MATERIALS OF THE NATIONAL ACADEMY OF SCIENCES OF UKRAINE, Kyiv, Ukraine; 3INSTITUTE FOR SUPERHARD MATERIALS, Kiev, Ukraine; 4V. BAKUL INSTITUTE FOR SUPERHARD MATERIALS OF THE NATIONAL ACADEMY OF SCIENCES OF UKRAINE, Kyiv, Ukraine; 5FLOGEN TECHNOLOGIES, Mont-Royal, Canada; 6SAN DIEGO STATE UNIVERSITY, San Diego, United States;
Type of Paper: Regular
Id Paper: 286
Topic: 43
Abstract:
The ZrB2 and HfB2 materials are promising for application in hypersonic aerospace, cutting tools, metallurgy, microelectronics and refractory industries. The structure and properties of sintered under high pressure (4GPa) - high temperature (1800 oC) or HP-HT conditions ZrB2, HfB2, ZrB2+30%TiB2 and ZrB2-20% SiC refractory materials are under consideration. HP-HT sintered HfB2 (a=0.3141, c=0.3473 nm γ=10.42 g/cm3) demonstrated hardness HV(9.8 N)=21.27±0.84 GPa, HV(49 N)=19.29±1.34 GPa, and HV(98 N)=19.17±0.5 GPa and fracture toughness K1C(9.8 N)=6.47 MN×m0.5. High pressure sintered ZrB2 (a=0.3167 , c=0.3528 nm, γ=6.1 g/cm3) demonstrated HV(9.8N)= 17.66±0.60 GPa, HV(49 N)= 15.25±1.22 GPa, and HV(98 N)= 15.32±0.36 GPa and K1C(9.8 N)=3.64 MN×m0.5. Addition of 30 wt.% of TiB2 to ZrB2 did not allow to increase hardness of the material essentially (HV(9.8 N)=17.75±2.36 GPa, γ=5.29 g/cm3 ). Addition of 20 wt.% of SiC to ZrB2 and sintering under high pressure allowed essential increase of hardness to HV(9.8 N)=24.18±0.7 GPa, HV(49 N)=16.68±0.5 GPa, and HV(98 N)=17.59±0.4 GPa and fracture toughness (K1C(9.8 N)=6.49 ± 0.25 MN×m0.5, K1C(49 N)=7.06± 1.55 MN×m0.5 , K1C(98 N)=6.18± 1.24 MN×m0.5) of composite ZrB2- SiC material (γ=5.03 g/cm3).