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- Title
Structure and properties of superhard materials based on aluminum dodecaboride α-AlB.
- Authors
Prikhna, T.; Barvitskyi, P.; Karpets, M.; Muratov, V.; Sverdun, V.; Khaber, P.; Kartuzov, V.; Moshchil', V.; Dub, S.; Loshak, M.; Aleksandrova, L.; Kovylyaev, V.; Garbuz, V.; Marchenko, A.
- Abstract
The structures and mechanical properties of materials based on α-AlB12 without additives and with additions of carbon and titanium carbide sintered under high (2 GPa) pressure and by hot pressing (30 MPa) in the contact with hexagonal BN. The light materials were obtained having high hardness, fracture toughness, ultimate strengths at bending, R , and compression. The addition of 17 wt % C to α-AlB and sintering at 30 MPa makes possible to achieve fracture toughness K (49 N) = 5.9 ± 1.4 MPa·m, hardness H (49 N) = 23.6 ± 2.8 GPa, bending R = 310 MPa and compression R = 423 MPa strengths and specific weight was γ = 2.7 g/cm. The addition of 20 wt % TiC to α-AlB and sintering at 30 MPa resulted in the formation of AlB1C and TiB, increase of the hardness H (49 N) = 28.9 ± 1.9 GPa, R = 633 MPa, R = 640 MPa and γ = 3.2 g/cm, the K (49 N) = 5.2 ± 1.5 MPa·m.
- Publication
Journal of Superhard Materials, 2017, Vol 39, Issue 5, p299
- ISSN
1063-4576
- Publication type
Article
- DOI
10.3103/S106345761705001X