Synthesis, sintering, structure and properties of AlB12C2 - based materials

T. A. Prikhna, Richard Haber, P. P. Barvitskiy, V. B. Sverdun, S. N. Dub, V. B. Muratov, V. Domnich, M. V. Karpets, V. E. Moshchil, M. G. Loshak, V. V. Kovylaev, O. O. Vasiliev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper presents the results of the study on sintering of the AlB12C2 submicron powder and synthesis of AlB12C2-based ceramics from the submicron α-AlB12 powder with C and TiC additions by hot pressing at 30 MPa. The material sintered at 1950°C from AlB12C2 which contained about 100% of AlB12C2 according to the X-ray analysis, demonstrated the density p=2.57 g/cm3, fracture toughness K1c(49 N)=3.4 MPa·m0.5, hardness Hv(49N)=27.9 GPa, bending strength Rbs=311 MPa and compression strength Rcs=1461 MPa; while the SEM study showed that the material consisted of two phases with approximate stoichiometrics: Ala15B11C2 (matrix phase) and Al2O3.5B1.1 (inclusions). The material synthesized at 1950°C from α-AlB12 with 20% TiC contained 74% AlB12C2, 22% TiB2, 4% Al2O3 according to the X-ray analysis and showed Hv(49N)=28.9 GPa, K1c(49 N)=5.2 MPa·m0.3, Rbs=633 MPa and Rcs=640 MPa, but its density was higher, p=3.2 g/cm3. Additions of 17% C to the α-AlB12 powder lead to 86% AlB12C2 and 14% A1N composition with p=2.7 g/cm3, K1c(49 N) = 5.9 MPa·m0.5, Rcs, = 423 MPa. Rbs=310 MPa. Materials sintered for comparison from α-AIlB12 at 30 MPa, 2O8O-1950°C turned out to be 94-98% α-AlB12 (p=2.58 g/cm3) and demonstrated Hv(49N)=24.1 GPa, K1c(49 N)=4.9 MPa·m0.5, Rbs=336 MPa and Rcs=378 MPa.

Original languageEnglish (US)
Title of host publicationCeramic Engineering and Science Proceedings
EditorsJonathan Salem, Jerry C. LaSalvia, Roger Narayan, Dongming Zhu
PublisherAmerican Ceramic Society
Pages195-204
Number of pages10
Edition2
ISBN (Print)9781119040439
DOIs
Publication statusPublished - Jan 1 2018
Event41st International Conference on Advanced Ceramics and Composites, ICACC 2017 - Daytona Beach, United States
Duration: Jan 22 2017Jan 27 2017

Publication series

NameCeramic Engineering and Science Proceedings
Number2
Volume38
ISSN (Print)0196-6219

Other

Other41st International Conference on Advanced Ceramics and Composites, ICACC 2017
CountryUnited States
CityDaytona Beach
Period1/22/171/27/17

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Prikhna, T. A., Haber, R., Barvitskiy, P. P., Sverdun, V. B., Dub, S. N., Muratov, V. B., ... Vasiliev, O. O. (2018). Synthesis, sintering, structure and properties of AlB12C2 - based materials. In J. Salem, J. C. LaSalvia, R. Narayan, & D. Zhu (Eds.), Ceramic Engineering and Science Proceedings (2 ed., pp. 195-204). (Ceramic Engineering and Science Proceedings; Vol. 38, No. 2). American Ceramic Society. https://doi.org/10.1002/9781119474678.ch19