Bulks of Al-B-C obtained by reactively spark plasma sintering and impact properties by Split Hopkinson Pressure Bar

O. Vasylkiv, H. Borodianska, D. Demirskyi, P. Li, T. S. Suzuki, M. A. Grigoroscuta, I. Pasuk, A. Kuncser, P. Badica

研究成果: Article

抜粋

Mixtures of B4C, α-AlB12 and B powders were reactively spark plasma sintered at 1800 °C. Crystalline and amorphous boron powders were used. Samples were tested for their impact behavior by the Split Hopkinson Pressure Bar method. When the ratio R = B4C/α-AlB12 ≥ 1.3 for a constant B-amount, the major phase in the samples was the orthorhombic AlB24C4, and when R < 1 the amount of AlB24C4 significantly decreased. Predictions that AlB24C4 has the best mechanical impact properties since it is the most compact and close to the ideal cubic packing among the Al-B-C phases containing B12-type icosahedra were partially confirmed. Namely, the highest values of the Vickers hardness (32.4 GPa), dynamic strength (1323 MPa), strain and toughness were determined for the samples with R = 1.3, i.e., for the samples with a high amount of AlB24C4. However, the existence of a maximum, detectable especially in the dynamic strength vs. R, indicated the additional influence of the phases and the composite’s microstructure in the samples. The type of boron does not influence the dependencies of the indicated mechanical parameters with R, but the curves are shifted to slightly higher values for the samples in which amorphous boron was used.

元の言語English
記事番号19484
ジャーナルScientific reports
9
発行部数1
DOI
出版物ステータスPublished - 2019 12 1

ASJC Scopus subject areas

  • General

フィンガープリント Bulks of Al-B-C obtained by reactively spark plasma sintering and impact properties by Split Hopkinson Pressure Bar' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Vasylkiv, O., Borodianska, H., Demirskyi, D., Li, P., Suzuki, T. S., Grigoroscuta, M. A., Pasuk, I., Kuncser, A., & Badica, P. (2019). Bulks of Al-B-C obtained by reactively spark plasma sintering and impact properties by Split Hopkinson Pressure Bar. Scientific reports, 9(1), [19484]. https://doi.org/10.1038/s41598-019-55888-z