Lightweight ceramics based on aluminum dodecaboride, boron carbide and self-bonded silicon carbide

Prikhna, T. A.; Barvitskyi, P. P.; Maznaya, A. V.; Муратов, В. Б.; Devin, L. N.; Neshpor, A. V.; Domnich, Vladislav; Haber, Richard A.; Karpets, M. V.; Samus, E. V.; Дуб, С. Н.; Moshchil, Viktor

doi:10.1016/j.ceramint.2018.10.065

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…This issue is often mentioned in the literature (e.g. 2,9 ) and it needs further study. The reason is, on the one hand, the small dimensionality of the observed phases vs. the larger electron spot size in EDS, and, on the other hand, the fundamental uncertainties related to the structure and stoichiometry of the Al-BC phases make difficult a deep analysis of the experimental data and caution is necessary to avoid misleading conclusions.…”

Section: Resultsmentioning

confidence: 98%

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

Vasylkiv

Borodianska

Demirskyi

et al. 2019

Sci Rep

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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.

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Section: Resultsmentioning

confidence: 98%

“…Limited information is available on the assessment of the impact properties of the mentioned Al-containing phases in the Al-B-C system. To the best of author’s knowledge there are only a few articles on this topic 7–9 . Reference 7 considers α-AlB 12 for armor in aircraft protection, while in ref.…”

Section: Introductionmentioning

confidence: 99%

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

Vasylkiv

Borodianska

Demirskyi

et al. 2019

Sci Rep

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“…SiC is an artificial compound that is composed of commercial silica sand and carbon [ 17 ]. It supplies the best combination of heat resistance, low density, and light weight with low friability, and it maintains its strength at high temperatures up to 1500 °C [ 18 , 19 ]. Its superior mechanical properties make it ideal for utilization in engineering applications [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

A Review on Surface Finishing Techniques for Difficult-to-Machine Ceramics by Non-Conventional Finishing Processes

et al. 2022

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Ceramics are advanced engineering materials in which have been broadly used in numerous industries due to their superior mechanical and physical properties. For application, the industries require that the ceramic products have high-quality surface finishes, high dimensional accuracy, and clean surfaces to prevent and minimize thermal contact, adhesion, friction, and wear. Ceramics have been classified as difficult-to-machine materials owing to their high hardness, and brittleness. Thus, it is extremely difficult to process them with conventional finishing processes. In this review, trends in the development of non-conventional finishing processes for the surface finishing of difficult-to-machine ceramics are discussed and compared to better comprehend the key finishing capabilities and limitations of each process on improvements in terms of surface roughness. In addition, the future direction of non-conventional finishing processes is introduced. This review will be helpful to many researchers and academicians for carrying out additional research related to the surface finishing techniques of ceramics for applications in various fields.

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“…Higher borides belong to the group of compounds based on B 12 icosahedrons. The main compounds based on B 12 icosahedrons are AlB 12 , B 12 C 3 (B 4 C), B 12 Si 3 , B 12 Si 2 (B 4 Si and B 6 Si), and B 12 O 2 (B 6 O) [ 3 , 4 , 5 , 6 , 7 , 8 ]. These compounds exhibit excellent properties at relatively low densities, have extremely high melting points due to the strong bonds of intra- and interclusters B 12 [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Phase Composition, Structure and Properties of the Spark Plasma Sintered Ceramics Obtained from the Al12Mg17-B-Si Powder Mixtures

Nikitin¹,

Zhukov²,

Matveev³

et al. 2022

Nanomaterials

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In this work, composite materials were obtained by spark plasma sintering of an Al12Mg17-B-Si powder mixture. The structure, phase composition, and mechanical properties of the obtained composites were studied. It was found that various compounds based on B12 icosahedrons, such as AlB12, B4Si, and B6Si, are formed during spark plasma sintering. Based on the SEM images and results of XRD analysis of the obtained specimens, a probable scheme for the formation of the phase composition of composite materials during spark plasma sintering was proposed. An increase in the Al12Mg17-B powder content in the initial mixture from 30 to 70 wt% leads to an increase in hardness from 16.55 to 21.24 GPa and a decrease in the friction coefficient and wear rate from 0.56 to 0.32 and 13.60 to 5.60 10−5 mm−3/(N/m), respectively.

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Lightweight ceramics based on aluminum dodecaboride, boron carbide and self-bonded silicon carbide

Cited by 15 publications

References 8 publications

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

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

A Review on Surface Finishing Techniques for Difficult-to-Machine Ceramics by Non-Conventional Finishing Processes

Phase Composition, Structure and Properties of the Spark Plasma Sintered Ceramics Obtained from the Al12Mg17-B-Si Powder Mixtures

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