Energy-effective AlMgB14 production by self-propagating high-temperature synthesis (SHS) using the chemical furnace as a source of heat energy

Nikitin, Pavel; Matveev, Alexey; Zhukov, Ilya

doi:10.1016/j.ceramint.2021.04.183

Cited by 17 publications

(14 citation statements)

References 14 publications

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“…It is also important to note that in addition to the AlB 12 phase, the Al 0.5 Mg 0.5 B 2 phase is formed in the obtained specimens. In [ 11 , 17 , 23 ], it was found that the Al 0.5 Mg 0.5 B 2 diboride phase is an intermediate phase in the formation of aluminum magnesium boride AlMgB 14 . However, the presence of an inert diluent (silicon) absorbs part of the heat energy and prevents the formation of the AlMgB 14 phase under the selected sintering mode, despite the completion of the specimen consolidation process.…”

Section: Resultsmentioning

confidence: 99%

“…The samples were found to have a friction coefficient below 0.2 when sliding against Si 3 N 4 , Al 2 O 3 , and SiC. In the last two decades, polycrystalline materials based on AlMgB 14 have been actively studied [ 9 , 10 , 11 ]. AlMgB 14 is also based on B 12 icosahedrons forming an orthorhombic structure, has high hardness (up to 32 GPa), and a low friction coefficient (COF, 0.08–0.02).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

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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“…This leads to an increase in the combustion temperature of SHS powders. As the literature analysis shows, the optimum sintering temperature for AlMgB 14 is 1400 • C [1, 4,18]. In [8], the decomposition mechanism of AlMgB 14 in the SPS process at temperatures above 1400 • C was investigated.…”

Section: Shs Powdersmentioning

confidence: 99%

On the Structure and Properties of AlMgB14-TiB2 Composites Obtained from SHS Powders by Spark Plasma Sintering

et al. 2021

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AlMgB14-TiB2 composite materials were fabricated by self-propagating high-temperature synthesis (SHS) followed by spark plasma sintering of the obtained SHS products. It was found that, during the SHS, the AlMgB14 phase is formed at a donor (Ti + 2B) to acceptor (Al12Mg17-B) mass ratio of 3:7 and 4:6, respectively. The specimen sintered from the SHS powder with the donor:acceptor mass ratio of 5:5 at a temperature of 1470 °C has a uniform skeletal structure. The average hardness of the obtained specimen is 30.1 GPa.

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“…The structure was formed in the course of in situ synthesis supported by exothermic reactions between the initial mixture components. It should be noted that the SH synthesis process is supported by the heat produced by these reactions, thus making it possible to obtain powder materials without external energy input [ 14 , 15 , 16 , 17 ]. One of the main disadvantages of the SHS method is high porosity of synthesized materials [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Structure, Properties and Phase Composition of Composite Materials Based on the System NiTi-TiB2

et al. 2022

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This article considers issues pertinent to the research of the phase composition, structure and mechanical properties of materials obtained from powders of composite (Ni-Ti)-TiB2, which have prospective applications in aerospace and automotive industry and engine construction. The starting powder materials (Ni-Ti)-TiB2 were obtained by self-propagating high-temperature synthesis (SHS). Research samples were produced using high-temperature vacuum sintering. It was shown that the use of such materials increases the wettability of the particles and allows the production of composites, the density of which is 95% of the theoretical one. Average particle size was 1.54 µm, average microhardness was 8 GPa, which is an order of magnitude higher than the average microhardness of pure nickel-based and titanium-based alloys, and the ultimate strength values were comparable to those of tungsten-based heavy alloys.

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Energy-effective AlMgB14 production by self-propagating high-temperature synthesis (SHS) using the chemical furnace as a source of heat energy

Cited by 17 publications

References 14 publications

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

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

On the Structure and Properties of AlMgB14-TiB2 Composites Obtained from SHS Powders by Spark Plasma Sintering

Structure, Properties and Phase Composition of Composite Materials Based on the System NiTi-TiB2

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