AlMgB14–TiB2 composite materials obtained by self-propagating high-temperature synthesis and spark plasma sintering

Nikitin, Pavel; Zhukov, Ilya; Matveev, Alexey; Соколов, С. Д.; Болдин, М. С.; Vorozhtsov, Alexander

doi:10.1016/j.ceramint.2020.06.039

Cited by 22 publications

(23 citation statements)

References 15 publications

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“…To ignite the samples, a current was applied to the molybdenum spiral in contact with the upper part of the samples. An intermediate (Ti + B) ignition layer was used for the uniform distribution of heat throughout the sample volume [ 15 ].…”

Section: Methodsmentioning

confidence: 99%

“…The above raises the question of the possibility of intensifying the reaction in an Al-Mg-B powder mixture, controlling the structure, and achieving homogeneity of AlMgB 14 with various additives. In this regard, in our previous work [ 15 ], we proposed a method for obtaining AlMgB 14 -TiB 2 composites using the technology of self-propagating high-temperature synthesis (SHS). This method is based on the exothermic reaction of titanium and boron with the formation of titanium diboride (donor), which is accompanied by the release of a large amount of heat.…”

Section: Introductionmentioning

confidence: 99%

“…The (Ti + 2B) reaction is a heat source for the endothermic reaction of AlMgB 14 formation in the Al 12 Mg 17 -B acceptor system. In our previous work, the donor:acceptor ((Ti + 2B):Al 12 Mg 17 -B) mass ratio was 3:7 [ 15 ]. The novelty of the proposed technology is as follows.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…The thermochemical coupling approach was used to deliver AlMgB 14 -TiB 2 composite materials by self-propagating high-temperature synthesis for subsequent SPS compaction at 1470 °C for a duration of 5 min [ 38 ]. Ti (OJSC Polema), (purity 99.2%, average particle size 140 μm), Al 12 Mg 17 (Original powder) (purity 99.2%, average particle size 20 μm) and boron (OJSC Aviabor), (purity 98.8%, average particle size 0.6 μm) were used as precursors in combustion experiments to prepare AlMgB 14 -TiB 2 composite materials.…”

Section: The Role Of Coupling On the Synthesis And Sintering Of Shs Powdersmentioning

confidence: 99%

“… SEM images of SHS powder ( a ) and dense samples sintered by SPS at 1450 °C ( b ). Reprinted from Nikitin et al, 2020 with copyright permission, Ceramics International [ 38 ]. …”

Section: Figurementioning

confidence: 99%

SHS-Derived Powders by Reactions’ Coupling as Primary Products for Subsequent Consolidation

2021

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The capability of self-propagating high-temperature synthesis (SHS) to produce powders that are characterized by a high sintering ability, owing to high heating and cooling rates inherent to the exothermic reaction, is of a special interest for the industry. In particular, SHS-derived powders comprise a significant defect concentration in order to effectively enhance the mass transfer processes during the sintering, which allows for the successful consolidation of difficult-to-sinter materials at relatively low sintering temperatures. From this perspective, the design of precursors suitable for sintering, synthesis in a controlled temperature regime and the optimization of geometrical and structural parameters of SHS powders as a potential feedstock for the consolidation is of key importance. Here, we report on the comparative studies concerning the SHS processing of composites for advanced powder metallurgy techniques. The synthesis and sintering peculiarities of the SHS through coupled reactions in the Me’O3(WO3,MoO3)-Me’’O(CuO,NiO)-Mg-C, Ti-B-Al12Mg17 systems are comparatively reviewed. The SHS coupling approach was used for the preparation of powders with a tuned degree of fineness (a high specific surface area of particles), a high-homogeneity and a controllable distribution of elements via both the regulation of the thermal regime of combustion in a wide range and the matching of the thermal and kinetic requirements of two interconnected reactions. Microstructural features of the powder feedstock greatly contributed to the subsequent consolidation process.

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Characterization of Ultra-Hard Ceramic AlMgB14-based Materials Obtained by Self-propagating High-Temperature Synthesis and Spark Plasma Sintering

Zhukov

Nikitin

Vorozhtsov

2021

Characterization of Minerals, Metals, and Materials 2021

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AlMgB14–TiB2 composite materials obtained by self-propagating high-temperature synthesis and spark plasma sintering

Cited by 22 publications

References 15 publications

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

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

SHS-Derived Powders by Reactions’ Coupling as Primary Products for Subsequent Consolidation

Characterization of Ultra-Hard Ceramic AlMgB14-based Materials Obtained by Self-propagating High-Temperature Synthesis and Spark Plasma Sintering

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