Spark plasma sintering, phase composition, and properties of AlMgB14 ceramic materials P. Yu. Nikitin, I. A. Zhukov, M. S. Boldin [et al.]
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ArticleContent type: Текст Media type: электронный Subject(s): бориды | керамические материалы | шпинель | электроискровое плазменное спекание | фазовый составGenre/Form: статьи в журналах Online resources: Click here to access online
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Russian journal of inorganic chemistry Vol. 66, № 8. P. 1252-1256Abstract: AlMgB14-based materials have been synthesized by spark plasma sintering of an Al12Mg17–B powder mixture at 1300 and 1400°C. The phase composition, structure, and properties of these materials have been studied. According to X-ray powder diffraction evidence, spark plasma sintering leads to the formation of the AlMgB14 phase and the MgAl2O4 spinel. The content of the AlMgB14 phase in the materials is ~95 wt %. At a sintering temperature of 1400°C, the resulting material has a hardness and relative density of 30.1 GPa and 99.3%, respectively. It has been demonstrated that a major source of oxygen in the powder mixture is a B2O3 oxide film on the boron powder surface. Thus, when the Al12Mg17 intermetallic powder is used as a precursor, the reaction of AlxMgy intermetallic compounds with B2O3 leads to the formation of the MgAl2O4 spinel.
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AlMgB14-based materials have been synthesized by spark plasma sintering of an Al12Mg17–B powder mixture at 1300 and 1400°C. The phase composition, structure, and properties of these materials have been studied. According to X-ray powder diffraction evidence, spark plasma sintering leads to the formation of the AlMgB14 phase and the MgAl2O4 spinel. The content of the AlMgB14 phase in the materials is ~95 wt %. At a sintering temperature of 1400°C, the resulting material has a hardness and relative density of 30.1 GPa and 99.3%, respectively. It has been demonstrated that a major source of oxygen in the powder mixture is a B2O3 oxide film on the boron powder surface. Thus, when the Al12Mg17 intermetallic powder is used as a precursor, the reaction of AlxMgy intermetallic compounds with B2O3 leads to the formation of the MgAl2O4 spinel.
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