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

• DOI: 10.1016/j.ceramint.2020.06.039
• Publication Date: 2020-06-09T16:23:20Z
• Authors: P.Yu. Nikitin; I.A. Zhukov; A.E. Matveev; S.D. Sokolov; M.S. Boldin; A.B. Vorozhtsov
• Keywords: Spark Plasma Sintering; Self-propagating high-temperature synthesis; Vickers hardness test

Abstract In this work, AlMgB14–TiB2 composite materials were obtained by thermochemical-coupled self-propagating high-temperature synthesis (SHS) and subsequent spark plasma sintering. The mechanism was proposed for the formation of the composite materials in the thermochemical-coupled SHS mode. The phase composition, microstructure, and properties (density and Vickers hardness) of the dense AlMgB14–TiB2 materials were investigated. At a sintering temperature of 1470 °C, AlMgB14 is decomposed into AlB12 and Mg. The sample sintered at 1470 °C with a holding time of 5 min had a maximum average hardness of 32.1 GPa.