Combustion synthesis of TiC-based ceramic-metal composites with high entropy alloy binder

Abstract

Ceramic-metal composites TiC-High-Entropy Alloy (HEA) CoCrFeNiMe (Me = Mn, Ti or Al) were first produced by combustion synthesis method. Self-sustained synthesis occurs due to heat release from exothermic reaction Ti + C = TiC; the binder content was varied between zero and 40-50 wt.%. The combustion velocity and temperature gradually decreased with increasing binder content. Resultant materials consist of TiC grains and two-phase (fcc and bcc) binder. Vickers microhardness (100 g) of compacted cermet materials with 30 wt.% of binder was in the range of 10-17 GPa and increased with increasing bcc to fcc ratio. Based on experimental results and thermodynamic calculations, the mechanism of microstructure formation in TiC-HEA cermets was suggested.

Formation of products upon ignition, combustion and melting of mixtures of high-entropy alloy FeNiCoCrCu with titanium and carbon

“…-WC-CoCrFeNiMn [10], -SiC-CoCrFeMnNi [11], -TiC-FeCrNiCoAlCu [12; 13], -TiC-FeMnCrNiCo [14], -TiCN-AlCoCrFeNi [15], -TiCN-CoCrFeNiCu [16], -Ti(C,N)-ВЭС на основе (Co, Fe, Ni) [17], -TiCN-CrMnFeCoNi [18], -TiC-CoCrFeNiMe (Me = Mn, Ti, Al) [19].…”

“…Ранее [19] была исследована возможность получения кермета на основе высокоэнтропийного связующего (CoCrFeNiMn, CoCrFeNiTi и CoCrFeNiAl) и добавки смеси Ti + C методом самораспространяющегося высокотемпературного синтеза (СВС), который реализуется за счет тепла, выделяющегося при экзотермической реакции титана с углеродом. В волне горения происходит плавление 5 элементов с образованием многокомпонентного расплава CoCrFeNiMe (Me = Mn, Ti, Al), который кристаллизуется в ВЭС в качестве связующей фазы.…”

Combustion Synthesis and Reactive Spark Plasma Sintering of Non-Equiatomic CoAl-Based High Entropy Intermetallics

“…Therefore, a thermite-type reaction or a thermally coupled reaction accompanied by a large release of heat sufficient to melt metal components and form HEA can be used [ 22 ]. However, the latter approach is mainly suitable for the production of cermets, in which HEA is used as a metallic binder for ceramic grains [ 23 , 24 ].…”

Magnetic‐Nanoparticle‐Based Dispersive Micro‐Solid Phase Extraction for the Determination of Crystal Violet in Environmental Water Samples

“…Among nanomaterials, the use of magnetic nanoparticles provides a good way to separate pollutions by an external magnetic field that is cost‐effective in terms of reuse and recycling [19] . Combustion is an auspicious technique to synthesize different substances such as intermetallics, composites, and ceramics [20–22] . It is also utilized for synthesizing various nanomaterials.…”