Self‐Propagating High‐Temperature Synthesis of Hard Materials

TiC–TiB2 composites: A review of phase relationships, processing and properties

“…16 The SHS process is characterised by several advantages including fast reaction rates, low power consumption and high-energy efficiency provided by the exothermic reactions. 52 An additional attraction is the ability to apply pressure on the products during synthesis and this can simultaneously lead to densification of monolithic and composite materials. 52 The highly exothermic reactions (for example, the reaction between Ti and C produces an exothermic energy equal to 183.1 kJ/mol) become self-sustaining after they have been initiated by a low energy input (ignition).…”

“…52 An additional attraction is the ability to apply pressure on the products during synthesis and this can simultaneously lead to densification of monolithic and composite materials. 52 The highly exothermic reactions (for example, the reaction between Ti and C produces an exothermic energy equal to 183.1 kJ/mol) become self-sustaining after they have been initiated by a low energy input (ignition). The high combustion temperature allows the volatilisation of the impurities, which are expelled as the reaction wave propagates through the sample.…”

Air-exposed combustion synthesis of Al2O3 nanofibers in Al/TiO2/C system

“…Thirdly, the metal/ gas reactions provide much larger reaction front area, rather than solid/solid reactions, which can cause the metal to evaporate more easily. The reaction front area is an effective parameter which has always been mentioned in SHS studies of both solid/solid and solid/gas reactions [1,4]. Of course, this phenomenon is much more effective in reactants of nano-sized scale [16].…”

“…Combustion synthesis, also called self-propagating hightemperature synthesis (SHS), is a technique for producing a wide range of materials, mostly ceramics and intermetallics [1]. In this method, the reaction takes place through a highly exothermic reaction similar to wick burning.…”

Structure formation and densification of TiB2-TiC-Ni composites produced by chemical reaction of Ti-B4C system in high-gravity field

“…Many high-melting-point ceramics including TiB 2 and TiC also were synthesized by means of SHS that was usually based on highly exothermic reactions [3,4] . Meanwhile, pressure on the products could be applied during synthesis, which lead to densification of products in the SHS process [5,6] . High pressure selfcombustion synthesis (HPCS) has been used in a number of studies [7][8][9] to consolidate TiB 2 -TiC composites.…”