Synthesis of WSi2–ZrO2 and WSi2–Nb composites by field-activated combustion

Synthesis of tungsten carbide–cobalt composites by the field-activated combustion synthesis method

“…Recently, a new method, referred to in the literature as field-activated combustion synthesis (FACS) [2], based on the use of an electric field to activate self-propagating reactions in their relatively low heat of formation or less-exothermic systems, has been developed. Experimental results and modeling studies have led to the conclusion that the effect of the field is to provide Joule heating at a rate of σE 2 , with σ being the conductivity and E the field [3][4][5]. Depending on the electric conductivity of reactants and products, ignition results in the initiation and propagation of a combustion wave in reactant systems, which heretofore could not be synthesized by SHS (without preheating), including SiC, SiC-AlN, B 4 C-TiB 2 , MoSi 2 -SiC, Ti 3 Al and others [6][7][8][9][10][11][12][13].…”

Synthesis of dense WSi2 and WSi2-xvol.%SiC composites by high-frequency induction heated combustion and its mechanical properties

“…Indentations with large enough loads (10 Kg f ) produced median cracks around the indent. The length of these cracks permits an estimation of the fracture toughness values of the materials by means of the expression [26,27]: (4) where c is the trace length of the crack measured from the center of the indentation, a is half of the average length of two indent diagonals, and H v is the hardness. A typical indentation pattern for the WSi 2 -30vol.%SiC composite is shown in Fig.…”