Mechanical properties and rapid consolidation of binderless nanostructured tantalum carbide

Graphene NanoPlatelets reinforced tantalum carbide consolidated by spark plasma sintering

“…Both samples show presence of 2D peak at ~ 2700 cm¬-1, as reported for graphene Raman spectra at 514 nm [24]. The intensity ratio of 2D/G peak is almost 4 for single layer graphene [24] and decreases with an increase in the number of layers [24][25][26][27]. The intensity of 2D band becomes lower than G for bulk graphite [24][25][26][27].…”

“…The intensity of 2D band becomes lower than G for bulk graphite [24][25][26][27]. Moreover, the 2D peak in single layer graphene is a narrow and sharp one, which gets broadened and shows sign of splitting with increasing number of graphene layers [24][25][26][27]. In the present study, both the powder and pellet shows broadened 2D peak with sign of splitting, indicating presence of multiple graphene layers.…”

“…The intensity ratio of 2D/G peak is almost 4 for single layer graphene [24] and decreases with an increase in the number of layers [24][25][26][27]. The intensity of 2D band becomes lower than G for bulk graphite [24][25][26][27]. Moreover, the 2D peak in single layer graphene is a narrow and sharp one, which gets broadened and shows sign of splitting with increasing number of graphene layers [24][25][26][27].…”

“…Tantalum Carbide is an ultra high temperature ceramic (UHTC) with high Young's Modulus (435 GPa) [21], high hardness (13.5-20 GPa) [22], high melting temperature (3880 ˚C) [23], and high resistivity to oxidation and chemical attack which ) [24] of TaC is a limiting factor for such applications.…”

Microstructure and Mechanical Properties of Nanofiller Reinforced Tantalum-Niobium Carbide Formed by Spark Plasma Sintering

“…Tantalum Carbide, as well as other UHTC materials such as NbC, VC, and HfC, has been consolidated into bulk form using various processing approaches (outlined in Table 3) including hot pressing [26][27][28][29][30][31], pressureless sintering [32,33], vacuum plasma spraying [34], high frequency induction heating [35,36], and spark plasma sintering [37][38][39][40]. Differences in heating and cooling rates, temperatures, dwell times, and pressures will impact the phase formation, microstructures, and densification of the final product.…”