Microstructure and mechanical properties of the spark plasma sintered TaC/SiC composites: Effects of sintering temperatures

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

“…[124] Reduction of oxygen by C or B 4 C additives therefore enhances the densification process of TaC. [125] Oxygen removal is also possible by adding MoSi 2 , TaSi 2 , or SiC. [126,127] MoSi 2 reacts with surface oxides present on HfB 2 particles, forming silica and liquid Mo-Si-B alloys at high temperature.…”

Graphene NanoPlatelets reinforced tantalum carbide consolidated by spark plasma sintering

“…SPS has very high heating and cooling rates which minimizes grain growth while still leading to high density compacts. Several studies have shown SPS having great potential for efficient consolidation of UHTCs [32,46,[67][68][69]. Mechanisms, advantages, and disadvantages of SPS will be discussed in detail in a later section of this thesis as its importance merits a more in depth discussion.…”

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.…”

“…Other sintering additives that have previously been shown to enhance densification while better maintaining the high temperature properties of the ceramic include carbon, TaB 2 , TaSi 2 , MoSi 2 , SiC, B 4 C, and Si [28,30,31,33,37,39].…”

“…The mechanical properties of these UHTC composites with sintering additive are usually as good as or better than the monolithic. Liu et al [39] prepared TaC with 20 vol.% SiC as sintering additive and saw an increase in Young's modulus, Vickers hardness, flexural strength, and fracture toughness. The increase in mechanical properties can be attributed to the reduction of residual porosity and/or the properties of the secondary phases formed.…”