Mechanical Properties of Spark Plasma Sintered ZrC‐SiC Composites

Syntheses of ZrC–SiC nanopowder via sol–gel method

“…Fig. 3 shows the XRD patterns of products obtained from different samples after pyrolysis at 1500 1C for 1 h. Similarly to other published works [30], in ZrC-SiC composite nanopowder, the diffraction peaks of ZrC are predominant, while the diffraction peaks of SiC can be observed only when the SiC contents are high enough. This is because the X-ray diffractions of SiC are much weaker than those of ZrC.…”

Preparation of ZrC/SiC composites by using polymer-derived ceramics and spark plasma sintering

“…For a composition of ZrC /10wt%SiC, the elastic constants reported by Lucas et al [12] are pretty close to the one obtained in this study. For the Vickers hardness, the reported values were quite close to those reported by Sagdic et al [8] but lower than the Vickers hardness of both monolith ZrC and SiC (Hv > 20 GPa) [30].…”

“…In this way, research has focused on the use of field-assisted sintering techniques such as Spark Plasma Sintering (SPS) to improve the densification without resorting to high sintering temperatures. Starting from ZrC and SiC powders, a fully dense (99% relative density) ZrC/SiC (10 vol%) composite can be obtained by SPS under vacuum at 1850 °C for 5 min and a uniaxial pressure of 40 MPa [8]. Despite the densification improvement of the composite by SPS, utilizing carbide powders as starting materials did not offer the possibility to control the shaping of materials as well as their chemical and microstructural homogeneity.…”

Pressureless sintering of ZrC with variable stoichiometry

“…This is an acceptable base for numerous applications. Crack toughness data with K Ic = 3.3 MPa·m 1/2 for SPS sintered ZrC were found in literature from previous work of Sagdic et al [27] Two types of electrical resistance investigations were performed. The first measurement used a setup which allows test temperatures up to 2000 ℃ on large samples (150 mm in length).…”