High-Temperature Mechanical Property Improvements of SiC Ceramics by NITE Process

Effect of carbon nanofibers (CNFs) content on thermal and mechanical properties of CNFs/SiC nanocomposites

“…The shrinkage curves indicated that a large quantity of liquid phase with an enough low viscosity for the complete rearrangement of SiC particles only formed in the interval of these temperatures. Simultaneously, yttrium-aluminum-garnet (YAG: Al 5 Y 3 O 12 ) was detected in the initial stages of this dramatic shrinkage temperature by XRD analysis [17,27]. Our previous study demonstrated that nano-sized powder was more effective way to obtain dense SiC ceramics than submicronsized powder below 1900°C because the capillary adhere force was enhanced by the increase of the contact point number among SiC particles even with a relatively small amount of sintering additives [28].…”

“…SiC nano-powder in NITE process was employed for the excellent infiltration and densification of matrix inside fiber bundles, in which the fabrication temperature and applied pressure should be as low as possible to avoid fiber damages. The previous work reported that NITE-derived SiC ceramics (NITE-SiC) corresponding to matrix in the composites had superior mechanical properties at high temperature to those of conventional LPS-SiC [17]. In addition, SiC ceramics and their composites are often required to possess a high thermal conductivity in order to reduce thermal stresses that arise due to the presence of thermal gradients within the component.…”

Erosive Wear Mechanism of New SiC/SiC Composites by Solid Particles

“…1). State of the art in SiC/SiC composites has solved most of the potential issues of near-net shaping and machining, joining technology and evaluation technology [68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86]. There are no doubts that SiC/SiC composites are at the forefront of advanced materials technology and prime candidates for structural material in severe environments.…”

Thermal stress relaxation creep and microstructural evolutions of nanostructured SiC ceramics by liquid phase sintering

“…12,13 In the last years, nanostructured LPS-SiC ceramics using SiC nano-powder as a starting material have been widely researched in the world because of its excellent performances on sinterability and mechanical properties. [14][15][16] However, the very fine grains derived from nano-powder enhance grain-boundary activity in SiC ceramics, thus creep of nanostructured LPS-SiC ceramics has to be evaluated.…”