SHS of Silicon‐Based Ceramics for the High‐Temperature Applications

Abstract

High-temperature materials attract a growing interest from both the scientists and engineers, since the increase of the operating temperatures is crucial for the enhancement of many energy conversion processes. Another area of application of high-temperature materials is high-velocity air flight, where the ultra-high temperature ceramics (UHTCs) are pivotal for the creation of robust nose tips and leading edges of the skins of high-velocity jets. Compounds of refractory metals with silicon, such as TaSi 2 , MoSi 2 , ZrSi 2 , are characterized by unrivaled resistance in aggressive environments. However, most of them are not suitable for application as high-temperature structural materials due to the low mechanical properties. Therefore, they are frequently used as a constituent for the high-temperature composite materials such as TaSi 2 -SiC, ZrC-MoSi 2 , ZrB 2 -MoSi 2 , ZrB 2 -ZrSi 2 . One of the most convenient ways of producing these composite materials is self-propagating hightemperature synthesis (SHS), known for its high productivity, energyefficiency, and ecological safety. This review summarizes the latest developments of the SHS of the silicon-based high-temperature ceramics.

Advances in the Synthesis of Preceramic Polymers for the Formation of Silicon-Based and Ultrahigh-Temperature Non-Oxide Ceramics

“…Common matrix composites take the form MX/SiC (M = Ti, Zr, Hf; X = B, C, N) as the addition of a SiC phase improves oxidative resistance . There has been comparatively little in the way of PCPs for UHTCs with the bulk of UHTCs made via traditional powder-processing methods. − These powder-based methods have been recently reviewed by the groups of Basu (TiB 2 ), Shokouhimehr and Suri (ZrB 2 ), , Zaykoski (HfB 2 ), Jiang (TiC), Lee and Levashov (ZrC and others), , and Vorotilo (HfC) . Additionally, the powder preparation of group IV nitrides has been recently reviewed by Chernyavskii .…”

Materials, properties, manufacturing methods and cutting performance of innovative ceramic cutting tools − a review

“…However, some major drawbacks related to SiC and Si 3 N 4 (low electrical conductivity, low resistance toward the corrosion by water vapor and alkali cations, unstable mechanical properties under oxidation) were recognized. These drawbacks prevented the large-scale implementation of SiC and Si 3 N 4 -based materials as high-temperature ceramics [129].…”

B4C Composites with a TiB2-C Core–Shell Microstructure Produced by Self-Propagating High-Temperature Synthesis-Assisted Spark Plasma Sintering

“…An emerging trend in SPS studies is the use of starting powders that go through exothermic reactions in order to yield the final desired composition. , The heat produced during exothermic reactions tends to cause a reduction in the sintering temperature, which facilitates easier densification. Generally, if the adiabatic temperature of an in situ exothermic reaction, which can be calculated based on the enthalpy of the reaction and heat capacities of the products, is less than 1200 °C, a combustion does not occur, but for adiabatic temperatures between 1200 and 2200 °C, a combustion synthesis does occur, while the reaction front cannot propagate.…”