Compatibility of silicon carbide fibers with a tungsten substrate and a titanium matrix

Silicon Cabide-Tungsten Heat Pipes for High-Temperature Service

“…This set of experiments also confirmed the prediction of Burykina et al (1973) that both W2C and W5Si3 would form first when SiC was reacted with tungsten at high temperatures. Furthermore, over the short term these two compounds appeared to be forming at about the same rate.…”

“…It is significant to note that the products of the reaction between SiC and tungsten were W5Si3 and W2C as predicted by Burykina et al (1973). Furthermore, these two compounds grow side by side apparently at the same rate as separate and distinct phases.…”

“…However, the long-term stability of CVD tungsten coating on SiC has been questioned. Burykina et al (1973) have predicted from chemical thermodynamic considerations that SiC and tungsten will react to first form a mixture of W5Si3 and W2C at temperatures as low as 1275 K. If this reaction were to occur, it is essential that its kinetics be known so that both operation and fabrication time-temperature limits of the heat pipe could be estimated. Consequently, an experimental study was performed to determine the rates of reaction between SiC and tungsten.…”

Preparation of Pyrolytic Carbon Coating from Acetylene by Cold Wall Chemical Vapour Deposition Process

“…Compared with tungsten wire, the carbon filament has lower density and can avoid detrimental reactions between the substrate and coating 1,2 . Thus, carbon monofilaments are often used as the substrate to fabricate advanced SiC fibers by chemical vapour deposition (CVD) [3][4][5] .…”