Research of material for uncooled nozzle extensions of liquid rocket engines

One of the ways to increase the performance of liquid rocket engines (LRE) is to use nozzle extensions (NE) made of carbon–carbon composites (CCC). The following works were performed during development of the NE: a fabrication method was verified, physicomechanical properties of the material were defined, effects of high temperature on a CCC oxidizing resistance were studied, a method to protect CCC against oxidation was developed. Prototype NE were manufactured and tested in a LRE test chamber. The test firings demonstrated good performance characteristics of CCC.