C-C NOZZLE (Syllabus: GS Paper 3 – Sci and Tech)

Context: The Indian Space Research Organisation (ISRO) recently said that it has successfully developed a lightweight Carbon-Carbon (C-C) nozzle for rocket engines.

C-C nozzle

• About: It is a lightweight Carbon-Carbon (C-C) innovation designed to optimize rocket engine performance.
• Developed by: The Indian Space Research Organisation (ISRO), the C-C nozzle represents cutting-edge advancements in rocket technology.

• Key Feature: 

o Anti-Oxidation Coating: The nozzle boasts an anti-oxidation coating of Silicon Carbide, significantly expanding its operational capabilities in oxidizing environments.

o Enhanced Durability: This coating minimizes thermally induced stresses and enhances corrosion resistance, allowing for extended operational temperature limits in challenging environments.

o Potential Application in PSLV-4: The Polar Satellite Launch Vehicle (PSLV)-4 currently employs twin engines with nozzles made from Columbium alloy.

o Mass Reduction Potential: By substituting these engines with the C-C nozzle, a substantial mass reduction of approximately 67% can be achieved.

o Increased Payload Capability: This substitution is estimated to increase the payload capability of the PSLV by 15 kg, enhancing its efficiency and versatility.