The pressure vessel in which propellant burns. Usually a copper-alloy liner carrying regenerative cooling channels inside a structural jacket.
What decides the purchase: Chamber pressure · throat diameter · characteristic length L* · contraction ratio · coolant channel geometry · wall temperature
Typical materials: CuCrZr and NARloy-Z copper alloys for the liner; Inconel 718/625 or electroformed nickel for the jacket
Typical processes: Laser powder bed fusion, electroforming, brazing, EB welding, milled channel and close-out
What changes when it has to fly: Life is set by low-cycle thermal fatigue in the liner. Coolant channel dimensional accuracy is the whole game — additive manufacture is used because the channels cannot be drilled.
Engineering reference written by us, not a supplier claim.
No Indian supplier in this index makes combustion chamber, plus 2 international.
| Supplier | Location | Certifications | Evidence |
|---|---|---|---|
| ArianeGroup intl | international | — | stated capability |
| Ursa Major intl | international | — | stated capability |
Certifications are as published by each company and unverified. "Product indexed" means we hold an actual product record; "stated capability" means the company says it does this.