Patent ID: 7553385

Claim:
A process for forming a combustion chamber liner comprising the steps of: providing a mandrel formed from an aluminum containing material having a net shape of a combustion chamber liner; depositing a powdered metal material onto said mandrel without melting said powdered metal mandrel; said depositing step comprising depositing at least one layer of a copper alloy containing chromium and niobium using a deposition technique which does not melt said copper alloy and which causes copper alloy particles to plastically deform and bond to a surface of the mandrel and thereby creating a deposited article having the shape of said combustion chamber liner on said mandrel and having a uniform distribution of Cr 2 Nb particles in a copper matrix with fine Cr 2 Nb particles being located at copper grain boundaries; and removing said material forming said mandrel to leave a free standing monolithic combustion chamber liner formed from said copper alloy.