Patent ID: 7165946

Claim:
An apparatus comprising: a housing including a plurality of temperature sections that includes a 950° to 1500° F. section, and the 950° to 1500° F. section including a shroud surface being, comprised of a non-abradable material; at least one rotating blade row being positioned within the 950° to 1500° F. section, and including a surface being, at least in part, comprised of a relatively non-abradable material; and a relatively abradable coating covering at least a portion of the shroud surface of the 950° to 1500° F. section, and including a metallic matrix being 55–85% of the coating by volume and at least one of a thermoplastic and a dry lubricant; and the relatively abradable coating on a lower temperature portion of the 950° to 1500° F. section having a different proportion of the at least one of a thermoplastic and a dry lubricant than the relatively abradable coating on a higher temperature portion of the 950° to 1500° F. section.