Abradable coating and method of production

A turbomachine having improved sealing between a shroud and a rotor, said turbomachine comprising:

• a rotor;
• a plurality of blades connected with said rotor about a periphery of said rotor, said blades having a tip portion distal from said periphery;
• a plurality of fins connected with said tip portion;
• a shroud being adjacent said plurality of fins;
• an abradable coating covering said shroud proximate said fins, said abradable coating comprising a metal alloy having a quasicrystalline structure, silicon and a solid lubricant.

An abradable coating for placement on a turbomachine, said abradable coating comprising by weight about:

• 2-16 percent copper;
• 5-20 percent solid lubricant;
• 3-7 percent silicon;
• 1-9 percent chromium;
• 1-12 percent iron;
• 3-7 percent polyester;
• balance composed of aluminum and traces of other elements wherein at least a portion of aluminum being in a quasicrystalline phase.

A gas compressor component for a gas turbine engine, said gas compressor component comprising:

• a shroud for the gas compressor;
• and
• an abradable coating covering at least a portion of said shroud,
• said abradable coating comprising an aluminum alloy, a solid lubricant, and silicon wherein said aluminum alloy is at least partially a quasicrystalline phase.