METHOD OF FORMING MOLYBDENUM BASED WEAR RESISTANT COATING ON A WORKPIECE
A method is for forming a wear resistant coating on a workpiece. The method includes atomizing a metallic liquid including molybdenum in an atmosphere to form a crystalline metallic powder including molybdenum. The crystalline metallic powder is milled to form a nanocrystalline metallic powder including molybdenum. Moreover, the method includes thermal spraying the nanocrystalline metallic powder including molybdenum onto the workpiece.
1 . A method of forming a wear resistant coating on a workpiece comprising:
atomizing a metallic liquid comprising molybdenum in an atmosphere to form a crystalline metallic powder comprising molybdenum;
milling the crystalline metallic powder comprising molybdenum to form a nanocrystalline metallic powder comprising molybdenum; and
thermal spraying the nanocrystalline metallic powder comprising molybdenum onto the workpiece.
2 . A method according to claim 1 wherein the workpiece comprises a combustion turbine component.
3 . A method according to claim 2 wherein the combustion turbine component comprises a compressor vane.
4 . A method according to claim 2 wherein the combustion turbine component comprises a compressor vane mount.
5 . A method according to claim 1 further comprising forming a bond coating on the workpiece prior to thermal spraying.
6 . A method according to claim 1 wherein the atmosphere comprises an inert atmosphere.
7 . A method according to claim 1 wherein the atmosphere comprises an oxidizing atmosphere.
8 . A method according to claim 1 wherein milling the metallic powder comprises at least one of cryomilling, ball milling and jet milling.
9 . A method according to claim 1 wherein thermal spraying comprises at least one of thermal combustion spraying and thermal plasma spraying.
10 . A method according to claim 1 wherein the nanocrystalline metallic powder comprising molybdenum further comprises at least one of NiCrBSi, C, S, AlSi, Al 2 O 3 , brass, and bronze.
11 . A method of forming a wear resistant coating on a combustion turbine component comprising:
forming a bond coating on the combustion turbine component;
atomizing a metallic liquid comprising molybdenum in an atmosphere to form a crystalline metallic powder comprising molybdenum;
milling the crystalline metallic powder comprising molybdenum to form a nanocrystalline metallic powder comprising molybdenum; and
thermal spraying the nanocrystalline metallic powder comprising molybdenum onto the bond coating of the combustion turbine component.
12 . A method according to claim 11 wherein milling the metallic powder comprises at least one of cryomilling, ball milling and jet milling.
13 . A method according to claim 11 wherein thermal spraying comprises at least one of thermal combustion spraying and thermal plasma spraying.
14 . A method according to claim 11 wherein the nanocrystalline metallic powder comprising molybdenum further comprises at least one of NiCrBSi, C, S, AlSi, Al 2 O 3 , brass, and bronze.
15 . A method of forming a wear resistant coating on a combustion turbine component comprising:
atomizing a metallic liquid comprising molybdenum and at least one of NiCrBSi, C, S, AlSi, Al 2 O 3 , brass, and bronze in an atmosphere to form a crystalline metallic powder comprising molybdenum;
milling the crystalline metallic powder comprising molybdenum to form a nanocrystalline metallic powder comprising molybdenum;
thermal spraying the nanocrystalline metallic powder comprising molybdenum onto the combustion turbine component.
16 . A method according to claim 15 further comprising forming a bond coating on the combustion turbine component prior to thermal spraying.
17 . A method according to claim 15 wherein milling the metallic powder comprises at least one of cryomilling, ball milling and jet milling.
18 . A method according to claim 15 wherein thermal spraying comprises at least one of thermal combustion spraying and thermal plasma spraying.