Coating forming method and coating forming material, and abrasive coating forming sheet

A coating formation method comprising:

• a lamination step of laminating a brazing filler metal layer and a coating material layer on a surface of an object to be coated, the brazing filler metal layer being composed essentially of a brazing filler metal, and the coating material layer being composed essentially of a coating material;
• a melting step of heating the laminated brazing filler metal layer and the coating material layer to allow at least a part of the coating material to melt, while diffusing the brazing filler metal in the coating material;
• and
• a fixing step of solidifying the melted coating material to fix it on the object to be coated,
• wherein the coating material layer has MCrAlY particles and abrasive particles, the abrasive particles being selected from a group consisting of cubic boron nitride, Al2O3, and TiN.

A method of providing a clearance between a blade and a shroud, comprising:

• laminating a brazing layer and a coating layer on a surface of one of the blade and the shroud, the coating layer comprising abrasive particles;
• heating the laminated brazing layer and coating layer to allow at least a portion of the brazing layer to diffuse into the coating layer;
• cooling the heated laminated brazing layer and coating layer to form an abrasive layer;
• and
• moving the blade relative to the shroud to remove material with the abrasive layer disposed on the one of the blade and the shroud from the other of the blade and the shroud.

A brazed layer, comprising:

• abrasive particles comprising at least one of cubic boron nitride, Al2O3, and TiN;
• a metal material resistant to oxidization;
• and
• a binder,
• wherein a ratio between a mass of the binder and a mass of the abrasive particles and the metal material is from 15:85 to 2:1 inclusive, wherein the metal comprises MCrAlY.