Method of manufacturing a turbine shroud segment

A method of manufacturing a turbine shroud segment for a gas turbine engine defining an engine axis, the method comprising the steps of:

• receiving a turbine shroud segment green part made of powder injection molding material, the turbine shroud segment green part including a body extending axially between a leading edge and a trailing edge and circumferentially between a first lateral edge and a second lateral edge, the body having a radially outer surface and a radially inner surface;
• machining a textured surface on the radially outer surface of the body to obtain a machined turbine shroud segment green part,
• peck drilling an axial cooling flow passageway in the turbine shroud segment green part in a plurality of drilling cycles, the axial cooling flow passageway having a diameter, and the peck drilling comprises, during a drilling cycle of the plurality of drilling cycles, plunging the drilling tool through the turbine shroud segment green part to a distance corresponding to more than five times the diameter of the axial cooling flow passageway;
• and
• after the machining of the textured surface and the peck drilling of the axial cooling flow passageway, debinding and sintering the machined turbine shroud segment green part.

A method of manufacturing a turbine shroud segment for a gas turbine engine defining an engine axis, the method comprising the steps of:

• injecting powder injection molding material into a mold for forming a molded turbine shroud segment green part including a body extending axially between a leading edge and a trailing edge and circumferentially between a first lateral edge and a second lateral edge, the body having a radially outer surface and a radially inner surface, the mold having cavities defining negatives of features forming a textured surface on the radially outer surface of the body;
• peck drilling an axial cooling flow passageway in the turbine shroud segment green part in a plurality of drilling cycles, the axial cooling flow passageway having a diameter, and the peck drilling comprises, during a drilling cycle of the plurality of drilling cycles, plunging the drilling tool through the turbine shroud segment green part to a distance corresponding to more than five times the diameter of the axial cooling flow passageway;
• and
• debinding and sintering the molded turbine shroud segment green part.