Composite-material blade, rotary machine, and method for forming composite-material blade

A composite blade formed by using a fiber reinforced resin containing a resin and reinforcing fibers, the composite blade comprising:

• a preform portion provided on an inner surface of the composite blade;
• and
• a first covering unit that covers an outer surface of the preform portion, wherein
• the preform portion is formed by using a carbon fiber reinforced plastic containing a first resin and carbon fibers, and
• the first covering unit is formed of an elastic polymer fiber reinforced resin containing a second resin and elastic polymer fibers, and has more impact resistance than the preform portion,
• wherein the preform portion has a pressure-side blade surface which is one blade surface in a blade thickness direction, a suction-side blade surface which is the other blade surface in the blade thickness direction, and a neutral portion provided between the pressure-side blade surface and the suction-side blade surface, and
• the neutral portion is formed by using the same material as the first covering unit.