PURPOSE: To surely perform ceramics lining for a blade wheel in simple ways by forming the engaging projections onto the obverse surface of a blade wheel and forming a recessed groove engaged with the engaging projection onto the reverse surface of a small piece made of ceramics.

CONSTITUTION: Small pieces 5 made of ceramics are arranged in closely attached state onto the surface of a blade plate 2 of a vane wheel 1 and the surfaces of a main plate 3 and a side plate 4, and a lining layer 500 is formed. In this case, engaging projections 6 are formed on the surface of the part which forms the lining layer 500. The engaging projections 6 are formed to have an inverted trapezoid-shaped section and arranged in a prescribed intervals in the longitudinal direction in parallel to the direction (x) of flow of the inhaled fluid or in the transverse direction crossing at right angles with the direction (x) of flow. While, a recessed groove 7 engaged with the engaging projection 6 is formed on the reverse surface of the small piece 5. The small pieces 5 are installed onto the vane wheel 1 by engaging the recessed groove 7 with the engaging projection 6.