Abstract: A turbocharger is provided with: a rotational shaft; a rolling bearing rotatably supporting the rotational shaft; an oil film damper disposed radially outward of an outer ring of the rolling bearing; and a housing having a first axial retaining portion and a second axial retaining portion, disposed adjacent to both ends of the oil film damper in the axial direction, respectively, for restricting movement of the outer ring in the axial direction. An axial end surface of the outer ring, or a facing surface of the first axial retaining portion or the second axial retaining portion facing the axial end surface of the outer ring has: a coefficient of static friction smaller than that of a portion of the housing excluding the first axial retaining portion and the second axial retaining portion; or has a recess where oil of the oil film damper can enter.

Abstract: The silicon carbide powder is a powder of silicon carbide having an ?-type crystal system, where the number of small corner portions among corner portions on a surface of a primary particle of silicon carbide constituting the powder of silicon carbide is 2.5 or less per one primary particle. The small corner portion is a corner portion, among corner portions present in a contour of the primary particle in a projection image of the primary particle, where twice a curvature radius of the corner portion is 1/5 or less of a Heywood diameter of the projection image of the primary particle.

Abstract: There are provided a filler capable of increasing the thermal conductivity of a molded body of a resin composition obtained by being blended in resins, such as plastics, curable resins, or rubbers, and a molded body and a heat dissipating material having high thermal conductivity. A resin composition containing a filler and a resin is molded to give a molded body, and a heat dissipating material is obtained from the molded body. The filler contains secondary particles which are sintered bodies of powder containing primary particles of ceramic. The filler has a specific surface area measured by the BET method of 0.25 m2/g or less and granule strength measured by a microcompression test of 45 MPa or more.