Abstract: A silicon carbide single crystal manufacturing apparatus includes a crucible having a cylindrical shape and providing a hollow portion forming a reaction chamber, a pedestal disposed in the hollow portion of the crucible and having one circular surface on which a seed crystal for growing a silicon carbide single crystal is to be disposed, a gas supplying mechanism configured to supply a silicon carbide raw material gas for growing the silicon carbide single crystal on a surface of the seed crystal from below the pedestal, a heating device configured to heat and decompose the silicon carbide raw material gas, and a rotation mechanism configured to rotate the pedestal to cause the silicon carbide single crystal to grow while the seed crystal is rotated, and a center axis of the pedestal is eccentric from a rotation center of the pedestal.

Abstract: In a method for evaluating tantalum carbide, a carbonization degree of tantalum carbide is evaluated by chromaticity.

Abstract: In a method for evaluating tantalum carbide, a carbonization degree of tantalum carbide is evaluated by chromaticity.

Abstract: A cylinder block of a multicylinder engine, having a cylinder main body in which multiple cylinder bores are provided in parallel in an axial direction of a crankshaft, and a crankcase having plural journal walls. The crankcase is integrally provided with the cylinder main body, in which a communication hole extending in parallel to the axial line of the crankshaft is provided in the cylinder main body and the crankcase while at least a part of which is opened in the inner peripheral surface of the cylinder bore. This permits the cylinder block to be downsized, increases freedom of positional setting of the communication hole, and reduces ventilation resistance of air flow through the communication hole. A cut-processed member is expanded further outward from a piston slide surface and is formed along a radial direction of cylinder bores, in inner surfaces of the cylinder bores in at least portions closer to a piston at an open edge of a communication hole.

Abstract: A cylinder block of a multicylinder engine, having a cylinder main body in which multiple cylinder bores are provided in parallel in an axial direction of a crankshaft, and a crankcase having plural journal walls. The crankcase is integrally provided with the cylinder main body, in which a communication hole extending in parallel to the axial line of the crankshaft is provided in the cylinder main body and the crankcase while at least a part of which is opened in the inner peripheral surface of the cylinder bore. This permits the cylinder block to be downsized, increases freedom of positional setting of the communication hole, and reduces ventilation resistance of air flow through the communication hole. A cut-processed member is expanded further outward from a piston slide surface and is formed along a radial direction of cylinder bores, in inner surfaces of the cylinder bores in at least portions closer to a piston at an open edge of a communication hole.