Continuous fiber-reinforced silicon carbide member, manufacturing method thereof, and nuclear reactor structural member

A continuous fiber-reinforced silicon carbide member which is a tube-shaped continuous fiber-reinforced silicon carbide member, the member comprising:

• a first composite material layer in which fiber bundles including bundled long fibers which are continuous fibers of silicon carbide are combined with a matrix of silicon carbide;
• a second composite material layer in which fiber bundles including bundled long fibers which are continuous fibers consisting of carbon are combined with a matrix of silicon carbide, wherein the second composite material layer does not include other fibers other than the continuous fibers of carbon;
• and
• an intermediate layer interposed between, and directly contacting, the first composite material layer and the second composite material layer,
• wherein the first composite material layer and the second composite material layer are stacked by the second composite material layer being formed on an outer peripheral surface of the first composite material layer,
• wherein the intermediate layer is formed of a single body of a material selected from the group consisting of titanium aluminum carbide, vanadium aluminum carbide, chromium aluminum carbide, niobium aluminum carbide, tantalum aluminum carbide, and titanium silicon carbide,
• wherein the fiber bundles of the first composite material layer comprise 500 to 3000 pieces of the continuous fibers of silicon carbide, each fiber having a diameter of 12 μm, and
• wherein the long fibers of the fiber bundles of the second composite material layer each have a diameter of 10 μm.