Abstract: An object is to provide a ceramic matrix composite (CMC) having a tensile strength of 150 MPa or more and high heat resistance such that the ratio at which the tensile strength of the CMC retains after the CMC has been exposed to a high-temperature environment for a long period of time, that is, at 1200° C. for 100 hours, is 80% or more. A ceramic matrix composite comprising a ceramic matrix and a continuous ceramic fiber, the ceramic matrix including a sintering inhibitor having an average particle size of 0.28 ?m or less.

Abstract: Provided are a cover-layer-including ceramic continuous fiber suitable for producing a ceramic matrix composite material that can have improved damage tolerance and a ceramic matrix composite material formed from the cover-layer-including ceramic continuous fiber. The cover-layer-including ceramic continuous fiber includes a ceramic continuous fiber and a cover layer formed of an inorganic acid salt and disposed on the surface of the ceramic continuous fiber, wherein the thickness variation coefficient of the cover layer is 80% or less.

Abstract: An object is to provide metal element-having ceramic continuous fibers suitable for use in the production of highly heat-resistant CMCs, and a CMC made therewith. The ceramic continuous fibers comprise ceramic continuous fibers and at least one metal element therein, with the concentration by mass of the metal element being 10 ppm or more and 1000 ppm or less.