Provided is a composite sheet including a porous nitride sintered body having a thickness of less than 2 mm and a resin filled in pores of the nitride sintered body, wherein a filling rate of the resin is 85% by volume or more. Provided is a method for manufacturing a composite sheet including an impregnation step of impregnating pores of a porous nitride sintered body having a thickness of less than 2 mm with a resin composition having a viscosity of 10 to 500 mPa.Math.s to obtain a resin-impregnated body, and a curing step of heating the resin-impregnated body to semi-cure the resin composition filled in the pores.

One aspect of the present disclosure is a method for evaluating adhesiveness performance and heat radiation performance of a composite including a porous sintered ceramic component and a semi-cured product of a resin filled into pores of the sintered ceramic component, including a step of emitting ultraviolet rays to the surface of the semi-cured product of the composite; a step of measuring an emission intensity of fluorescence generated from the semi-cured product; and a step of evaluating adhesiveness performance and heat radiation performance of the composite using the value of the emission intensity.

One aspect of the present disclosure is a method for evaluating adhesiveness performance and heat radiation performance of a composite including a porous sintered ceramic component and a semi-cured product of a resin filled into pores of the sintered ceramic component, including a step of emitting ultraviolet rays to the surface of the semi-cured product of the composite; a step of measuring an emission intensity of fluorescence generated from the semi-cured product; and a step of evaluating adhesiveness performance and heat radiation performance of the composite using the value of the emission intensity.

One aspect of the present disclosure provides a composite sheet including a porous sintered ceramic component having a thickness of less than 2 mm and a resin filled into pores of the sintered ceramic component, wherein the resin is a semi-cured product of a resin composition including a compound having a cyanate group and the content of triazine rings in the resin is 0.6 to 4.0 mass %.

One aspect of the present disclosure provides a composite sheet including a porous sintered ceramic component having a thickness of less than 2 mm and a resin filled into pores of the sintered ceramic component, wherein the resin is a semi-cured product of a resin composition including a compound having a cyanate group and the content of triazine rings in the resin is 0.6 to 4.0 mass %.

A composite sheet includes porous a nitride sintered body having a thickness of less than 2 mm and resins filled in pores of the nitride sintered body, and has a main surface having a maximum height roughness Rz of less than 20 μm. A method for manufacturing the composite sheet includes an impregnating step of impregnating pores of a porous the nitride sintered body having a thickness of less than 2 mm with a resin composition, a smoothing step of smoothing the resin composition attached to a main surface of the nitride sintered body to obtain a resin-impregnated body in which a part of the main surface is exposed, and a curing step of heating the resin-impregnated body to cure or semi-cure the resin composition impregnated in the pores to obtain the composite sheet.

One aspect of the present invention is a method for producing a composite, including a step of placing a porous boron nitride sintered body immersed in a resin composition under a pressurized condition and then placing the boron nitride sintered body immersed in the resin composition under a pressure condition lower than the pressurized condition, wherein the step is repeated a plurality of times.

One aspect of the present invention is a method for producing a composite, including a step of placing a porous boron nitride sintered body immersed in a resin composition under a pressurized condition and then placing the boron nitride sintered body immersed in the resin composition under a pressure condition lower than the pressurized condition, wherein the step is repeated a plurality of times.

This method is suitable for the strengthening of concrete or timber structures by applying prestressed Carbon FRP or Glass FRP lamella. At least one groove is cut into the concrete or timber structure along the direction in which the concrete or timber structure is to be strengthened. The grooves are filled with epoxy resin and a layer of epoxy resin is put onto the entire section to be equipped with the CRFP or GFRP lamella. The lamella is prestressed and anchored at both ends. U-shaped brackets are then being put over the two end sections of the CFRP or GFRP lamella by inserting and submerging its both U-legs into holes filled with resin as well. These holding brackets are then tightly pressed onto the CFRP or GFRP lamella to prevent cracking or fracture of the concrete or timber and bending away of the extremities of the CFRP or GFRP lamella.

Coating compositions suitable for machined cementitious substrates are provided. The coating compositions provide adhesion to the machined cementitious substrate while maintaining high mechanical film strength. The coating compositions are also compatible with industrial implementation, and exhibit good pot life.