Abstract: A method for forming a thermally stable honeycomb panel which may be used constructing large mirrors employs thermally stable composite planks comprised of about 50% graphite fibers and of about 50% borosilicate glass. These planks which are formed by hot pressing in vacuum serve as a basic construction material.The thermally stable honeycomb panel is comprised of a core member, a backplate member, and a faceplate member which are bonded by bonding process after a wet frit paste is first applied and then dried to remove volatile solvents. The bonding is completed in an oven in an air atmosphere at a temperature sufficient to melt the glass in the frit paste after the organic binder material is boiled out. After holding the honeycomb panel components at a predetermined temperature for ensuring that all the glass in the frit is melted, the bonded panel is allowed to cool to room temperature.

Abstract: A method of bonding a graphite fiber reinforced glass matrix composite to a metal structure comprising depositing a layer of eutectic alloy metal component to the bond surfaces of the metal and composite followed by placing the thus treated bond surfaces of the metal and composite together with a layer of eutectic alloy containing such metal therebetween. The metal-bond-composite is then heated to melt the alloy and bond the composite to the metal. Articles formed by such a process are also described. The method has particular utility in bonding cooling channel containing metal bases to graphite-glass composite laser mirrors.

Abstract: A method of bonding a graphite fiber reinforced glass matrix composite to a metal structure comprising depositing a layer of eutectic alloy metal component to the bond surfaces of the metal and composite followed by placing the thus treated bond surfaces of the metal and composite together with a layer of eutectic alloy containing such metal therebetween. The metal-bond-composite is then heated to melt the alloy and bond the composite to the metal. Articles formed by such a process are also described. The method has particular utility in bonding cooling channel containing metal bases to graphite-glass composite laser mirrors.