| 摘要 |
PURPOSE:To enhance bonding strength by forming a middle layer contg. a high m.p. metal and a specified grain boundary reactive metal on the surface of a ceramic body contg. a spinel compd. and a layer of a brazing filler metal on the middle layer and joining the ceramic body to a metal body. CONSTITUTION:The surface of an Al2O3-based ceramics sintered body contg. >=70wt.% spinel compd. such as MgAl2O4 is polished, washed with a solvent and coated with paste of powders of a high m.p. metal such as Mo and a grain boundary reactive metal reacting with the grain boundary forming component of the ceramic body, e.g., Mn as middle layer forming metals. The coated surface to be joined is metallized by heating to a prescribed temp. in a humidified atmosphere. Brazing is then carried out with an Ag-Cu alloy as a brazing filler metal and a metal body such as stainless steel is joined to the ceramics sintered body with a layer of the filler metal in-between to obtain a joined body having superior bonding strength and radiation resistance.
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