<報文>SiO_2-CaO-Al_2O_3 系ガラスによるアルミナの接合

概要

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Sintered alumina ceramics were joined without applying pressure by 3 kinds of SiO_2-CaO-Al_2O_3 glass solders having a similar expansivity as alumina. Wetting of glass/Al_2O_3 was examined by sessile drop method. The observation of interface and bending strength related to Al_2O_3/glass/Al_2O_3 systems were investigated by means of SEM/EDX and 4-point bending test. The results are summarized as follows : (1) Wetting of glass solders on alumina substrate was good at temperatures higher than 1450℃. (2) When the joining temperature was high, diffusion and/or reactions between solder and alumina took place at the interface. These diffusion and reactions occurring at the interface greatly affected the bending strength of the joined body. (3) Highest strength corresponding to 80% that of alumina was obtained by the solder of 35SiO_2-35CaO-30Al_2O_3 (mass%) glass.joiningaluminaglass solderwettinginterfacediffusionreactionbending strength
東北大学の論文
1991-12-27