Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study for Joining of Alumina Soldered by SiO$_2$-CaO-A1$_2$O$_3$ Glasses

SiO$_2$-CaO-Al$_2$O$_3$계 유리 솔더에 의한 알루미나의 접합 현상에 관한 연구

  • 안병국 (전북대학교 공과대학 신소재공학부, 신소재개발연구센터)
  • Published : 2003.04.01
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Abstract

Sintered alumina ceramics were joined by 2 kinds of SiO$_2$-CaO-A1$_2$O$_3$ glass solders having a similar expansivity as alumina. Wetting of glass/alumina was examined by sessile drop method. The observation of interface and bending strength related to alumina/glass/alumina systems were investigated by means of SEM/EDX and 4-point bending test. the result are summarized as follow: (1) Wetting of glass solders on alumina was good at temperatures higher than 145$0^{\circ}C$. (2) When the joining temperature wan high, diffusion and/or reactions between solder md alumina took place at the interface. These diffusions and reactions occurring at the interface greatly affected the bending strength of joining body. (3) Highest strength corresponding to 80% that of alumina was obtained by the solder of 35SiO$_2$-35CaO-30A1$_2$O$_3$(wt%) glass.

Keywords

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