Bonding Behavior of Alumina Ceramic to Metals

,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 16(3); 1979 > Article

Journal of the Korean Ceramic Society 1979;16(3): 169.

알루미나 세라믹과 금속과의 접합거동

김종희, 김정태

한국과학원 재료공학과

Bonding Behavior of Alumina Ceramic to Metals

ABSTRACT

The effect of apparent porosity of the fired ceramics, metallizing temperature, and metallizing mixtures on the bond strength in metal-to-ceramic seals was investigated. Three different metallizing compounds were metallized on dense alumina bodies at 1300~$1500^{circ}C$ in dry hydrogen atmosphere. Bond strength between metal and alumina body was measured by means of nstron test machine. The greater bond strength was observed as the apparent porosity and metallizing temperature was increased. This work indicated that the glassy phase in metallizing mixture, having had sufficient fluidity to migrate into the alumina body, reacted with alumina and thereby forming strong metal-ceramic interface bond. It also showed that the glassy phase having higher thermal expansion cofficient than molybdenum might contribute to the strong bond formation by providing compressive stress around the molybdenum particle.