拡散接合法による鋳鉄とセラミックスとの複合化

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Diffusion bonding between spherodial graphite cast iron (FCD 45) and high performance ceramics (Sl- ALON) was carried out by holding at 1273K for various times under the applied presurre of 16 MPain vacuum using nickel foil as an insert metal. Microscopic observation. electron probe X-ray micro- analysis (EPMA) and scanning electron microscopic (SEM) observation have been emplored in order toclarify the effect of the nikel foil at the bond interface. The effect of the nikel foil thickness on thetensile strength of the joints was also investigated.The tensile strength of the joints strongly depended on the increase of inserted nikel foil thickness.It was confirmwd by SEM and EPMA that the iron as elements of spherodial graphite castiron (FCD45) and the aluminum as elements of high performance ceramics(SlALON) exist in solution in thenickel foil. The use of nickel foil as insert — metal was effective to be a cause for an appreciable im-provement of the bonding strength.A high value of bonding strength. Z7.8MPa. was obtained by the tensile test of the bonded speci- mens.Key Words: Diffusion bonding, cast irom, ceramics, nikel foil, insert - metal
福島工業高等専門学校の論文