This paper reports an evaluation of the fracture behavior of metal/ceramic composites by small punch test. A specific material combination of a stainless steel and a zirconia was employed. Disk specimens for small punch test of metal/ceramic composite having definite metal/ceramic ratios were prepared by powder metallurgical method. Small punch test was conducted at room temperature. A specific transition behaviors from ductile to brittle fracture have been found to depend on the composition and microstructure. The ductile-brittle transition was observed to take place at a zirconia volume fraction of 0.4-0.6. The microstructural investigation of the fracture behaviors was also made. It has been found that fracture behaviors are strongly dependent on the continuity of the stainless steel phase; that is, the skeletal to dispersive structural transition determines the fracture behaviors.
|ジャーナル||journal of the japan society of powder and powder metallurgy|
|出版ステータス||Published - 1989|
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