液相焼結法を利用したTi-Co系によるY-PSZの接合

概要

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Using Ti-10 wt%Co binary mixed powder compact of 1.0 mm thickness as the insert material, bonding behavior of Y-PSZ was examined under the coexistence of solid and liquid by liquid phase sintering. Bonding was carried out at 1473 K for 3.6 ks under the pressure of 1-9 MPa by hot pressing, and the highest bending strength of 213 MPa was achieved in the specimen bonded under 3 MPa.<BR>There existed the large grains in the center region of Ti-Co alloy after bonding, while near the Y-PSZ/Ti-10 wt%Co interface extremely small grains were observed. Ti and Co were observed on the fracture surface after bending test, however Zr or Y was not noticed. Therefore the interfacial strength between Y-PSZ and Ti-Co alloy is assumed to be much higher. A newly built layer, about 0.3 μmm thick, was also recognized along the interface between Y-PSZ and Ti-Co alloy.
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