SURFACE-TENSION OF MOLTEN MANGANESE AND I TS WETTABILITY ON ZIRCONIA-YTTORIA CERAMICS

The surface tension and the wettability of molten metal-ceramic system , which are the indispensable parameters in considering molten metal i nfiltration into pores of ceramics, have been studied by the use of th e sessile drop method. Manganese and zirconia ceramics containing ytto ria were prepared as the metal and the ceramic, respectively. The surf ace tension of molten manganese was approximately 1.1 N/m at 1573 simi lar to 1773 K. The contact angle was in the range of 74 degrees simila r to 86 degrees, suggesting that this metal-ceramic system had a good wettability. Manganese diffused into zirconia matrix. Estimating the b ond strength at interface, it was presumed that not only intermolecula r force but also chemical interaction force contributed to the interfa cial bond.