Interface interaction and wetting of Sc2O3 exposed to Cu-Al and Cu-Ti melts Academic Article uri icon

abstract

  • Scandia is a thermodynamically stable oxide and could be used as a structural material for a crucible in order to avoid a melt contamination. In the present study wetting experiments of Cu–Al and Cu–Ti melts on Scandia substrate were preformed at 1423 K by a sessile drop method. It was established that Al and Ti additions lead to the improved wetting and that the final contact angle decreases with increasing the additives concentration. For Al containing melts, the contact angle changes gradually with time, and a relatively thick interaction layer, which consists of Al 2 O 3, Sc 2 O 3, and metallic channels, was formed at the Sc 2 O 3/Cu– Al interface. For Ti containing melts, the final contact angle is achieved already during heating, and an extremely thin layer based on a Ti–Sc–O compound was detected by AES at the Sc 2 O 3/Cu–Ti interface. The results of a thermodynamic analysis, which takes into …

publication date

  • May 1, 2009