Wetting Bahaviour and Reactivity between Liquid Gd and ZrO2 Substrate
J. Min. Metall. Sect. B-Metall. 53 (3) B (2017) 285-293. DOI:10.2298/JMMB170815045T
Full text (pdf)
Export manuscript information:
RIS Format (EndNote, Reference Manager), BibTeX
Abstract
The wetting behavior and reactivity between molten pure Gd and polycrystalline 3YSZ substrate (ZrO2 stabilized with 3 wt% of Y2O3) were experimentally determined by a sessile drop method using a classical contact heating coupled with drop pushing procedure. The test was performed under an inert flowing gas atmosphere (Ar) at two temperatures of 1362 °C and 1412 °C. Immediately after melting (Tm=1341 °C), liquid Gd did not wet the substrate forming a contact angle of θ=141°. The non-wetting to wetting transition (θ 90°) took place after about 110 seconds of interaction and was accompanied by a sudden decrease in the contact angle value to 67°. Further heating of the couple to 1412 °C did not affect wetting (θ=67°±1°). The solidified Gd/3YSZ couple was studied by means of optical microscopy and scanning electron microscopy coupled with X-ray energy dispersive spectroscopy. Structural investigations revealed that the wettability in the Gd/3YSZ system is of a reactive nature associated with the formation of a continuous layerof a wettable reaction product Gd2Zr2O7.
Keywords: Gd; ZrO2; Sessile drop; Wettability; Reactivity; Interfaces
Correspondence Address:
P. Turalska,
Foundry Research Institute,
Krakow, Poland
patrycja.turalska@iod.krakow.pl
This work is licensed under a
Creative Commons Attribution-
ShareAlike 4.0 International License