TY - JOUR

T1 - Wetting behavior and reactivity between liquid Gd and ZrO2 substrate

AU - Turalska, P.

AU - Homa, M.

AU - Bruzda, G.

AU - Sobczak, N.

AU - Kaban, Ivan

AU - Mattern, Norbert

AU - Eckert, Jürgen

PY - 2017/11/13

Y1 - 2017/11/13

N2 - The wetting behavior and reactivity between molten pure Gd and polycrystalline 3YSZ substrate (ZrO2 stabilized with 3wt% of Y2O3) were experimentally determined by a sessile drop method using a classical contact heating coupled with droppushing procedure. The test was performed under an inert flowing gas atmosphere (Ar) at two temperatures of 1362 °C and1412 °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 bya 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 coupledwith X-ray energy dispersive spectroscopy. Structural investigations revealed that the wettability in the Gd/3YSZ system isof a reactive nature associated with the formation of a continuous layer of a wettable reaction product Gd2Zr2O7.

AB - The wetting behavior and reactivity between molten pure Gd and polycrystalline 3YSZ substrate (ZrO2 stabilized with 3wt% of Y2O3) were experimentally determined by a sessile drop method using a classical contact heating coupled with droppushing procedure. The test was performed under an inert flowing gas atmosphere (Ar) at two temperatures of 1362 °C and1412 °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 bya 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 coupledwith X-ray energy dispersive spectroscopy. Structural investigations revealed that the wettability in the Gd/3YSZ system isof a reactive nature associated with the formation of a continuous layer of a wettable reaction product Gd2Zr2O7.

U2 - 10.2298/JMMB170815045T

DO - 10.2298/JMMB170815045T

M3 - Article

VL - 53.2017

SP - 285

EP - 293

JO - Journal of Mining and Metallurgy, Section B: Metallurgy

JF - Journal of Mining and Metallurgy, Section B: Metallurgy

SN - 1450-5339

IS - 3

ER -