Wettability, Surface Tension and Work of Adhesion of Cu-Ti Alloys on Yttria Partially-Stabilized Zirconia at 1273K

2014 ◽  
Vol 941-944 ◽  
pp. 102-107 ◽  
Author(s):  
Wei Ji Mao ◽  
Hiroki Sannomiya ◽  
Nobuya Shinozaki ◽  
Toshifumi Ogawa
Keyword(s):  
Surface Tension ◽  
Sessile Drop ◽  
Titanium Content ◽  
Contact Angles ◽  
Sessile Drop Method ◽  
Work Of Adhesion ◽  
Stabilized Zirconia ◽  
Partially Stabilized Zirconia ◽  
Ti Alloys ◽  
Yttria Partially Stabilized Zirconia

The wetting behavior of molten Cu-Ti alloys with titanium content of 10mass%, 20mass% and 30mass% on the Yttria Partially-Stabilized Zirconia (Y-PSZ) substrates was investigated at 1273K using the sessile drop method. The wettability improved with increasing the titanium content of the alloy. The stabilized contact angles of Cu-10mass%Ti, Cu-20mass%Ti and Cu-30mass%Ti alloys on the Y-PSZ substrate were measured to be 69°, 47°and 30°, respectively. The surface tension of the molten Cu-Ti alloys and the work of adhesion of alloy/substrate interface increased with increasing the titanium content. A larger work of adhesion attributes to firmer bonding between the molten Cu-Ti alloy and the Y-PSZ substrate, and can greatly improve the wettability.

Surface Tension Measurement of Liquid Fe-Si-B Alloy by Sessile Drop Method

2013 ◽  
Vol 573 ◽  
pp. 9-12 ◽  
Author(s):  
Kuo Lin Chao ◽  
Shuang Shii Lian ◽  
Chung Yung Wu ◽  
Ku Ling Chang
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Liquid Drop ◽  
Sessile Drop ◽  
Digital Camera ◽  
Contact Angles ◽  
Sessile Drop Method ◽  
Surface Tension Measurement ◽  
Drop Method ◽  
Increasing Temperature

The purpose of this study is to measure contact angle and surface tension of liquid Fe-Si-B alloys at high temperature using sessile drop method. The surface tension and contact angle result is based on sessile drop method by use of a digital camera to take the drop profile and fit the profile by Youngs-Laplace equation. The surface tension of liquid Fe-Si-B alloy and its dependence on temperature has been studied. Contact angles of this liquid alloy on various refractories substrate have been determined using this instrument. The result showed that the contact angles and surface tension of Fe-4Si-3B alloy liquid drop on Al2O3 substrate have value of 134 to 127and 1575-1350 mN/m respectively. The result indicated also that increasing temperature can decrease contact angle and surface tension in Fe-Si-B alloy.

scholarly journals Surface and interfacial properties of Fe-C-O-Cr alloys in contact with alumina

2020 ◽  
Vol 56 (2) ◽  
pp. 143-151
Author(s):  
V. Novák ◽  
L. Řehácková ◽  
P. Váňová ◽  
B. Smetana ◽  
K. Konecná ◽  
...  
Keyword(s):  
Surface Tension ◽  
Sessile Drop ◽  
Chromium Content ◽  
Interfacial Properties ◽  
Sessile Drop Method ◽  
Work Of Adhesion ◽  
Effect Of Temperature ◽  
Sulfur Activity ◽  
Spreading Coefficient ◽  
Surface Active

In this paper, temperature and concentration dependencies on density and surface tension of liquid Fe-C-O-Cr alloys (1.93 - 4.80 wt.% Cr) were investigated in high-temperature resistance observation furnace by a sessile drop method during heating from liquidus temperature to 1600?C. The interfacial characteristics (interfacial tension, wetting angle, work of adhesion, and spreading coefficient) of liquid alloy/alumina system were also determined depending on temperature. The effect of temperature and chromium content on surface and interfacial properties was proven in case of all examined alloys. Based on the fact that the content of surface-active elements such as oxygen (up to 195 ppm) and sulfur (up to 545 ppm) was higher, the influence of activities of both mentioned elements on surface tension of alloy samples was assessed. Particular attention was paid to the dependence of the surface tension temperature coefficient on oxygen and sulfur activity.

Nitriding of yttria-stabilized zirconia in atmospheric pressure microwave plasma

2009 ◽  
Vol 24 (6) ◽  
pp. 2021-2028 ◽  
Author(s):  
R. Milani ◽  
R.P. Cardoso ◽  
T. Belmonte ◽  
C.A. Figueroa ◽  
C.A. Perottoni ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Microwave Plasma ◽  
Plasma Nitriding ◽  
Nitrided Layer ◽  
Zirconium Nitride ◽  
Stabilized Zirconia ◽  
Partially Stabilized Zirconia ◽  
X Ray ◽  
Yttria Partially Stabilized Zirconia

High temperature plasma nitriding of yttria-partially-stabilized zirconia in atmospheric pressure microwave plasma was investigated. The morphological, mechanical, and physicochemical characteristics of the resulting nitrided layer were characterized by different methods, such as optical and scanning electron microscopy, microindentation, x-ray diffraction, narrow resonant nuclear reaction profiling, secondary neutral mass spectrometry, and x-ray photoelectron spectroscopy, aiming at investigating the applicability of this highly efficient process for nitriding of ceramics. The structure of the plasma nitrided layer was found to be complex, composed of tetragonal and cubic zirconia, as well as zirconium nitride and oxynitride. The growth rate of the nitrided layer, 4 µm/min, is much higher than that obtained by any other previous nitriding process, whereas a typical 50% increase in Vickers hardness over that of yttria-partially-stabilized zirconia was observed.

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