POSSIBILITY OF OBTAINING KESTERITE FILMS BY COMBINING METHODS OF ELECTROLYTIC DEPOSITION OF PRECURSORS AND THEIR SULFURIZATION

We study the performance of the three-node relay network. Three combining methods for the Amplify-and-Forward (AF) protocol and the Decode-and-Forward (DF) protocol are compared. Simulations indicate that the AF protocol is better than DF under all these three combining methods. To combine the incoming signals the channel quality should be estimated as accuracy as possible, more estimation accuracy requires more resource. A very simple combining method can obtain the performance comparative with optimal combining methods approximately. At the same time, all three combining methods for both diversity protocols can achieve the maximum diversity order.

Download Full-text

Considerations on the Specific Phenomena in Metal Heating when Using Electrolytic Plasma

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.660.150 ◽

2015 ◽

Vol 660 ◽

pp. 150-154

Author(s):

Daniel Hriţcu ◽

Margareta Lupu-Poliac ◽

Mihai Hatmanu ◽

Elena Raluca Baciu ◽

Constantin Baciu ◽

...

Keyword(s):

Aqueous Solutions ◽

Rapid Heating ◽

Metal Electrode ◽

Electrolytic Deposition ◽

Electrochemical System ◽

Heat Flows ◽

Electrode Processes ◽

Metal Processing ◽

Plasma Electrolytic ◽

Theoretical Considerations

Discovered in 1930, metal processing by electrolysis processes in aqueous solutions, are being intensely studied starting with 1960, so that now they have a wide diversity and industrial applicability. The present paper illustrates some theoretical considerations regarding specific electrode processes of the aqueous solutions electrolysis and the I=f (U) characteristics of the Me/VGS/E electrochemical system thus establishing the forming conditions of electrolytic plasma (PE). The continuous and stable character of the deposited layer (VGS) and of the shell formed by the electrolytic plasma will contribute to the rapid heating of the metal electrode, under the influence of the three heat flows qa, ql and qs. Plasma electrolytic saturation phenomena (PES) and the formation of oxides on the metal surface (PEO), represent the two main directions of plasma electrolytic deposition (PED).

Download Full-text

Preparation of Mn doped Al2O3 heat-dissipating coatings on titanium alloy by cathodic plasma electrolytic deposition

Vacuum ◽

10.1016/j.vacuum.2018.10.019 ◽

2019 ◽

Vol 159 ◽

pp. 228-234 ◽

Cited By ~ 4

Author(s):

Zhikai Liu ◽

Qiu Sun ◽

Ying Song ◽

Hairui Wang ◽

Xiangqun Chen ◽

...

Keyword(s):

Titanium Alloy ◽

Electrolytic Deposition ◽

Cathodic Plasma ◽

Plasma Electrolytic ◽

Mn Doped

Download Full-text

Effect of Duty Cycle on Properties of Al2O3 Ceramic Coatings Fabricated on TiAl Alloy via Cathodic Plasma Electrolytic Deposition

Materials ◽

10.3390/ma11101962 ◽

2018 ◽

Vol 11 (10) ◽

pp. 1962 ◽

Cited By ~ 1

Author(s):

Shaoqing Wang ◽

Faqin Xie ◽

Xiangqing Wu ◽

Jixiang An

Keyword(s):

Electron Microscopy ◽

Wear Resistance ◽

Heat Resistance ◽

Duty Cycle ◽

Tial Alloy ◽

Ceramic Coatings ◽

Electrolytic Deposition ◽

Al2o3 Ceramic ◽

Cathodic Plasma ◽

Plasma Electrolytic

In order to study the effect of duty cycle during the cathodic plasma electrolytic deposition (CPED) process, Al2O3 ceramic coatings were fabricated via the CPED technique on prepared TiAl alloy in an Al(NO3)3 electrolyte with different duty cycles. Microstructure, morphology, and chemical compositions of coatings were analyzed by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The mechanical properties, such as thickness, hardness, and binding strength, were also characterized, and heat-resistance and wear-resistance tested. The results indicated that duty cycle mainly affected the relative crystallinity of CPED coatings. As the duty cycle increased, the crystallinity of CPED coatings increased, the content of Al(OH)3 and γ-Al2O3 decreased, and the content of α-Al2O3 increased. The thickness and bonding strength both increased firstly and then decreased, while hardness increased as duty cycle increased. Heat-resistance and wear-resistance of TiAl alloy with CPED coating was highly improved compared to that of TiAl alloy substrate without CPED coating.

Download Full-text