Effect of сopper сoating on fibers made of aluminum alloy, titanium, and FeCrAl alloy on surface morphology and activity in CO oxidation

2018 ◽  
Vol 436 ◽  
pp. 1-10 ◽  
Author(s):  
I.V. Lukiyanchuk ◽  
V.S. Rudnev ◽  
M.M. Serov ◽  
B.L. Krit ◽  
G.D. Lukiyanchuk ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Surface Morphology ◽  
Co Oxidation ◽  
Fecral Alloy ◽  
Alloy Titanium

Effect of narrow pulse width laser cleaning on corrosion resistance of A5083-H111 aluminum alloy

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Feisen Wang ◽  
Sifei Ai ◽  
Qian Wang ◽  
Yinfen Cheng ◽  
Haiqi Huang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Surface Morphology ◽  
Elemental Composition ◽  
Pulse Width ◽  
Salt Spray ◽  
Laser Cleaning ◽  
Elemental Distribution ◽  
Content Type ◽  
Poor Area

Purpose The purpose of this paper is to promote the corrosion resistance of the 5083-111H aluminum alloy by laser cleaning. Design/methodology/approach Laser with 2 ns pulse width was adopted in this project and the corrosion resistance of cleaned samples was tested by copper-accelerated salt spray (CASS). The surface morphology, elemental composition and distribution were then characterized by SEM. Moreover, surface morphology, elemental composition and distribution were also tested. Findings Results suggested a higher corrosion resistance was successfully obtained by laser cleaning. Compared with samples cleaned by 2000 grit sandpaper, mechanical cleaning resulted in a 53% larger height difference between the peak and valley. The content of the oxygen is 8.85% on the surface cleaned mechanically and the distribution is dependent on the distribution of aluminum whereas that of the laser cleaning sample is 24.41% and the distribution existed even in the Al-poor area. Originality/value In this project, the 2-ns laser cleaning was proved to have the capability to remove the oxide layer on the aluminum alloy surface while retaining an excellent corrosion resistance and smooth surface. Meanwhile, a thorough elemental distribution and smaller grain size lead to a smaller difference in elemental concentration. This retards the diffusion of oxygen into the substrate and hence increases the corrosion resistance of the surface.

Influence of Voltage Parameters on Formation Process of MAO Ceramic Coating on Aluminum Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 931-936
Author(s):  
Feng Guo ◽  
Rong Ming Liu ◽  
Peng Fei Li
Keyword(s):  
Aluminum Alloy ◽  
Phase Composition ◽  
Surface Morphology ◽  
Formation Process ◽  
Mass Fraction ◽  
Ceramic Coating ◽  
Outer Side ◽  
Thickness Increase ◽  
Negative Voltage ◽  
Positive Voltage

In this paper, the influence of positive and negative voltages to the formation process of ceramic coating on aluminum alloy was studied. The result indicates that, increasing of positive or negative voltage is favorable to the thickness increase and uniformity of the ceramic coating, the thickness of ceramic coating is linear correlation to the positive electrical quantity which is relative to loaded voltages. The ceramic coating is composed of α-Al2O3, γ-Al2O3 and mullite phases, and the voltages, especially negative voltage can increase the mass fraction of α-Al2O3 phase in the outer side of ceramic coating. The effects of voltage parameters on surface morphology of ceramic coating, thickness of ceramic coating and phase composition of ceramic coating is evident, in which the positive voltage is a decisive factor and the negative voltage is an important assistant factor.

scholarly journals Effect of laser deweighting on properties of ZL205A aluminum alloy

2021 ◽  
Vol 2137 (1) ◽  
pp. 012033
Author(s):  
Guang Li ◽  
Zhipeng Wei ◽  
Junlong Wang ◽  
Yangyang Zhang ◽  
Chen Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Aluminum Alloy ◽  
Surface Morphology ◽  
Pulse Laser ◽  
Process Parameters ◽  
Experimental Results ◽  
Matrix Properties ◽  
Before And After ◽  
The Matrix

Abstract In this paper, a nanosecond fiber pulse laser is used to carry out the experimental study on laser weight removal of ZL205A aluminum alloy gyro rotor. By optimizing the process parameters of laser weight removal, better surface morphology was obtained. The effects of surface roughness, metallographic structure and hardness of samples before and after laser deweighting were analyzed. The experimental results show that the laser weight removal does not affect the matrix properties of ZL205A aluminum alloy. The laser de-weight technology is suitable for the balance of ZL205A aluminum alloy gyro rotor.

Numerical Simulation and Surface Morphology of Laser-Cleaned Aluminum Alloy Paint Layer

2019 ◽  
Vol 46 (5) ◽  
pp. 0502002 ◽  
Author(s):  
高辽远 Gao Liaoyuan ◽  
周建忠 Zhou Jianzhong ◽  
孙奇 Sun Qi ◽  
李华婷 Li Huating ◽  
朱明 Zhu Ming ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Surface Morphology ◽  
Paint Layer

Observation of silicon redistribution during TiAl3 formation in aluminum alloy/titanium bilayers

1995 ◽  
Vol 53 ◽  
pp. 438-439
Author(s):  
Roger Alvis ◽  
Paul Besser ◽  
John Sanchez ◽  
Ming Tang
Keyword(s):  
Aluminum Alloy ◽  
Integrated Circuit ◽  
Crystallographic Texture ◽  
Reaction Rate ◽  
High Resistivity ◽  
Current Load ◽  
First Case ◽  
Two Factors ◽  
Alloy Metal ◽  
Alloy Titanium

Titanium is commonly used as an underlayer to aluminum alloy metal lines in integrated circuit applications, primarily for reliability considerations. The Ti/Al bilayer scheme may exhibit improved electromigration resistance as a combined result of two factors. In the first case, should a void form in Al line, the Ti layer would be capable of carrying a part of the increased current load, effectively shunting the current around the void. The second effect that Ti has is the improvement of the (111) crystallographic texture when compared to Al deposited directly on SiO2 (1). However, the fact that Al and Ti react to form the high resistivity intermetallic TiAl3 at temperatures above 350° C, represents a potentially serious limitation to the practical use of this system. One solution is to alloy the aluminum with silicon, which is known to retard the rate of formation of TiAl3 (2). We propose two mechanisms for the decreased reaction rate involving the diffusion of the Si into the TiAl3 where it acts as a barrier to Al diffusion.

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