Performance of TC4 Titanium Alloys Coated with Different Sol

2009 ◽  
Vol 75 ◽  
pp. 67-70
Author(s):  
Hui Cong Liu ◽  
Li Qun Zhu ◽  
Wei Ping Li
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Titanium Alloys ◽  
Oxidation Resistance ◽  
Anodic Oxidation ◽  
High Temperature Oxidation ◽  
The Other ◽  
Temperature Oxidation ◽  
Insulation Effect ◽  
Zro2 Sol

Titanium alloys has been widely used in many fields, while in high temperature and rigorous corrosive environment, it is very necessary to do some work on the surface of titanium alloys to satisfy with application purpose. In this paper, four kinds of sol film were prepared on titanium alloys with and without anodic oxidation film. The prepared sol included Al2O3, Al2O3-ZrO2 and doped sol by adding additive into them respectively. The film thickness, high temperature oxidation resistance and corrosion resistance after high temperature oxidation for some time were investigated. The results show that the sol film obtained on the anodic oxidation film of titanium alloys is thicker than that without anodic oxidation film. Compared with the other three kinds of film, the doped Al2O3-ZrO2 sol film has the best high temperature oxidation resistance and corrosion resistance due to insulation effect of the sol film, and the composition of additive and zirconic.

Effect of Silicon Sol on Anodic Oxidation Film of Titanium Alloys

2009 ◽  
Vol 75 ◽  
pp. 63-66
Author(s):  
Hui Cong Liu ◽  
Li Qun Zhu ◽  
Wei Ping Li
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Film Thickness ◽  
Titanium Alloys ◽  
Oxidation Resistance ◽  
Anodic Oxidation ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Percentage Difference ◽  
Silicon Sol

In this paper, the anodic oxidation film was prepared in the 1~3mol/L NaAlO2 solution with and without silicon sol added. The film thickness, high temperature oxidation resistance, corrosion resistance, and SEM image, element composition in the film were investigated. The results show that there were obvious improvement in high temperature oxidation resistance and corrosion resistance of the film on titanium alloys after adding silicon sol into the NaAlO2 solution, and with the sol percentage in the solution increased, the foregoing protection abilities of the anodic oxidation film became better, while the film thickness was little affected with the sol percentage difference. The reason was discussed and the effective factor was the silicon composition and more even and compact image in the film.

AK STEEL 441

Alloy Digest ◽  
2006 ◽  
Vol 55 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Ferritic Stainless Steel ◽  
High Temperature Oxidation ◽  
High Temperature Strength ◽  
Temperature Oxidation ◽  
Temperature Performance

Abstract AK Steel 441 has good high-temperature strength, an equiaxed microstructure, and good high-temperature oxidation resistance. The alloy is a niobium-bearing ferritic stainless steel. This datasheet provides information on composition, hardness, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-965. Producer or source: AK Steel.

Oxidation Behaviour of Nickel-Based Alloys Containing High Re Contents Comparable to the Third Generation Nickel-Based Superalloys

2004 ◽  
Vol 449-452 ◽  
pp. 349-352 ◽  
Author(s):  
Yoshinori Murata ◽  
Masahiko Morinaga ◽  
Ryokichi Hashizume
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Oxidation Behaviour ◽  
The Other ◽  
Third Generation ◽  
Temperature Oxidation ◽  
Oxidation Test ◽  
Al Content ◽  
The Third

In order to elucidate the Re effect on oxidation resistance, a high-temperature oxidation test was conducted with two groups of Ni-based superalloys. One group of alloys was characterized by 10mol%Al content (10-Al series). The other group of alloys was characterized by 15mol%Al content (15-Al series). The oxidation resistance decreased clearly with increasing Re content in the 10-Al series alloys, but did not in the 15-Al series alloys.

Study on Properties of Al2TiO5 Coating on Ti-6Al-4V Titanium Alloy

2013 ◽  
Vol 575-576 ◽  
pp. 348-351
Author(s):  
Nian Suo Xie ◽  
Jin Wang
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Sulfuric Acid ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Acid Corrosion ◽  
Temperature Oxidation ◽  
Micro Arc Oxidation ◽  
Sulfuric Acid Corrosion

The Al2TiO5Coating was deposited on Ti-6Al-4V alloy substrate by homemade micro-arc oxidation system. The microstructure of Ti-6Al-4V titanium alloy, the phase of coating, the bonding force of the coating and matrix, sulfuric acid corrosion resistance and high-temperature oxidation resistance were study by inverted microscope model, Xray diffract meter, scanning electron microscopy, the coating adhesion automatic scratch tester, box-type furnace. The results show that the phase of coating is composed of Al2TiO5and Al2SiO5, and Al2TiO5.is the main component, the coating surface consists of discharging pit and flange which are unequal in size, rough and overlap and micro-arc oxidation pit diameter increases with the voltage. When micro-arc oxidation voltage is constant, the longer micro-arc oxidation time, the greater the Ti-6Al-4V alloy coating and the substrate binding force. The corrosion resistance of Ti-6Al-4V alloy was improved in sulfuric acid due to micro-arc oxidation; the sulfuric acid corrosion resistance of the coated samples was improved 11 times when the micro-arc oxidation time increased from 5min to 60min. the high-temperature oxidation resistance of Ti-6Al-4V alloy with micro-arc oxidation coatings is higher than Ti-6Al-4V alloy without micro-arc oxidation coating.

The Effect of DCF on Codeposition of Al and Si by Pack Cementation

2011 ◽  
Vol 239-242 ◽  
pp. 2484-2487
Author(s):  
Jing Hu ◽  
Xian Bo Pan ◽  
Fei Xie ◽  
Song Gao ◽  
Tai Jun Pan
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Heating Temperature ◽  
New Technology ◽  
Total Duration ◽  
Temperature Oxidation ◽  
High Efficient ◽  
1045 Steel

An energy-saving and high-efficient powder Al and Si codeposition process was employed on 1045 steel, the new technology was mainly based on applying direct current field (DCF) with proper parameters between the treated samples and the powder. The microstructure, thickness and the phase constituents of the coating were analyzed by OM and XRD. The high temperature oxidation resistance for a total duration of 120h and the corrosion resistance in 10% H2SO4 for 8h were investigated. The results showed that DCF could lower heating temperature and accelerate the diffusion rate. The phase of the coatings with DCF was composed of Al0.7Fe3Si0.3 and AlFe3. The treated samples had good high temperature oxidation resistance and corrosion resistance in 10% H2SO4 solution.

AK STEEL 18 Cr-Cb HF

Alloy Digest ◽  
2006 ◽  
Vol 55 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Grain Structure ◽  
High Temperature Strength ◽  
Temperature Oxidation ◽  
Equiaxed Microstructure ◽  
Temperature Performance

Abstract AK Steel 18 Cr-Cb HF has an equiaxed microstructure, good high-temperature strength, and good high-temperature oxidation resistance. The alloy was designed to provide improved formability, particularly in multiple forming operations, due in part to a finer final annealed grain structure. This datasheet provides information on composition, hardness, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-960. Producer or source: AK Steel.

Determining High-Temperature Oxidation Resistance of Ti-Al-Cr-Si-N Based Nitride Thin Coatings Deposited on Titanium Alloys

2020 ◽  
Vol 1013 ◽  
pp. 41-45
Author(s):  
Konstantins Savkovs ◽  
Darja Andrejeva
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Heat Resistance ◽  
Titanium Alloys ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Main Element ◽  
Temperature Oxidation ◽  
Thin Coatings

This article considers the possibility of applying thin Ti-Al-Cr-Si-N based nitride thin coatings (up to 10 microns) for increasing the heat-resistance of titanium alloy blades without altering their aerofoil. It presents the results of testing samples, which were coated by using different ratios of the parameters of main element deposition simultaneously from various sputtering sources, as well as an assessment of the efficiency of these coatings in terms of oxidation at temperatures of 750–850°С.

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