Aluminum diffusion in aluminide coatings deposited by the CVD method on pure nickel

Calphad ◽  
2014 ◽  
Vol 44 ◽  
pp. 114-118 ◽  
Author(s):  
Jolanta Romanowska
Keyword(s):  
Pure Nickel ◽  
Cvd Method ◽  
Aluminide Coatings

scholarly journals The Ni-Al-Hf Multiphase Diffusion

2016 ◽  
Vol 61 (2) ◽  
pp. 587-592 ◽  
Author(s):  
J. Romanowska ◽  
B. Wierzba ◽  
J. Markowski ◽  
M. Zagula-Yavorska ◽  
J. Sieniawski
Keyword(s):  
Diffusion Coefficients ◽  
Thermodynamic Data ◽  
Pure Nickel ◽  
Experimental Results ◽  
Nickel Aluminum ◽  
Aluminide Coatings ◽  
Multiphase Diffusion

Abstract The generalized Darken method was applied to simulate the diffusion between γ-Ni| γ’-Ni3Al and γ’-Ni3Al|β-NiAl interfaces. The results of calculations were compared with the experimental concentration’s profiles of nickel, aluminum and hafnium in aluminide and hafnium doped aluminide coatings deposited by the CVD and PVD methods on pure nickel. The method deals with the Wagner’s integral diffusion coefficients and thermodynamic data - activities of components. The experimental results agree with the simulated ones.

The Ni-Al-Zr Multiphase Diffusion Simulations

2015 ◽  
Vol 34 (5) ◽  
Author(s):  
Bartek Wierzba ◽  
Jolanta Romanowska ◽  
Maryana Zagula-Yavorska ◽  
Janusz Markowski ◽  
Jan Sieniawski
Keyword(s):  
Mass Transport ◽  
Diffusion Zone ◽  
Quantitative Description ◽  
Pure Nickel ◽  
Phase Volume ◽  
Volume Fractions ◽  
Aluminide Coatings ◽  
Multiphase Diffusion ◽  
Multi Phase ◽  
Diffusion Mass

AbstractThe generalized Darken method allows a quantitative description of diffusion mass transport in multi-phase materials. The method characterizes the diffusion zone by phase volume fractions. The results of the calculations are compared with experimental concentration’s profiles of nickel, zirconium and aluminum in zirconium doped aluminide coatings deposited on pure nickel by the PVD and CVD methods.

Microstructure Investigation of Aluminide Coatings after Platinum Modification Deposited by CVD Method on Inconel 713 LC Ni-Base Superalloy

2011 ◽  
Vol 409 ◽  
pp. 883-888
Author(s):  
M. Yavorska ◽  
Jan Sieniawski ◽  
Ryszard Filip ◽  
Tadeusz Gancarczyk
Keyword(s):  
Diffusion Coating ◽  
Diffusion Treatment ◽  
Cvd Method ◽  
Aluminide Coatings ◽  
Heat Treated ◽  
Two Phases ◽  
Electroplating Process ◽  
Low Activity ◽  
Platinum Electroplating ◽  
Base Superalloy

In the present study, microstructure investigation of aluminide coatings after platinum modification deposited by CVD method on Inconel 713 LC Ni-base superalloys were performed. The platinum coatings 3 and 7 m thick were deposited by electroplating process. The diffusion treatment of platinum electroplating coatings at the temperature 1050 °C was carried out for 2h. The low-activity CVD aluminizing of heat treated coatings at the temperature 1050 °C was conducted for 8 h. On the grounds of the obtained results it was found that microstructure of diffusion treated platinum electroplating coatings 3 m and 7 m thick consisted of two phases: γ-Ni and (Al0.25Pt0.75)Ni3. The low activity CVD aluminizing of diffusion treated platinum electroplating coatings 3 and 7 m thick enables the diffusion coating obtaining. The main constituent of aluminide coatings was (Ni,Pt)Al phase.

The Oxidation Resistance of Nonmodified and Zr-Modified Aluminide Coatings Deposited by the CVD Method

2015 ◽  
Vol 227 ◽  
pp. 361-364
Author(s):  
Ryszard Filip ◽  
Maryana Zagula-Yavorska ◽  
Maciej Pytel ◽  
Jolanta Romanowska ◽  
Mateusz Maliniak ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Oxidation Resistance ◽  
Protective Coating ◽  
Aluminide Coating ◽  
Nickel Superalloy ◽  
Cvd Method ◽  
Aluminide Coatings ◽  
Eds Analysis ◽  
Nial Phase

The aim of the present work was to determine the influence of chemical composition of the protective coating on the oxidation resistance of the protected alloy. Zirconium modified and nonmodified aluminide coatings were deposited on the MAR M200 nickel superalloy by the CVD method. The oxidation tests were conducted at 1100°C into 23 hour in the air. The chemical composition (EDS) analysis was performed. The kinetic of oxidation of zirconium modified and nonmodified aluminide coatings was similar. Oxides inclusions called pegs were observed on the surface of oxidized aluminide coating. HfO2 oxide is more stable than Al2O3 oxide, hafnium atoms can replace aluminum atoms in Al2O3 oxides. This phenomena let to stabilize NiAl phase and increase of oxidation resistance of aluminide coating.

Influence of Coatings Deposition Parameters on Microstructure of Aluminide Coatings Deposited by CVD Method on Ni-Superalloys

2013 ◽  
Vol 197 ◽  
pp. 95-100 ◽  
Author(s):  
Andrzej Nowotnik ◽  
Marek Góral ◽  
Maciej Pytel ◽  
Kamil Dychtoń
Keyword(s):  
Hydrogen Chloride ◽  
Thermodynamic Analysis ◽  
Coating Thickness ◽  
Substrate Material ◽  
Microstructure Analysis ◽  
Preliminary Results ◽  
Cvd Method ◽  
Aluminide Coatings ◽  
Deposition Parameters

The paper presents the preliminary results of technological tests of aluminizing using a new BPX Pro 325 S CVD equipment. Nickel based cast superalloys: IN 738 and MAR M200+Hf were used as a substrate material. The aluminizing processes with different parameters - pressure, HCl flow and time - were conducted. Microstructure analysis showed coatings whose thickness didn't exceed 20 µm. The authors showed that the changes of parameters values in the analyzed range weakly influenced the coating thickness (about 1-2 µm). It was proven, that it was necessary to decrease the flow of hydrogen chloride and perform the thermodynamic analysis.

scholarly journals Zirconium influence on microstructure of aluminide coatings deposited on nickel substrate by CVD method

2013 ◽  
Vol 36 (6) ◽  
pp. 1043-1048 ◽  
Author(s):  
JOLANTA ROMANOWSKA ◽  
MARYANA ZAGULA-YAVORSKA ◽  
JAN SIENIAWSKI
Keyword(s):  
Nickel Substrate ◽  
Cvd Method ◽  
Aluminide Coatings

scholarly journals The Influence of Pd and Zr Co-Doping on the Microstructure and Oxidation Resistance of Aluminide Coatings on the CMSX-4 Nickel Superalloy

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7579
Author(s):  
Jolanta Romanowska ◽  
Jerzy Morgiel ◽  
Maryana Zagula-Yavorska
Keyword(s):  
Oxidation Resistance ◽  
Chemical Vapor ◽  
Nickel Superalloy ◽  
Aircraft Industry ◽  
Co Doping ◽  
Cvd Method ◽  
Aluminide Coatings ◽  
Refractory Elements ◽  
Nial Phase ◽  
Better Than

Pd + Zr co-doped aluminide coatings were deposited on the CMSX-4 nickel superalloy, widely used in the aircraft industry, in order to investigate their microstructure and improvement of oxidation resistance. Palladium was deposited by the electrochemical method, whereas zirconium and aluminum by the chemical vapor deposition (CVD) method. Coatings consist of two zones: the additive and the interdiffusion one. The additive zone contains β–(Ni,Pd)Al phase with some zirconium-rich precipitates close to the coating’s surface, whereas the interdiffusion zone consists of the same β–(Ni,Pd)Al phase with inclusions of refractory elements that diffused from the substrate, so called topologically closed-packed phases. Palladium dissolves in the β–NiAl phase and β–(Ni,Pd)Al phase is being formed. Pd + Zr co-doping improved the oxidation resistance of analysed coatings better than Pd mono-doping. Mechanisms responsible for this phenomenon and the synergistic effect of palladium and zirconium are discussed.

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