The Influence of Surface Preparation Method on Microstructure of HF-Modified Aluminide Coatings Deposited by CVD Method on Rene 80 and MAR M-247 Nickel Superalloys

2016 ◽  
Vol 844 ◽  
pp. 177-180
Author(s):  
Ryszard Filip ◽  
Maciej Pytel ◽  
Andrzej Nowotnik
Keyword(s):  
Vapour Deposition ◽  
Base Alloy ◽  
Aluminide Coating ◽  
Chemical Vapour ◽  
Surface Preparation ◽  
Substrate Thickness ◽  
Nickel Superalloys ◽  
Average Amount ◽  
Cvd Method ◽  
Aluminide Coatings

In the article the hafnium modified aluminide coatings deposited using chemical vapour deposition (CVD) method were analyzed. The influence of surface treatment (grinding, sandblasting with different pressures) on microstructure of coatings were described. The Re 80 and M-247 nickel superalloys were used as substrate. Thickness of the obtained aluminide coating was in the range 32-45 mm on Re 80 and 40-45 mm on M-247 respectively. The average amount of Al in the additive layer was 22-24 wt% on Re 80 and about 21 wt % on M-247 base alloy. The total amount of hafnium in coatings did not exceed 2.5 wt % - usuallly below 0.5 wt %. The conducted research has shown that there is no strong influence of surface preparation methodology on microstructure of aluminide coatings obtained by CVD method.

The Microstructure of Hafnium Modified Aluminide Coatings Deposited by CVD Method

2016 ◽  
Vol 844 ◽  
pp. 172-176
Author(s):  
Marek Góral ◽  
Maciej Pytel ◽  
Ryszard Filip ◽  
Andrzej Nowotnik
Keyword(s):  
Vapour Deposition ◽  
Aluminide Coating ◽  
Microstructural Analysis ◽  
Chemical Vapour ◽  
Deposition Process ◽  
Substrate Material ◽  
Process Time ◽  
Cvd Method ◽  
Aluminide Coatings ◽  
A Chain

The paper presents results of microstructural analysis of Hf-modified aluminide coatings. The coating was obtained using chemical vapour deposition (CVD) method at 1040°C using BPX-Pro 325 S equipment (Iond Bond). The deposition process time was 960 mintutes. The IN-718, IN-100 as well as CMSX-4 single-crystal nickel superalloys were the substrate material. The observation of coating was carried out using scanning electron microscopy. Chemical composition was analyzed using EDS method. The results showed that hafnium accumulates mainly on diffusion/additive layer interface and forms a „chain” of small precipitations. Hafnium was found in the additive NiAl layer of aluminide coating deposited on IN-100 superalloy. Its amount did not exceed 0.3 at %.

The Influence of Long-Term Heat Treatment on Microstructure of Zr-Modified Aluminide Coating Deposited by CVD Method on MAR M200+Hf Nickel Superalloy

2013 ◽  
Vol 592-593 ◽  
pp. 469-472 ◽  
Author(s):  
Ryszard Filip ◽  
Marek Góral ◽  
Marcin Zawadzki ◽  
Andrzej Nowotnik ◽  
Maciej Pytel
Keyword(s):  
Heat Treatment ◽  
Aluminide Coating ◽  
Chemical Vapour ◽  
Nickel Superalloy ◽  
Phase Changes ◽  
Vacuum Furnace ◽  
Aluminide Coatings ◽  
Nial Phase ◽  
Main Component

The article presents the investigation of influence of long-term annealing of Zr modified aluminide coatings on its microstructure. The coatings were deposited by Chemical Vapour Deposition on MAR M200+Hf nickel superalloy. Annealing was carried out in a vacuum furnace at the temperature 1020°C within the period of 12, 16 and 20 hours respectively. The microstructral analysis was carried out using Hitachi S-3400 scanning electron microscope. Phase changes in the aluminide layer were observed, particularly the NiAl phase into Ni3Al. Changes in thickness of individual layers in the coating were observed. Conducted research showed that there is no influence of Zr on structure of the aluminide coating during annealing. The structure changes are similar to observed in simple aluminide coating. The maximum time of heat treatment without significant influence on structure of aluminide coating is 16 hours. After that time the main component of coating is NiAl phase.

Characterisation of Ni-C films obtained in PVD/CVD process

Open Physics ◽  
2011 ◽  
Vol 9 (2) ◽  
Author(s):  
Justyna Kęczkowska
Keyword(s):  
Thin Films ◽  
Technological Process ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Step Method ◽  
Raman Spectrometry ◽  
Two Phase ◽  
Cvd Method ◽  
The Matrix ◽  
Multiwall Nanotubes

AbstractThe work presents the results of the scanning electron microscopy (SEM) and Raman spectrometry studies of carbonaceous nanostructures containing nickel nanocrystallites. The films were obtained using a two-step method. In the first phase the Physical Vapour Deposition (PVD) method was applied, whereas in the second Chemical Vapour Deposition (CVD) method was used. The paper presents results for samples with various Ni content obtained with different parameters of the two-phase technological process. The research confirms that the thin films obtained by PVD method contain Ni nanocrystallites distributed in a carbonaceous matrix. The matrix is composed of various carbon allotropes (amorphous carbon, graphite, fullerene). The thin films made by CVD method make a matrix when multiwalled, carbonaceous nanotubes are obtained. Depending on the technological process parameters of each phase, we obtain multiwall nanotubes with a various degree of defects.

Synthesis and formation mechanism of twinned SiC nanowires made by a catalyst-free thermal chemical vapour deposition method

RSC Advances ◽  
2014 ◽  
Vol 4 (35) ◽  
pp. 18360-18364 ◽  
Author(s):  
Zhaohui Huang ◽  
Haitao Liu ◽  
Kai Chen ◽  
Minghao Fang ◽  
Juntong Huang ◽  
...  
Keyword(s):  
Silicon Wafer ◽  
Chemical Vapour Deposition ◽  
Formation Mechanism ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Deposition Method ◽  
Cvd Method ◽  
Catalyst Free ◽  
Sic Nanowires ◽  
Chemical Vapour Deposition Method

Twinned SiC nanowires were prepared on a silicon wafer by a simple catalyst-free thermal chemical vapour deposition (CVD) method.

scholarly journals Tribological studies on bearings coated with titanium carbo-nitride (TiCN) using chemical vapour deposition (Cvd) method

2018 ◽  
Vol 16 (4) ◽  
Author(s):  
N. R. Banapurmath ◽  
Monisha R. Tungal ◽  
Shankar A. Hallad ◽  
Komal Swaroop Kaladagi ◽  
Nandish B. Angadi ◽  
...  
Keyword(s):  
Chemical Vapour Deposition ◽  
Vapour Deposition ◽  
Testing Machine ◽  
Chemical Vapour ◽  
Vital Role ◽  
Coating Material ◽  
Titanium Carbonitride ◽  
Wear Testing ◽  
Wear Rates ◽  
Cvd Method

The present work mainly focus on the development of a coating material for bearing applications using Chemical Vapour Deposition (CVD) method. The presence of coatings and surface topography play a vital role in the tribological performance of sliding components such as bearing. The coating used should reduce friction as well as wear of the components. An attempt has been made to develop a coating material that is provided on bearings in order to facilitate wear-resisting property improving the bearing properties significantly. Titanium Carbonitride TiCN is an extensively used material on tools used for abrasive cutting and machining operations, but still not used as a coating material in bearing applications. In this direction, (TiCN), an abrasion resistant ceramic coating was formed by adding a small amount of carbon to the Titanium Nitride (TiN) and the developed coating was applied on the bearings in the form of a thin film of 3 μm thickness. The carbon makes the coating harder and thereby provides a lower friction coefficient. Specimens were developed as per ASTM standards with size 10 x 10 x 20mm with and without coating material. The coated specimens were tested on Pin-on-disc wear testing machine and a comparative study between the TiCN coated bearing and the conventional bearing was carried out in terms of wear rates determination. SEM and EDAX analysis was also carried out for the tested specimens to ensure proper distribution of carbon in TiN. From the study it was found that the coated material showed lesser wear rate by 21% when compared to the conventional uncoated specimen and SEM showed proper bonding between the carbon and TiN.

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.

Effect of Calcination and Reduction Process on MWCNT Growth during Synthesizing MWCNT-Alumina Hybrid as Composite Reinforcement

2011 ◽  
Vol 364 ◽  
pp. 475-479 ◽  
Author(s):  
Muhammad Helmi Abdul Kudus ◽  
Md Akil Hazizan ◽  
Mohamad Hasmaliza
Keyword(s):  
Carbon Nanotube ◽  
Chemical Vapour Deposition ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Reduction Process ◽  
Multiwall Carbon Nanotube ◽  
Hybrid Compound ◽  
Cvd Method ◽  
Multiwall Carbon ◽  
Composite Reinforcement

Multiwall carbon nanotube (MWCNT) and alumina hybrid compound prepared via chemical vapour deposition (CVD). The CVD process always reported that the catalyst must undergo calcinations and reduction process before growing the carbon nanotube (CNT). In this work, MWCNT-alumina hybrid was successfully synthesized via simple CVD method. The morphologies study showed that the MWCNT-alumina hybrid with calcination and reduction, and calcination without reduction has been successfully synthesized.

Synthesis and Growth Mechanism of Catalyst-Free ZnO Nanowires Using Chemical Vapour Deposition

2012 ◽  
Vol 620 ◽  
pp. 320-324 ◽  
Author(s):  
Nur Atiqah Binti Hamzah ◽  
Swee Yong Pung ◽  
Srimala Sreekantan ◽  
Siti Nor Qurratu Aini Binti Abd Aziz
Keyword(s):  
Chemical Vapour Deposition ◽  
Vapour Deposition ◽  
Free Exciton ◽  
Chemical Vapour ◽  
Silicon Substrates ◽  
Cvd Method ◽  
Catalyst Free ◽  
Uv Emission ◽  
Zinc Oxides ◽  
Vs Mechanism

Zinc oxides nanowires (ZnO NWs) were successfully synthesized on bare silicon substrates using Chemical vapour deposition (CVD) method without foreign catalyst. The ZnO NWs had good crystal quality as they exhibited a strong UV emission (373 nm) corresponding to the free exciton emission and a weak green arising from defect-related emission in PL measurement. Measurement of low temperature photoluminescence spectra show a peak of free exciton and defect bound excitons. The growth of these catalyst-free ZnO NWs was governed by Vapour-Solid (VS) mechanism.

The Influence of Deposition Process on Structure of Platinum-Modifed Aluminide Coatings O Ni-Base Superalloy

2011 ◽  
Vol 465 ◽  
pp. 247-250 ◽  
Author(s):  
Lucjan Swadźba ◽  
Ginter Nawrat ◽  
Boguslaw Mendala ◽  
Marek Goral
Keyword(s):  
Protective Coatings ◽  
Base Alloy ◽  
Turbine Blades ◽  
Chemical Vapour ◽  
Base Material ◽  
Deposition Process ◽  
Pack Cementation ◽  
Aluminide Coatings ◽  
Platinum Layer ◽  
Base Superalloy

The modern jet engines used in commercial and military aircrafts are characterized by operating temperature in turbine section above 1000oC. The Ni-base superalloy turbine blades and vanes working in high temperature in very aggressive environment require using of protective coatings. The aluminide coatings are widely used to protect this engine parts. The pack cementation, out of pack and chemical vapour deposition (CVD) technologies are usually used to produce this type of coating. The aluminide coatings can be modified by platinum or other elements. The Pt-modified aluminide coatings are characterized by better oxidation and corrosion resistance in comparison with conventional aluminide coatings and can be used as a bond coat for Thermal Barrier Coatings deposited by EB-PVD technology. In present study the influence of deposition technology and their’s parameters on structure and chemical composition of Pt-aluminide coatings are presented. The base material for coatings was a Inconel 738 Ni-base superalloy. The first step of coatings production were Pt electroplating with different thickness of platinum layer. The second step of coating production was aluminising process. The aluminide coatings were produced by pack cementation and out of pack technologies. Additional the influence of heat treatment of base alloy with coatings was investigated. The structure of all deposited coatings was observed by scanning electron microscopy and the chemical and phase composition of coatings were investigated by EDS and XRD methods. The observed coatings were characterized by two types of structure: first based on NiAlPt phase obtained on thin Pt layer and the second with additional presence of PtAl2 phase on the thick Pt layer.

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