Effect of substrate alloy composition on the oxidation behaviour and degradation of aluminide coatings on two Ni base superalloys

2020 ◽  
Vol 167 ◽  
pp. 108494 ◽  
Author(s):  
W. Leng ◽  
R. Pillai ◽  
D. Naumenko ◽  
T. Galiullin ◽  
W.J. Quadakkers
Keyword(s):  
Alloy Composition ◽  
Oxidation Behaviour ◽  
Aluminide Coatings ◽  
Substrate Alloy

Microstructural Features and Oxidation Behaviour of NiCrAlY Coatings Obtained by HVOF Process

2012 ◽  
Vol 585 ◽  
pp. 507-511 ◽  
Author(s):  
Nidhi Rana ◽  
R. Jayaganthan ◽  
Satya Prakash
Keyword(s):  
Gas Turbines ◽  
High Temperature Oxidation ◽  
Parabolic Rate Constant ◽  
Oxidation Behaviour ◽  
Coating System ◽  
Temperature Oxidation ◽  
Hvof Process ◽  
Nicraly Coating ◽  
Oxidation And Corrosion ◽  
Substrate Alloy

NiCrAlY coating system has been widely used for the advanced gas turbines to provide protection against high temperature oxidation and corrosion. Various methods have been used to develop these superalloy coatings. In present investigation, NiCrAlY superalloy coatings have been deposited on the superalloy substrate (Superni76) using commercially available NiCrAlY powder and High Velocity Oxide Fuel (HVOF) process. These coatings have been characterised in terms of their microhardness, porosity, microstructure features and surface roughness. The coatings have been oxidized cyclically (1hour heating and 20minutes cooling) in air at 900οC. The weight change curves have been plotted and the parabolic rate constant has been evaluated. The oxides formed after oxidation has been studied by using various techniques like optical microscopy, FESEM/EDAX and XRD. It has been observed Al¬2O3, NiCr2O4 and Cr2O3 formed upon oxidation of the coatings provide protection to the substrate alloy.

The Effect of Coatings on the Cyclic Oxidation Behaviour of Ti6Al4V at 750°C

2011 ◽  
Vol 393-395 ◽  
pp. 428-435 ◽  
Author(s):  
Ying Yuan Teng ◽  
Qian Chen ◽  
Li Xin
Keyword(s):  
Oxidation Resistance ◽  
Cyclic Oxidation ◽  
Oxidation Behaviour ◽  
Ti6al4v Alloy ◽  
Effective Protection ◽  
Tialsin Coating ◽  
Substrate Alloy

For improvement of the cyclic oxidation resistance of the Ti6Al4V alloy, multi-layered Ti50Al50N/Ti70Al30N and mono-layered Ti60Al30Si10N were deposited on the alloy. It has been found that both coatings provide an effective protection for substrate alloy and the cyclic oxidation resistance of the TiAlSiN coating is better. After cyclic oxidation, it has been found that N diffused into the substrate alloy.

scholarly journals Oxidation behaviour of simple and Pt-modified aluminide coatings on IN738 at 1100 °C

1993 ◽  
Vol 03 (C9) ◽  
pp. C9-511-C9-519 ◽  
Author(s):  
Y. Niu ◽  
W. T. Wu ◽  
D. H. Boone ◽  
J. S. Smith ◽  
J. Q. Zhang ◽  
...  
Keyword(s):  
Oxidation Behaviour ◽  
Aluminide Coatings

Preparation and cyclic oxidation behaviour of Re doped aluminide coatings on a Ni-based single crystal superalloy

2020 ◽  
Vol 164 ◽  
pp. 108354 ◽  
Author(s):  
W. Li ◽  
J. Sun ◽  
S.B. Liu ◽  
Y.D. Liu ◽  
L.B. Fu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Cyclic Oxidation ◽  
Oxidation Behaviour ◽  
Single Crystal Superalloy ◽  
Aluminide Coatings
Sign in / Sign up

Export Citation Format

Share Document