Evaluation of three kinds of MCrAlY coatings produced by electrospark deposition

2016 ◽  
Vol 26 (6) ◽  
pp. 1647-1654 ◽  
Author(s):  
Yu-jiang XIE ◽  
De WANG ◽  
Ming-sheng WANG ◽  
Wei YE
Keyword(s):  
Electrospark Deposition ◽  
Mcraly Coatings

scholarly journals Preparation of MCrAlY–Al2O3 Composite Coatings with Enhanced Oxidation Resistance through a Novel Powder Manufacturing Process

2019 ◽  
Vol 28 (3) ◽  
pp. 433-443 ◽  
Author(s):  
Mingwen Bai ◽  
Bo Song ◽  
Liam Reddy ◽  
Tanvir Hussain
Keyword(s):  
Oxidation Resistance ◽  
Manufacturing Process ◽  
Composite Powder ◽  
Composite Coatings ◽  
Submicron Particles ◽  
Second Phase ◽  
Mcraly Coatings ◽  
Powder Feedstock ◽  
Enhanced Oxidation ◽  
Powder Manufacturing

Abstract MCrAlY–Al2O3 composite coatings were prepared by high-velocity oxygen fuel thermal spraying with bespoke composite powder feedstock for high-temperature applications. Powder processing via a suspension route was employed to achieve a fine dispersion of α-Al2O3 submicron particles on the MCrAlY powder surface. This was, however, compromised by ~ 50% less flowability of the feedstock during spraying. Nevertheless, the novel powder manufacturing process introduced in this study has shown potential as an alternative route to prepare tailored composite powder feedstock for the production of metal matrix composites. In addition, the newly developed MCrAlY–Al2O3 composite coatings exhibited superior oxidation resistance, compared to conventional MCrAlY coatings, with the formation of nearly exclusively Al2O3 scale after isothermal oxidation at 900 °C for 10 h. The addition of α-Al2O3 particles in the MCrAlY coatings as a second phase was found to have promoted the formation of YAG oxides (YxAlyOz) during spraying and also accelerated the outwards diffusion of Al, which resulted in enhanced oxidation resistance.

Tic-Ni-based composite materials dispersion-strengthened by nanoparticles for electrospark deposition

2008 ◽  
Vol 49 (5) ◽  
pp. 397-403 ◽  
Author(s):  
E. A. Levashov ◽  
Yu. S. Pogozhev ◽  
A. E. Kudryashov ◽  
S. I. Rupasov ◽  
V. V. Levina
Keyword(s):  
Composite Materials ◽  
Electrospark Deposition

Characteristics of electrospark deposition of a nickel-based alloy on 410 stainless steel for purpose of facilitating dissimilar metal welding by laser

2016 ◽  
Vol 87 (9-12) ◽  
pp. 2821-2828 ◽  
Author(s):  
Seyed Hamzeh Baghjari ◽  
Farshid Malek Ghaini ◽  
Hamid Reza Shahverdi ◽  
Mohammad Ebrahimnia ◽  
Carlo Mapelli ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electrospark Deposition ◽  
Dissimilar Metal ◽  
Dissimilar Metal Welding ◽  
Nickel Based Alloy ◽  
Metal Welding

Study on the Oxidation Behavior of LPPS MCrAlY Coatings at High Temperature: Part II Coating Microstructure Development

2021 ◽  
Vol 1035 ◽  
pp. 584-590
Author(s):  
Kang Yuan ◽  
Zhao Ran Zheng
Keyword(s):  
High Temperature ◽  
Thermodynamic Simulation ◽  
Thermal Barrier ◽  
Microstructure Development ◽  
Temperature Oxidation ◽  
Bond Coats ◽  
Β Phase ◽  
Mcraly Coatings ◽  
Coating Microstructure ◽  
Simulation Results

MCrAlY can be used as bond coats for thermal barrier coatings (TBCs) with good ductility and excellent resistance against high temperature oxidation and hot corrosion. The behavior of the microstructure development in the MCrAlY coatings plays a key role on the oxidation resistance. In this paper, the microstructure in the coatings oxidized at 750~1100 °C was analyzed. The formation of the phases and their fraction were studied by comparing thermodynamic simulation results with the experimental observations. At higher temperatures (>1000 °C) β-to-γ’-to-γ phase transformation took place while at lower temperatures (<1000 °C) β phase would transfer to γ directly. The results show that the simulation can semi-quantitatively predict the microstructure formed in the coating.

scholarly journals Electrospark deposition of Al2O3–TiB2/Ni composite-phase surface coatings on Cu–Cr–Zr alloy electrodes

2015 ◽  
Vol 3 (1) ◽  
pp. 103-107 ◽  
Author(s):  
Ping Luo ◽  
Shijie Dong ◽  
Anzhuo Yangli ◽  
Shixuan Sun ◽  
Zhong Zheng ◽  
...  
Keyword(s):  
Surface Coatings ◽  
Electrospark Deposition ◽  
Phase Surface ◽  
Zr Alloy
Sign in / Sign up

Export Citation Format

Share Document