Formation and Oxidation Behavior of a Diffusion-Barrier-Coating System on a Ni–Mo base Alloy at 1,373 K in Air

2007 ◽  
Vol 68 (5-6) ◽  
pp. 331-342 ◽  
Author(s):  
Yuichi Katsumata ◽  
Takayuki Yoshioka ◽  
Kemas Zaini Thosin ◽  
Takumi Nishimoto ◽  
Takeshi Izumi ◽  
...  
Keyword(s):  
Diffusion Barrier ◽  
Oxidation Behavior ◽  
Base Alloy ◽  
Coating System ◽  
Barrier Coating

Oxidation Behavior of Nickel-Base Single-Crystal Superalloy with Rhenium-Base Diffusion Barrier Coating System at 1,423 K in Air

2007 ◽  
Vol 68 (5-6) ◽  
pp. 343-363 ◽  
Author(s):  
Toshio Narita ◽  
Fengqun Lang ◽  
Kemas Zaini Thosin ◽  
Takayuki Yoshioka ◽  
Takeshi Izumi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffusion Barrier ◽  
Oxidation Behavior ◽  
Single Crystal Superalloy ◽  
Coating System ◽  
Barrier Coating ◽  
Nickel Base

The Effect of an Applied External Tensile Stress on the Oxidation Behavior of a Nickel-Base Alloy with a Re-base Diffusion-barrier-coating

2007 ◽  
Vol 68 (5-6) ◽  
pp. 295-311 ◽  
Author(s):  
Mikihiro Sakata ◽  
Shigenari Hayashi ◽  
Takumi Nishimoto ◽  
Takayuki Yoshioka ◽  
Toshio Narita
Keyword(s):  
Tensile Stress ◽  
Diffusion Barrier ◽  
Oxidation Behavior ◽  
Base Alloy ◽  
Nickel Base Alloy ◽  
Barrier Coating ◽  
Nickel Base

Formation and Oxidation Behavior of Diffusion-Barrier-Coating System on γ-TiAl

2019 ◽  
Vol 33 (30) ◽  
pp. 17-22 ◽  
Author(s):  
Zbigniew Żurek ◽  
Adam Stawiarski ◽  
Artur Jaroń ◽  
Aleksander Gil
Keyword(s):  
Diffusion Barrier ◽  
Oxidation Behavior ◽  
Coating System ◽  
Barrier Coating

Improvement of oxidation-resistance of NiCrAlY coatings by application of CrN or CrON interlayer

2008 ◽  
Vol 23 (2) ◽  
pp. 341-352 ◽  
Author(s):  
W.Z. Li ◽  
Y. Yao ◽  
Q.M. Wang ◽  
Z.B. Bao ◽  
J. Gong ◽  
...  
Keyword(s):  
Diffusion Barrier ◽  
Oxidation Behavior ◽  
Isothermal Oxidation ◽  
Coating System ◽  
Effective Protection ◽  
Rapid Degradation ◽  
Crn Coating ◽  
Ion Plating ◽  
Oxidation Performance ◽  
Better Than

NiCrAlY coatings with and without CrN or CrON interlayer as diffusion barrier were deposited on superalloy DSM11 by arc ion plating (AIP). The oxidation performance of the coating systems was evaluated by isothermal oxidation tests at 1100 °C for 100 h. The element interdiffusion and oxidation behavior of the coating systems were described. It was found that the NiCrAlY coatings provided protective effect for the DSM11 substrate. However, serious interdiffusion between the coatings and substrate resulted in rapid degradation of the coatings. The addition of CrN or CrON interlayer between the coatings and substrate markedly decreased the interdiffusion. CrON interlayer performed better than CrN interlayer, which was attributed to the excellent diffusion barrier ability of Al2O3 layer formed in the interlayer at high temperature. Also, the NiCrAlY/CrON coating system exhibited more effective protection for DSM11 than the NiCrAlY/CrN coating system.

Formation of Pt-Modified γ’-Ni3Al and Re-Based σ-Alloy Coating System and Cyclic Oxidation Behavior of Coated Superalloy

2008 ◽  
Vol 595-598 ◽  
pp. 135-141 ◽  
Author(s):  
Toshio Narita ◽  
Stewart Ford ◽  
Takayuki Yoshioka ◽  
Takumi Nishimoto ◽  
Takeshi Izumi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Cyclic Oxidation ◽  
Oxidation Behavior ◽  
Parabolic Rate Constant ◽  
Alloy Coating ◽  
Coating System ◽  
Barrier Coating ◽  
Coated Alloy ◽  
Α Al2o3 ◽  
Slow Growing

A duplex layer, outer Pt-modified γ’-Ni3Al + γ-Ni and inner multi-barrier σ- Re(Cr,Ni,W), coating system was formed on a Ni-based single crystal 4th generation superalloy. Oxidation behavior of the coated alloy was investigated under thermo-cycling conditions, and analyzed by EPMA and XRD. During cyclic oxidation 1hr at 1100°C and 20 min at room temperature, a slow growing α-Al2O3 formed for up to 400 cycles and its spallation was rare. The parabolic rate constant of mass change was 6.3x10-16 kg2m-4s-1. The Pt-modified γ’-Ni3Al + γ-Ni contained 19Al, 12Pt, 4Cr, and 3Co in at%, and their concentration profiles were almost flat across the outer layer. The multi-barrier, σ-Re(Cr,Ni,W) contained 40Re, 23Cr, 17Ni, 7Al, 4W, 3.5Mo, and 3Co in at%. Furthermore, the γ’-Ni3Al containing Pt was newly formed between the multibarrier and bulk alloy substrate. It was concluded that the σ-Re(Cr,Ni,W) is compatible with the Ptmodified γ’-Ni3Al in the multi-diffusion barrier coating on Ni-based single crystal, 4th generation superalloy at high temperatures.

The Role of Bond Coat in Advanced Thermal Barrier Coating

2005 ◽  
Vol 502 ◽  
pp. 99-104 ◽  
Author(s):  
Toshio Narita ◽  
Shigenari Hayashi ◽  
Feng Qun Lang ◽  
Kemas Zaini Thosin
Keyword(s):  
Diffusion Barrier ◽  
Bond Coat ◽  
Sigma Phase ◽  
Oxidation Behavior ◽  
Layer Structure ◽  
Thermal Barrier ◽  
Outward Diffusion ◽  
Hastelloy X ◽  
Barrier Coating

A novel diffusion barrier bond coat with a duplex layer structure, a sigma phase Re-Cr-Ni barrier and Ni aluminides as an aluminum reservoir was formed on a Ni based superalloy (TMS 82+) and Hastelloy X. The oxidation behavior of both alloys with and without the sigma- Re-Cr-Ni -phase as a diffusion barrier was investigated at temperatures of 1373K (Hastelloy X) and 1423K (TMS-82+) for up to 360ks. It was found that the Re-Cr-Ni acts as a diffusion barrier for both inward diffusion of Al and outward diffusion of alloying elements in the alloy substrate.

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