Hot Corrosion Behavior of Arc Ion Plating NiCoCrAlYSiHf Coating Via High-Current Pulsed Electron Beam
- PDF / 2,795,048 Bytes
- 18 Pages / 439.37 x 666.142 pts Page_size
- 88 Downloads / 202 Views
Hot Corrosion Behavior of Arc Ion Plating NiCoCrAlYSiHf Coating Via High‑Current Pulsed Electron Beam Jie Cai1,2 · Zhangkun Zu1,2 · Chen Li1,2 · Peng Lyu3 · Qingfeng Guan3 · Yuxin Li4 Received: 21 July 2020 / Revised: 23 August 2020 / Accepted: 21 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract NiCoCrAlYSiHf coating was prepared for the surface of the 3039 Ni-based superalloy. The coating was prepared via arc ion plating, and it was modified using a highcurrent pulsed electron beam (HCPEB) technique. The effects that HCPEB irradiation had on the hot corrosion properties of the NiCoCrAlYSiHf bonding layer at 900 °C with mixed salt (75 wt% N a2SO4 + 25 wt% K2SO4) were studied. The results showed that after HCPEB irradiation, the defects on the surface of the original coating disappeared, and then the surface remelted. Y-enriched A l2O3 particles formed on the surface after 30 irradiation treatments. The results of the hot corrosion test showed that the original coating had poor hot corrosion resistance and severe spalling of corrosion products and that internal oxidation occurred. A continuous and dense Al2O3 film was expected in the molten salt of the irradiated coating, and this effectively blocked further corrosion of the coating. The results showed that HCPEB irradiation promoted rapid formation of a protective oxide film on the surface of the coating and significantly improved the hot corrosion resistance of the NiCoCrAlYSiHf coating.
* Jie Cai [email protected] 1
Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University, Zhenjiang 212013, China
2
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
3
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
4
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
13
Vol.:(0123456789)
Oxidation of Metals
Graphic Abstract
Keywords NiCoCrAlYSiHf coating · Arc ion plating (AIP) · High-current pulsed electron beam (HCPEB) · Surface modification · Hot corrosion behavior
Introduction With the rapid development of the aviation industry, the inlet temperature of an engine has gotten higher, and simultaneously the working environment has been getting worse. When alloys are used, sulfate impurities (including S, Na, and K) in fuel are deposited on the surface of blades and form deposits, such as Na2SO4. These deposits are in a molten state at high temperature, and thus, turbine blades are vulnerable to hot corrosion damage during service. This leads to component failure and therefore greatly shortens service life. At present, the most effective way to solve
13
Oxidation of Metals
this problem is to deposit a protective coating on the surface of the alloy to improve hot corrosion resistance [1–3]. The MCrAlYX (M = Ni, Co, Ni + Co; X = Si, Hf) coating has good resistance to high-temperature oxidation and hot corrosion and also has good toughness and thermal fatigue resista
Data Loading...
