scholarly journals Deep-Sintered Copper Tracks for Thermal Oxidation Resistance Using Large Pulsed Electron Beam

ACS Omega ◽  
2021 ◽  
Author(s):  
Yunjae Hwang ◽  
Jisoo Kim ◽  
Changyong Yim ◽  
Hyung Wook Park
Keyword(s):  
Electron Beam ◽  
Thermal Oxidation ◽  
Oxidation Resistance ◽  
Pulsed Electron Beam ◽  
Sintered Copper

scholarly journals Enhancing the Oxidation Resistance of NiCrAlY Bond Coat by High-Current Pulsed Electron Beam Irradiation

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 912
Author(s):  
Xianxiu Mei ◽  
Xiaonan Zhang ◽  
Lisong Zhang ◽  
Na Li ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Oxidation Resistance ◽  
Thermal Barrier Coating ◽  
Bond Coat ◽  
Electron Beam Irradiation ◽  
Thermal Barrier ◽  
High Current ◽  
Beam Irradiation ◽  
Pulsed Electron Beam ◽  
Barrier Coating

The bond coat of a NiCrAlY thermal barrier coating plays an important role in solving the thermal expansion mismatch between a metal matrix and a ceramic layer and in improving the oxidation resistance of the whole thermal barrier coating. However, the NiCrAlY bond coat prepared by low-pressure plasma spraying is not conducive to its oxidation resistance because its lamellar structure is loose, porous and the surface is rough. To improve the oxidation resistance of the bond coat, the NiCrAlY bond coat prepared by plasma spraying was modified by high-current pulsed electron beam with different energy densities. Under the electron beam irradiation, the surface of the coating became smooth, and there was a 3–5 μm thick remelting layer on the surface. Under the irradiation, the thickness of the thermal growth oxide layer decreased, and the oxidation resistance was significantly improved, the oxidation product being mainly Al2O3.

Investigation on Oxidation Resistance of NiCoCrAlY Coating Irradiated by High Current Pulsed Electron Beam

2010 ◽  
Vol 654-656 ◽  
pp. 1936-1939 ◽  
Author(s):  
Xian Xiu Mei ◽  
Cun Xia Wang ◽  
Wei Qu ◽  
Ying Qin ◽  
Chuang Dong ◽  
...  
Keyword(s):  
Electron Beam ◽  
Oxidation Resistance ◽  
High Current ◽  
Aluminum Oxides ◽  
Pulsed Electron Beam ◽  
Bond Coats ◽  
Nickel Based Superalloy ◽  
Phase Structures ◽  
Low Pressure Plasma ◽  
Low Pressure Plasma Spraying

In this paper, the NiCoCrAlY bond-coats was deposited onto the DZ4 nickel-based superalloy substrate by using low-pressure Plasma Spraying (LPPS) process, and then the coats were irradiated by high-current pulsed electron beam (HCPEB). Phase structures and microstructure of the HCPEB-treated NiCoCrAlY coating were analyzed by SEM, XRD and EDAX. The present results showed that the coating surface was remelted after HCPEB treatments, became smooth, had crater eruption, and the coating hadn’t produced distinct residual stresses. The results of the isothermal oxidations experiment performed in 900°C static air revealed that the oxidation resistance of the coating was enhanced obviously after HCPEB-treated and the oxides were mainly Aluminum-oxides, but without HCPEB-treated, the oxides of coating also had Nickel-oxides.

Analysis of Desorbed Gases from Oxygen-free Copper Stimulated by Irradiation with Single Pulsed Electron Beam

2012 ◽  
Vol 132 (11) ◽  
pp. 951-957
Author(s):  
Hiroki Kaneko ◽  
Yasushi Yamano ◽  
Shinichi Kobayashi ◽  
Yoshio Saito
Keyword(s):  
Electron Beam ◽  
Pulsed Electron Beam
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