scholarly journals Surface Microstructure of Nanoaluminized CoCrAlY Coating Irradiated by HCPEB

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Zhiyong Han ◽  
Jian Han ◽  
Zhenzhu Jing
Keyword(s):  
Electron Beam ◽  
Plasma Spray ◽  
Aluminum Film ◽  
Surface Microstructure ◽  
Air Plasma Spray ◽  
High Current ◽  
Vacuum Deposition ◽  
Air Plasma ◽  
Pulsed Electron Beam ◽  
Original Coating

A thermal sprayed CoCrAlY coating was prepared by air plasma spray on the surface of Ni-based superalloy GH4169; then, a nanoscale aluminum film was deposited with electron beam vacuum deposition on it. The coatings irradiated by high-current pulsed electron beam were investigated. After HCPEB treatment, the Al film was remelted into the bond coat. XRD result shows that Al and Al2O3phase were recorded in the irradiated and aluminized coatings, while Co-based oxides which originally existed in the initial samples disappeared. Microstructure observations reveal that the original coating with porosity, cavities, and inclusions was significantly changed after HCPEB treatment as compact appearance of interconnected bulged nodules. Moreover, the grains on the irradiated coating were very refined and homogeneously dispersed on the surface, which could effectively inhibit the corrosive gases and improve the coating oxidation resistance.

Modifications of Surface Microstructure and Properties Induced by High Current Pulsed Electron Beam (HCPEB) Treatments of Intermetallics

2006 ◽  
Vol 980 ◽  
Author(s):  
Thierry Grosdidier ◽  
Jianxin Zou ◽  
Gang Ji ◽  
Kemin Zhang ◽  
Xiangdong Zhang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Surface Hardening ◽  
Thermal Stresses ◽  
Protective Layer ◽  
Surface Modifications ◽  
Surface Microstructure ◽  
High Current ◽  
Present Contribution ◽  
Pulsed Electron Beam ◽  
Heating Mode

AbstractHigh current pulsed electron beam (HCPEB) is a fairly new technique for surface modifications. The present contribution reviews some recent insights on the microstructure modifications encountered at the top surface of HCPEB treated (NiTi and FeAl) intermetallics. In particular, the potential of the technique for structure modifications associated with the use of the pulsed electron beam under “heating” and “melting” conditions is highlighted. The interesting surface modifications include the creation of an homogeneous protective layer under the melting mode while thermal stresses under the heating mode can induce surface hardening and stress enhanced rapid solid state alloying.

Low Energy High Current Pulsed Electron Beam (LEHCPEB) Treatment: An Effective Way for Improving Surface Microstructure and Properties

2010 ◽  
Vol 636-637 ◽  
pp. 1091-1096
Author(s):  
Thierry Grosdidier ◽  
Jian Xin Zou ◽  
K.M. Zhang ◽  
Sheng Zhi Hao ◽  
Chuang Dong
Keyword(s):  
Electron Beam ◽  
Surface Modifications ◽  
Metastable Phases ◽  
Low Energy ◽  
Surface Microstructure ◽  
High Current ◽  
Present Contribution ◽  
Corrosion Properties ◽  
Pulsed Electron Beam ◽  
Wear And Corrosion

Low energy high current pulsed electron beam (LEHCPEB) is a fairly new technique for surface modifications, including hardening, alloying and formation of metastable phases as well as improvement in wear and corrosion properties. The present contribution gives some new insights on the microstructure modifications encountered at the top surface of HCPEB treated metals. In particular, the potential of the technique for structure modifications associated with the use of the pulsed electron beam under “heating” and “melting” conditions are highlighted.

Evolution of surface microstructure of Cu-50Cr alloy treated by high current pulsed electron beam

2015 ◽  
Vol 58 (3) ◽  
pp. 462-469 ◽  
Author(s):  
LinJiang Chai ◽  
ZhiMing Zhou ◽  
ZhiPei Xiao ◽  
Jian Tu ◽  
YaPing Wang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Surface Microstructure ◽  
High Current ◽  
Pulsed Electron Beam
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