Reversibility of defect formation during oxygen-assisted electron-beam-induced etching of graphene

2017 ◽  
Vol 49 (2) ◽  
pp. 317-323 ◽  
Author(s):  
Guillaume Pillet ◽  
Victor Freire-Soler ◽  
Marc Nuñez Eroles ◽  
Wolfgang Bacsa ◽  
Erik Dujardin ◽  
...  
Keyword(s):  
Electron Beam ◽  
Defect Formation

scholarly journals Создание локализованных ансамблей NV-центров в CVD-алмазе с помощью облучения электронным пучком

2019 ◽  
Vol 45 (6) ◽  
pp. 36
Author(s):  
С.А. Богданов ◽  
А.М. Горбачев ◽  
Д.Б. Радищев ◽  
А.Л. Вихарев ◽  
М.А. Лобаев ◽  
...  
Keyword(s):  
Electron Beam ◽  
Defect Formation ◽  
Cvd Diamond ◽  
Diamond Lattice ◽  
Subsequent Annealing ◽  
Optical Measurements ◽  
Nitrogen Doped ◽  
Nv Center ◽  
Delta Layer

AbstractCreation of localized NV center ensembles, produced by irradiation of CVD diamond with nitrogen doped delta-layer with 200 keV electron beam and the subsequent annealing is demonstrated. Results of optical measurements of activated areas at different irradiation doses are presented. Issues concerning defect formation in diamond lattice during the electron beam impact are discussed.

Beic Investigation of Defects Induced in Cw Beam-Annealed Si

1980 ◽  
Vol 1 ◽  
Author(s):  
N.H. Sheng ◽  
M. Mizuta ◽  
J.L. Merz
Keyword(s):  
Electron Beam ◽  
Laser Annealing ◽  
Defect Formation

ABSTRACTEBIC has been used to investigate the beam-induced damage in As+ -implanted Si subjected to scanned laser or electronbeam annealing. Comparison is made between these annealing techniques; in general, electron-beam annealing is found to give superior results. In addition, several different experiments combining these techniques are described. Samples were pre-annealed prior to laser annealing, using either thermal or electron-beam annealing. Other samples were given a thermal post-anneal after laser-annealing. The effect of these treatments on defect formation is discussed.

scholarly journals Defects in Electron Beam Melted Ti-6Al-4V: Fatigue Life Prediction Using Experimental Data and Extreme Value Statistics

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 640
Author(s):  
Viktor Sandell ◽  
Thomas Hansson ◽  
Sushovan Roychowdhury ◽  
Tomas Månsson ◽  
Mats Delin ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fatigue Life ◽  
Defect Formation ◽  
Production Method ◽  
Extreme Value ◽  
Extreme Value Statistics ◽  
Material Defects ◽  
Model Input ◽  
X Ray Computed ◽  
Critical Components

Electron beam melting is a powder bed fusion (PBF) additive manufacturing (AM) method for metals offering opportunities for the reduction of material waste and freedom of design, but unfortunately also suffering from material defects from production. The stochastic nature of defect formation leads to a scatter in the fatigue performance of the material, preventing wider use of this production method for fatigue critical components. In this work, fatigue test data from electron beam melted Ti-6Al-4V specimens machined from as-built material are compared to deterministic fatigue crack growth calculations and probabilistically modeled fatigue life. X-ray computed tomography (XCT) data evaluated using extreme value statistics are used as the model input. Results show that the probabilistic model is able to provide a good conservative life estimate, as well as accurate predictive scatter bands. It is also shown that the use of XCT-data as the model input is feasible, requiring little investigated material volume for model calibration.

scholarly journals Effect of Powder Recycling on Defect Formation in Electron Beam Melted Alloy 718

2020 ◽  
Vol 51 (5) ◽  
pp. 2430-2443 ◽  
Author(s):  
Hans Gruber ◽  
Cosmina Luchian ◽  
Eduard Hryha ◽  
Lars Nyborg
Keyword(s):  
Electron Beam ◽  
Defect Formation ◽  
Alloy 718 ◽  
Powder Recycling

The Regularities of Copper-Aluminum System Polymetallic Samples Manufacturing by the Additive Electron-Beam Technology

2020 ◽  
Vol 992 ◽  
pp. 517-522
Author(s):  
K.N. Kalashnikov ◽  
Kseniya S. Osipovich ◽  
T.A. Kalashnikova
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aluminum Alloy ◽  
Electron Beam ◽  
Defect Formation ◽  
Boundary Zone ◽  
Copper Aluminum ◽  
Printing Parameters ◽  
Amg5 Aluminum Alloy ◽  
Scanning Electron

The structure and composition of polymetallic materials samples obtained by electron-beam manufacturing from AMg5 aluminum alloy and M1 grade copper were investigated by optical and scanning electron microscopy. Mechanisms of defect formation in the structure of samples at different 3D printing parameters are determined. The features of gradient structures formation in the boundary zone at successive deposition of aluminum alloy and copper layers are investigated.

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