The Stability of γ" and γ' Phases in Alloy 718 Under Electron Irradiation

2001 ◽  
Author(s):  
M. Sundararaman ◽  
S. Banerjee ◽  
H. Mori
Keyword(s):  
Electron Irradiation ◽  
Alloy 718 ◽  
The Stability

scholarly journals An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Y. Tong ◽  
G. R. Berdiyorov ◽  
A. Sinopoli ◽  
M. E. Madjet ◽  
V. A. Esaulov ◽  
...  
Keyword(s):  
Electron Irradiation ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Crystal Surface ◽  
Depth Profiling ◽  
Low Energy ◽  
Cross Linking ◽  
Xps Spectra ◽  
Self Assembled ◽  
The Stability

AbstractThe stability of the molecular self-assembled monolayers (SAMs) is of vital importance to the performance of the molecular electronics and their integration to the future electronics devices. Here we study the effect of electron irradiation-induced cross-linking on the stability of self-assembled monolayer of aromatic 5,5′-bis(mercaptomethyl)-2,2′-bipyridine [BPD; HS-CH2-(C5H3N)2-CH2-SH] on Au (111) single crystal surface. As a refence, we also study the properties of SAMs of electron saturated 1-dodecanethiol [C12; CH3-(CH2)11-SH] molecules. The stability of the considered SAMs before and after electron-irradiation is studied using low energy Ar+ cluster depth profiling monitored by recording the X-ray photoelectron spectroscopy (XPS) core level spectra and the UV-photoelectron spectroscopy (UPS) in the valance band range. The results indicate a stronger mechanical stability of BPD SAMs than the C12 SAMs. The stability of BPD SAMs enhances further after electron irradiation due to intermolecular cross-linking, whereas the electron irradiation results in deterioration of C12 molecules due to the saturated nature of the molecules. The depth profiling time of the cross-linked BPD SAM is more than 4 and 8 times longer than the profiling time obtained for pristine and BPD and C12 SAMs, respectively. The UPS results are supported by density functional theory calculations, which show qualitative agreement with the experiment and enable us to interpret the features in the XPS spectra during the etching process for structural characterization. The obtained results offer helpful options to estimate the structural stability of SAMs which is a key factor for the fabrication of molecular devices.

scholarly journals The Effect of Thermomechanical History on the Stability of Alloy 718

1968 ◽  
Author(s):  
R.S. Cremisio ◽  
J.F. Radavich ◽  
H.M. Butler
Keyword(s):  
Alloy 718 ◽  
The Stability

Physical Properties of Diamond-Like Nanocomposite Films

1994 ◽  
Vol 351 ◽  
Author(s):  
B. Dorfman ◽  
M. Abraizov ◽  
B. Pypkin ◽  
M. Strongin ◽  
X.-Q. Yangn ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Magnetron Sputtering ◽  
Electron Irradiation ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Nanocomposite Films ◽  
Metal Target ◽  
Combined Process ◽  
The Stability ◽  
Raman And Ir Spectroscopy

ABSTRACTDiamond-like nanocomposite (DLN) and metal containing DLN (Me-DLN) films, synthesized in a combined process of deposition of carbon-silicon precursor and magnetron sputtering of a metal target, have been examined by Auger electron spectroscopy, Raman and IR spectroscopy, nanoindentation and internal stress measurements. The stability of the films under ion and electron irradiation and thermal annealing has been tested.

Small Onions Formation Under Electron Irradiation of Turbostratic Bc2n and Turbostratic Bn

1997 ◽  
Vol 3 (S2) ◽  
pp. 737-738
Author(s):  
O. Stephan ◽  
Y. Bando ◽  
K. Kurashima
Keyword(s):  
High Temperature ◽  
Vapor Phase ◽  
Electron Irradiation ◽  
Phase Reaction ◽  
Polyhedral Particles ◽  
Curved Structures ◽  
Theoretical Predictions ◽  
Vapor Phase Reaction ◽  
The Stability ◽  
Intense Electron

After the discovery of C fullerenes and C nanotubes grown in the vapor phase, the formation of carbon onions [1] in the condensed phase from the irradiation of graphitic polyhedral particles with an intense electron beam gave further evidence that spherical carbon network can be favored under high temperature and strong irradiation regimes. Recently, BN and B-C-N hybrid nanotubes were synthetized. In spite of theoretical predictions, so far there has been no experimental evidence for the stability of B-N and B-C-N analogs of buckminster fullerenes. We exposed turbostratic BC2N and turbostratic BN samples to intense electron irradiation to study the ability of the honey comb network to include non hexagonal member rings and form curved structures.In the experiments described here, the BC2N starting materials were synthesized from vapor phase reaction (CVD) of BC13 and CH3CN. Such samples were then exposed to high temperature-high pressure (HT-HP) conditions at 7.7.

The effect of Thermomechanical History on the Stability of Alloy 718

JOM ◽  
1969 ◽  
Vol 21 (11) ◽  
pp. 55-61 ◽  
Author(s):  
R. S. Cremisio ◽  
H. M. Butler ◽  
J. F. Radavich
Keyword(s):  
Alloy 718 ◽  
The Stability

Stability of Cascades Under ion and Electron Irradiation in Germanium

1994 ◽  
Vol 373 ◽  
Author(s):  
Hiroaki Abe ◽  
Chiken Kinoshita ◽  
Yasutaka Denda
Keyword(s):  
Electron Microscope ◽  
Point Defects ◽  
High Voltage ◽  
Electron Irradiation ◽  
Ion Irradiation ◽  
Elementary Processes ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
Ion Accelerator ◽  
The Stability

AbstractConcurrent irradiation with ions and electrons has been done in a high voltage electron microscope interfaced with an ion accelerator. The objective is to clarify the stability of cascades in Ge in terms of the elementary processes associated with the concurrent irradiation. Amorphous-like cascade contrast is observed under ion irradiation and increases in number eventually leading to saturation. The cascade contrast is produced within cascade regions through sequential overlaps of cascades and heavier ions form more stable cascade regions. The concurrent or subsequent electron irradiation recrystallizes cascade regions through shrinkage of the cascade contrast. Point defects and their diffusion induced by electrons contribute to the recrystallization of cascade regions.

Morphology of Irradiated Adjacent Single-Walled Carbon Nanotubes

2014 ◽  
Vol 553 ◽  
pp. 88-93
Author(s):  
Katherine McDonell ◽  
Gwénaëlle Proust ◽  
Lu Ming Shen
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Electron Irradiation ◽  
Temperature Effects ◽  
Single Walled Carbon Nanotubes ◽  
Cross Linking ◽  
Single Walled Carbon ◽  
Atomic Vacancy ◽  
The Stability ◽  
Walled Carbon Nanotubes

Molecular dynamics was used to simulate the electron irradiation of two adjacent single-walled carbon nanotubes (SWNTs) via the Primary Knock-on Approximation. Temperature effects on the creation and evolution of defects were studied. The most prevalent defect was atomic vacancy which evolved into multi-vacancy over successive irradiation impacts. Cross linking was also observed. As temperature increased, mending of damage was promoted and the stability of bonds decreased. A new morphology of cross linking in the form of interconnecting carbon rings is presented.

Sign in / Sign up

Export Citation Format

Share Document