Size effect in nonstoichiometric titanium monoxide and vanadium carbide nanocrystals measured by positron lifetime spectroscopy

2019 ◽  
Vol 29 (5) ◽  
pp. 486-488 ◽  
Author(s):  
Andrey A. Rempel ◽  
Albina A. Valeeva ◽  
Alexey S. Kurlov ◽  
Gregor Klinser ◽  
Wolfgang Sprengel
Keyword(s):  
Size Effect ◽  
Vanadium Carbide ◽  
Positron Lifetime ◽  
Titanium Monoxide ◽  
Positron Lifetime Spectroscopy ◽  
Nonstoichiometric Titanium

Nanometer size pores in ionic liquid loaded silica gel characterized by positron lifetime spectroscopy

2015 ◽  
Vol 213 (1) ◽  
pp. 165-169 ◽  
Author(s):  
Christian Herold ◽  
Hubert Ceeh ◽  
Thomas Gigl ◽  
Markus Reiner ◽  
Marco Haumann ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Silica Gel ◽  
Positron Lifetime ◽  
Nanometer Size ◽  
Positron Lifetime Spectroscopy

Defects in electron irradiated GaP studied by positron lifetime spectroscopy

1995 ◽  
Vol 60 (6) ◽  
pp. 541-544 ◽  
Author(s):  
A. Polity ◽  
Th. Abgarjan ◽  
R. Krause-Rehberg
Keyword(s):  
Positron Lifetime ◽  
Positron Lifetime Spectroscopy

Study of Compensation Defects and Electron Irradiation-Induced Defects in Undoped SI-InP by Positron Lifetime Spectroscopy

2008 ◽  
Vol 607 ◽  
pp. 134-136
Author(s):  
Y.J. Zhang ◽  
Ai Hong Deng ◽  
You Wen Zhao ◽  
J. Yu ◽  
X.X. Yu ◽  
...  
Keyword(s):  
Electron Irradiation ◽  
Positron Lifetime ◽  
Deep Level ◽  
High Concentration ◽  
Positron Annihilation Lifetime ◽  
Donor Type ◽  
Positron Lifetime Spectroscopy ◽  
Transient Spectroscopy ◽  
Induced Defects ◽  
Irradiation Induced Defects

Positron annihilation lifetime (PAL) spectroscopy，photo-induced current transient spectroscopy (PICTS) and thermally stimulated current (TSC) have been employed to study the formation of compensation defects and their evolvement under iron phosphide (IP) ambience or pure phosphide (PP) ambience. In the formation of IP SI-InP, the diffusion of Fe atoms suppresses the formation of some open-volume defects. As to PP SI-InP, VInH4 complexes dissociate into acceptor vacancies VInHn(n-3)(n=0,1,2,3), which compensate residual donor type defects and make the sample semi-insulating. Electron irradiation-induced deep level defects have been studied by TSC in PP and IP SI-InP, respectively. In contrast to a high concentration of irradiation-induced defects in as-grown and PP annealed InP, IP SI-InP has a very low concentration of defects.

Structure of nanometer-sized polycrystalline iron investigated by positron lifetime spectroscopy

1988 ◽  
Vol 38 (14) ◽  
pp. 9545-9554 ◽  
Author(s):  
H.-E. Schaefer ◽  
R. Würschum ◽  
R. Birringer ◽  
H. Gleiter
Keyword(s):  
Positron Lifetime ◽  
Polycrystalline Iron ◽  
Positron Lifetime Spectroscopy

Positron lifetime spectroscopy in ordered nanoporous polymers

2013 ◽  
Vol 51 (15) ◽  
pp. 1157-1161 ◽  
Author(s):  
Jason Engbrecht ◽  
David Green ◽  
Marc A. Hillmyer ◽  
David Olson ◽  
Eric M. Todd
Keyword(s):  
Positron Lifetime ◽  
Nanoporous Polymers ◽  
Positron Lifetime Spectroscopy

Strain-Rate Dependence of Vacancy Cluster Size in Hydrogen-Charged Martensitic Steel AISI410 under Tensile Deformation

2017 ◽  
Vol 373 ◽  
pp. 171-175 ◽  
Author(s):  
Kazuki Sugita ◽  
Yasumasa Mutou ◽  
Yasuharu Shirai
Keyword(s):  
Strain Rate ◽  
Positron Lifetime ◽  
Tensile Deformation ◽  
Martensitic Steel ◽  
Vacancy Cluster ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Strain Rates ◽  
Vacancy Clusters ◽  
Positron Lifetime Spectroscopy

The strain-rate dependence of vacancy cluster sizes in hydrogen-charged martensitic steel AISI410 under tensile deformation was investigated using positron lifetime spectroscopy. The vacancy-cluster sizes in hydrogen-charged samples tended to increase with decreasing strain rates during the tensile deformations. The vacancy-cluster sizes significantly correlated to the tensile elongations to fracture. It was revealed that the presence of large-sized vacancy-clusters can cause the degradation of mechanical properties and followed by brittle fracture.

Sign in / Sign up

Export Citation Format

Share Document