Buscar
Mostrando ítems 11-17 de 17
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Stress reduction in a-C:H coatings through the addition of nitrogen to the feed gas
(ScienceDirect, 2004-09)
Intrinsic stress in amorphous hydrogenated carbon (a-C:H) coatings was reduced through addition of 10–20 sccm N2 to the feed gas. The compressive stresses observed in this study were in the range −0.91 to −1.6 GPa. ...
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
The design of an electrostatic variable energy positron beam for studies of defects in ceramic coatings and polymer films
(ScienceDirect, 2002-06-22)
An electrostatic variable energy positron beam for studying defects in ceramic coatings, polymer films and MOS-devices is developed for operation in Doppler-broadening (DB) and positron annihilation lifetime (PAL) modes. ...
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
A modified blister test to study the adhesion of thin coatings based on local helium ion implantation
(ScienceDirect, 2005-01)
A modified blister test has been developed based on helium ion implantation into selected areas of the metal substrate prior to the coating deposition. After a post-deposition thermal annealing, blisters are formed by ...
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Study of polymer/metal coating under stress using positron annihilation spectroscopy
(ScienceDirect, 2000-12-01)
Positron annihilation spectroscopy (PAS) has proven to be a very useful technique for, e.g., the study of defects in materials and the characterization of polymer free-volume. Positron lifetime, Doppler broadening of the ...
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Positron annihilation and transmission electron microscopy study of the evolution of microstructure in cold-rolled and nitrided FeNiTi foils
(IOPScience, 2001)
Positron beam analysis (PBA) and transmission electron microscopy (TEM) were applied to study structural transformations in cold-rolled Fe0.94Ni0.04Ti0.02 foils, which were subjected to different thermal treatments in an ...
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Protrusion formation and surface porosity development on thermally annealed helium implanted copper
(ScienceDirect, 2004-04)
Surface effects on (1 1 1) copper single crystal surfaces after 30 keV helium implantation up to 2.4 × 1016 ions cm−2 and subsequent annealing at 973 K have been studied using scanning electron and confocal microscopy. ...
Artículo
![Con acceso al texto completo Icon](/themes/idUS//images/acceso/opened_access.png)
Thermally induced delamination of amorphous hydrogenated carbon coatings monitored by positron beam analysis
(ScienceDirect, 2004-03)
In this work we have studied the adhesion of PVD amorphous hydrogenated carbon (a-C:H) thin coatings (<200 nm) on crystalline silicon by means of positron beam analysis (PBA). PBA allows the study of the a-C:H layer and ...