The effects of surface modification treatments such as shot peening, ion implantation (carbon and nitrogen), surface lubrication (soft coating), laser gas nitriding and various combinations thereof, on the fretting fatigue resistance of Ti-6Al-4V have been investigated. The best of these surface treatments appears to be shot peening. While ion implantation improves the base metal fretting fatig...

Here we present a simple physical method to prepare magnetic nanodiamonds (NDs) using high dose Fe ion-implantation. The Fe atoms are embedded into NDs through Fe ion-implantation and the crystal structure of NDs are recovered by thermal annealing. The results of TEM and Raman examinations indicated the crystal structure of the Fe implanted NDs is recovered completely. The SQUID-VSM measurement...

Using the methods of Auger electron and photoelectron spectroscopy light absorption spectroscopy, composition, densities state electrons in valence band, parameters energy bands Ge (111) implanted with Na + ions an E 0 =0.5 keV at a dose D sat =6· 10 16 cm -2 thin layer NaGe 2 obtained by annealing ion-implanted Ge. It is shown that narrow n-type band (~ 0.2 eV) appears spectrum after ion impla...

Single and double planar waveguides were fabricated by 2 MeV and 4 MeV He implantation in ZBLAN. Calculation of ion implantation parameters, cut-off wavelength measurement and near-field detection indicate that ∆n is negative, typically -1x10.  1999 Optical Society of America OCIS codes: (130.3130) Integrated optics materials; (230.7390) Waveguides, planar.

a r t i c l e i n f o The amorphization and graphitization of single-crystal diamond by ion implantation were explored using transmission electron microscopy (TEM). The effect of ion implantation and annealing on the microstructure was studied in (100) diamond substrates Si + implanted at 1 MeV. At a dose of 1 × 10 15 cm − 2, implants done at 77 K showed a damage layer that evolves into amorpho...

From Plasma Immersion Ion Implantation to Deposition: A Historical Perspective on Principles and Trends André Anders Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA Abstract Plasma immersion techniques of surface modification are known under a myriad of names. The family of techniques reaches from pure plasma ion implantation, to ion implantation...

Germanium and carbon ions represent a significant portion of total ion implantation steps in the process flow. Very often ion source materials that used to produce ions are chemically aggressive, especially at higher temperatures, and result in fast ion source performance degradation and a very limited lifetime. GeF4 and CO2 are commonly used to generate germanium and carbon beams. In the case ...

This clinical study evaluated a new surface treatment of ion implantation with CO ions which has previously been subjected to extensive study in animal models. The aim of this work was to assess its effect in humans. Experimental mini-implants were used; half of their longitudinal surface was machined and the other half was treated with CO ion implantation. The study was conducted in healthy vo...