The formation of low resistance and self-aligned contacts with thermally stable alloyed phases is a prerequisite for realizing reliable functionality in ultrascaled semiconductor transistors. Detailed structural analysis of the phase transformation accompanying contact alloying can facilitate contact engineering as transistor channels approach a few atoms across. Original in situ heating transm...

Noble metals such as Ir, Pt, Au are promising coatings for metal medical implants to improve biocompatibility and corrosion resistance. Moreover, these can be used a basis the further formation of bimetallic hetero-structures with enhanced antibacterial properties. In this work, we develop an approach obtain by metal-organic chemical vapor deposition (MOCVD). We have been focused on Ir coating ...

The use of a single metal for all restorations would be necessary because it protects against metal corrosion caused by the contact of different metals. For this "one-metal rehabilitation" concept, non-alloyed commercially pure (CP) titanium should be used for all restorations. Titanium frameworks have been cast and used for the long term without catastrophic failure, whereas they have been fab...

Introduction: One of the most perplexing phenomenons in orthodontics is the crowding of anterior teeth, which brings the patient to the orthodontist seeking remedy because of its aesthetic and functional consequences. The present study was aimed to clinically evaluate and compare the efficiency of NiTi and multistranded stainless steel wire during initial levelling and aligning of crowded lower...

BACKGROUND Orthodontic wires are the corner stones of the science and art of orthodontics and they remain in the patient's mouth for a prolonged period of 18-24 months. It is but natural to expect that they will undergo some biodegradation when in the oral environment during that period. This study aims to compare the biodegradation characteristics of four different orthodontic wires, stainless...

The purpose of this paper is to utilize the signaling pathway polymerase chain reaction (PCR) arrays to investigate the activation of two important biological signaling pathways in endothelial cell adhesion and growth mediated by adsorbed serum protein on the surface of bare and titanium nitride (TiN)-coated nickel titanium (NiTi) alloys. First, the endothelial cells were cultured on the bare a...

The strain-temperature behavior of Ni-Ti samples upon martensitic phase transformation was investigated as a function of applied uniaxial tensile and compressive stresses. Axial and transverse strains were measured. The samples were fabricated from stock bars of powder metallurgical origin. They were machined into tubes or solid bars with square cross sections. The tubular samples were cycled i...