The aim of this study was to determine the effect of the oral environment on the corrosion of dental alloys with different compositions, using electrochemical methods. The corrosion rates were obtained from the current-potential curves and electrochemical impedance spectroscopy (EIS). The effect of artificial saliva on the corrosion of dental alloys was dependent on alloy composition. Dissoluti...

This study compared the microstructures and mechanical properties of nickel–chromium–molybdenum (Ni–Cr–Mo) alloys prepared from a single alloy with an identical composition using two new digital processes (selective laser melting (SLM) soft metal milling (SMM)) conventional lost-wax casting (LWC). Disc specimens were used to via various analytical methods, while dumbbell-shaped subjected tensio...

Advanced high-temperature cooling applications such as heat-pipe-cooled leading edges may often require the elevated-temperature capability of carbon/silicon carbide (C/SiC) or carbon/carbon (C/C) composites in combination with the hermetic capability of metallic tubes. In some applications, it may be advantageous to co-process metallic tubes with the composite. Under those conditions, it is im...

Ti–27.5Al–13Nb is an intermetallic alloy that incorporates the orthorhombic Ti2AlNb phase (O phase) and ?2 phase, was previously developed by authors for high-temperature applications. The aim of present study to develop less expensive alloys. For this purpose, a portion cost-prohibitive Nb in baseline replaced with equivalent amount Fe and/or Mo, yielding three new derivative alloys: Mo-replac...

With the growth of automobile, machinery, and aerospace industries, demand for high-performance surface coatings having multifunctional characteristics use in mechanical parts is increasing. In this study, ternary/quaternary Mo–Cu–Cr–(N) nanocomposite were deposited at different N2 gas flow rates using direct current magnetron sputtering from a multicomponent single-alloy target. The target sim...

Five non-precious Ni-Co based alloys were analyzed with respect to their corrosion behaviour. The correlation between the amount of the elements Cr, Mo, V and the corrosion behaviour, expressed by the PREN (pitting resistance equivalent number) index in the case of the allied steels, was extended for Ni-Cr and Co-Cr dental alloys characterization. Open circuit potential, corrosion current densi...

The ASTM F-75 (Co-28%Cr-6%Mo) is widely used as a biocompatible alloy in medicine for manufacturing implants. In this study, effect of mold preheating on the as-cast microstructure of the alloy was investigated using the solid investment casting process. Several mold preheating temperatures of 550, 700, 850 and 1000 °C were selected at the same melt superheat. The samples were characterized by ...

The Cr-Ta alloy with an eutectic structure has a good combination of high strength and oxidation resistance at elevated temperatures up to 1,200°C. It is an ideal candidate for ultrahigh-temperature applications. However, the material shows low ductility and fracture toughness at room temperature. An effective way to improve the ductility and fracture toughness is to obtain an aligned microstru...

Several investigators have pointed out that electron and neutron contamination from high-energy photon beams are clinically important. The aim of this study is to assess electron and neutron contamination production by various prostheses in a high-energy photon beam of a medical linac. A 15 MV Siemens PRIMUS linac was simulated by MCNPX Monte Carlo (MC) code and the results of percentage depth ...