Nitriding of p-type Si samples by pulsed DC glow discharge is carried out for different Ar concentrations (30% to 90%) in nitrogen-argon plasma whereas the other parameters like pressure (2 mbar), treatment time (4 hr) and power (175 W) are kept constant. The phase identification, crystal structure, crystallinity, chemical composition, surface morphology and topography of the nitrided layer are...

in this study, the effect of grain size on nitrogen diffusion into ck45 has been investigated. in order to obtain different grain sizes, samples were annealed and normalized at various temperatures and durations.the grain size was determined with clemex vision software. then, the specimens were exposed to dc plasma nitriding treatment and again analyzed by optical microscope ,scanning electron ...

The residual stress and hardness generated by the nitriding process are important parameters for increasing bending fatigue strength to Ti-6Al-4V. Therefore, this research is focused on analysis of hardness, including surface morphology microstructure at different times temperatures. plasma temperatures 750 °C 800 with 5 h 10 were selected in research. After nitriding, material would have compr...

Nitriding treatments of low alloyed steels can be performed only at relatively low temperatures in order to avoid a decrease of corrosion resistance due to nitride layers formation. These conditions promote the formation of the compound layer and diffusion zone, which shows high hardness and good corrosion resistance. In the present paper, the influence of the gas mixture N2-H2 in plasma nitrid...

This paper presents the results of research on influence plasma nitriding technology parameters working surface deformation hypoid gears. Blue light with non-contact measuring devices is used to determine gears after nitriding. The study has determined a regression equation showing gear. minimum optimization value at planning area 0.0071746 permeation temperature TL=4.89oC, time h=510h, and gas...

In this work, plasma nitriding treatments were performed on ferritic/martensitic stainless steel type 410S at 400 ºC (Low-temperature Plasma Nitriding - LTPN) and 530 (Conventional CPN). The carried out under a 75% N2 -25% H2 gas mixture for 20 hours. After LTPN, layer composed of expanded ferrite/martensite with minor fraction iron nitrides was obtained. CPN, the nitrided surface consists an ...

Manganese and its nitrides have recently been shown to co-catalyse the ammonia decomposition reaction. The nitriding reaction of manganese under ammonia decomposition conditions is studied in situ simultaneously by thermogravimetric analysis and neutron diffraction. Combining these complementary measurements has yielded information on the rate of manganese nitriding as well as the elucidation o...