Kratkotrajno niskotemperaturno nitriranje austenitnog čelika 316L

The AISI 316L austenitic steel after glow discharge nitriding at temperature of T = 673 K and duration of τ=14,4 ks, for two different variants of specimen arrangement in the glow-discharge chamber was investigated. In order to assess the effectiveness of nitriding process, the surface layers profile analysis examination, surface hardness and hardness profile examination, the analysis of surface layer structures and corrosion resistance tests were performed. It has been found that application of a booster screen effects in a nitrogen diffusion depth increment into the 316L austenitic steel surface, what results in the surface layer thickness escalation.Ispitani su uzorci od AISI 316L austenitni čelik tretirani na dva raziličita načina u komori za nitriranje nakon nitriranja na temperaturi T=673 K u trajanju τ=14,4 s. Kako bi procijenili efikasnost procesa nitriranja provedena je analiza profila površinskog sloja, ispitana je površinska tvrdoća kao i tvrdoća profila, te analiza strukture površinskog sloja i ispitivanje korozijske otpornosti. Pronađena je primjena efekta pojačane podrške u povećanju dubine difuzije kod nitriranja u površinu austenitnog čelika 316L, što rezultira povećanje debljine površinskog sloja

MICROSTRUCTURE AND THERMAL STABILITY OF TRANSITION METAL NITRIDES AND BORIDES ON GaN

ABSTRACT Microstructure and thermal stability of ZrN/ZrB 2 bilayer deposited on GaN have been studied using transmission electron microscopy methods (TEM) and secondary ion mass spectrometry (SIMS). It has been demonstrated that annealing of the contact structure at 1100 0 C in N 2 atmosphere does not lead to any observable metal/ semiconductor interaction. In contrast, a failure of the integrity of ZrN/ZrB 2 metallization at 800 0 C, when the heat treatment is performed in O 2 ambient has been observed

Short-term low-temperature glow discharge nitriding of 316L austenitic steel

The AISI 316L austenitic steel after glow discharge nitriding at temperature of T = 673 K and duration of τ=14,4 ks, for two different variants of specimen arrangement in the glow-discharge chamber was investigated. In order to assess the effectiveness of nitriding process, the surface layers profile analysis examination, surface hardness and hardness profile examination, the analysis of surface layer structures and corrosion resistance tests were performed. It has been found that application of a booster screen effects in a nitrogen diffusion depth increment into the 316L austenitic steel surface, what results in the surface layer thickness escalation