In the present stady, thermochemical treatment in H2/NH3 atmosphere was used as a post-treatment for electroless Ni-P coatings on the AISI 4140 steel substrates. High phosphorus (9%) coatings with thicknesses of 2, 24 and 48 m were applied and the effects of the thermochemical treatment on the morphology, structural changes, roughness, hardness &#10&#10and wear resistance of coatings were studi...

Protective coatings that resist oxide scale growth and decrease chromium evaporation are necessary to makestainless steel interconnect materials for long-term durable operation of solid oxide fuel cells (SOFCs). Inthis study a layer of manganese was coated on the surface of AISI 441 ferritic stainless steel which is used insolid oxide fuel cells for interconnect applications. The oxidation beha...

Diffusion technique of metallization is applied for receiving zinc coatings on low-carbon steel with transitional zone. Structure diffusion layers after saturation 09Mn2Si in ammonia at different temperatures examined. Effects temperature thickness are discovered. Process 600⁰C forms high strengthening level and smooth microhardness profiles. Elements (Fe, Zn, N) spectrums analyzed, phase compo...

1 ABSTRACT A Monte-Carlo programme has been developed to simulate thin film deposition in a square groove. It demonstrates that conformal coating requires (1) the mean free part to be greater than the feature size; (2) a low sticking coefficient for incoming reactant molecules. 2 INTRODUCTION The increasing use of anisotropic etching in the manufacture of integrated circuits is stimulating rese...

Atomic layer deposition (ALD) is a technique of choice for uniform, conformal coating substrates complex geometries, owing to its characteristic self-limiting surface reactions upon sequential exposure precursor vapors. In order achieve uniform coating, sufficient gas needs be provided. This requirement becomes particularly relevant highly porous and high aspect-ratio substrates, where the tran...

Recently, wear resistant properties of metallic glasses has attracted a lot of interest. Because the surface of metallic glasses are prone to phase transformation, finding the effects of test condition on structure and wear behavior of metallic glasses is important. In this research, by using an automated electrospark deposition (ESD), a layer of Fe51Cr18Mo7B16C4Nb4 was deposited on AISI 316l s...

Introduction At present medical activated carbons (AC) are used as oral adsorbents and for haemoperfusion mostly in acute poisoning with small molecular weight toxins. Respectively, the efforts to make an efficient medical activated carbon are aimed at developing its microporous structure. Potential for therapeutic use of activated carbon with larger pores – mesopores is almost completely overl...

In an alloy subject to vacancy-mediated diffusion, differences in intrinsic diffusivities tend produce vacancy excess and deficit. These are accommodated by mechanisms such as dislocation climb pore formation. This is of concern high temperature alloy-coating systems used industrial applications, pores may develop at the interface between coating, which undesired. paper presents a multicomponen...