Topic
Tungsten
About: Tungsten is a research topic. Over the lifetime, 35225 publications have been published within this topic receiving 456213 citations. The topic is also known as: W & element 74.
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TL;DR: In this paper, diamond-like carbon (Me-DLC) coatings were prepared by magnetron sputter deposition using tungsten, Tungsten carbide, niobium and titanium as target materials.
Abstract: Metal containing diamond-like carbon (Me-DLC) coatings were prepared by magnetron sputter deposition using tungsten, tungsten carbide, niobium and titanium as target materials. An essential parameter for the process characterization is the target voltage. The substrate heating during the film growth depends on the target material. For the tungsten target, the contribution of energetic neutrals to the heat flux is quite high. From the viewpoint of resistance to abrasive wear, the best properties were found for W-DLC. The Nb-DLC coatings have an intermediate wear rate but offer the lowest friction coefficients and a high performance under adhesive wear loading. All Me-DLC coatings investigated in this study exhibit clearly higher wear rates than metal-free DLC films prepared by a radio frequency glow discharge technique. Metallic intermediate layers allow the preparation of coatings with a very good adhesion.
130 citations
130 citations
TL;DR: In this article, the results of experimental and theoretical investigations of phase equilibria in the W-C system and of the crystal and electronic structures of tungsten carbides are generalised.
Abstract: The results of experimental and theoretical investigations of phase equilibria in the W–C system and of the crystal and electronic structures of tungsten carbides are generalised. The phase diagram of the W–C system supplemented by new compounds is considered. The sequence of phase transformations associated with ordering of lower hexagonal carbide β-W2C is analysed. The region of existence of cubic carbide γ-WC1–x is discussed in detail. The generalised information on the phase equilibria in the ternary system W–Co–C, which forms the basis for the synthesis of hard alloys WC–Co, is given. Methods of synthesis of tungsten carbides and hard alloys based on them are considered. Modern methods for the synthesis of nanostructured hard alloys are discussed in detail as well as their structures and properties.
130 citations
TL;DR: In this paper, the effects of specific fluxes used in the tungsten inert gas (TIG) process on surface appearance, weld morphology, angular distortion, mechanical properties, and microstructures when welding 6mm thick duplex stainless steel were investigated.
129 citations
TL;DR: In this paper, a wide range of morphologies extending from compact and smooth, up to extremely porous and spongy-like structures have been obtained by Raman spectroscopy.
129 citations