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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, an investigation of an erosion of the ITER-like divertor castellated targets of pure tungsten, lanthanum tengsten and CFC under plasma heat loads expected during the Type I ELMs and disruptions in ITER was carried out on a plasma gun QSPA-T at the SRC RF TRINITI under EU/RF collaboration.
118 citations
TL;DR: The mechanical properties of the SLM-produced tungsten are comparable to that produced by the conventional fabrication methods, with hardness values exceeding 460 HV0.05 and an ultimate compressive strength of about 1 GPa, which offers new potential applications of refractory metals in additive manufacturing.
117 citations
TL;DR: In this paper, the authors describe the synthesis of 2D WO3 crystals with the {002} facet primarily exposed, octahedral wO3 or WO 3·nH2O with exposed {111} facets, and WO-3 films with dominant orientations, such as orientation along the ''002'' facet.
Abstract: The photocatalysis, chromism, and sensing capabilities of nanostructured tungsten oxides, such as tungsten trioxide (WO3), its suboxides (WOx, 0 < x < 3) and hydrates (WO3·nH2O, n = 1/3 (0.33), 0.5, 0.75, 1, 2, etc.), tungsten bronzes MxWO3 (M = Li, Na, K, Rb, Cs and NH4), and metal tungstates (such as Bi2WO6 and CuWO4) have attracted much attention. To improve these properties, many strategies have been pursued, such as morphology control, doping, and heterostructuring. Crystal facet engineering has recently become a very important method of fine-tuning the physicochemical properties of semiconductors. The photocatalytic reactivity of a photocatalyst is significantly affected by its surface environment, including its surface electronic and atomic structures, which strongly depend on the crystal facets. It is believed that crystals with different exposed facets will have different properties, with the exposure of highly activated facets enhancing the photocatalytic and sensing properties. This article describes the syntheses of 2D WO3 crystals with the {002} facet primarily exposed, octahedral WO3 or WO3·nH2O with exposed {111} facets, and WO3 films with dominant orientations, such as orientation along the {002} facet. WO3 doping, WO3-based heterostructuring and their applications are also presented in this paper.
117 citations
117 citations
TL;DR: In this paper, the anodic behavior of tungsten (W) in a broad pH range (0.5-13.5) in H 3 PO 4 /KOH buffered solution was studied.
Abstract: Potentiodynamic and potentiostatic polarization, and the rotating disk electrode technique, were used to study the anodic behavior of tungsten (W) in a broad pH range (0.5-13.5) in H 3 PO 4 /KOH buffered solution. Surface oxides were found to play a prominent role in the anodic oxidation and dissolution of tungsten. Five distinct pH regimes and the corresponding reaction mechanisms were identified. Below pH I (region A) H + -assisted dissolution was the main dissolution pathway. As the pH increased, the role of H diminished and at pH 2.6 (region B), which was identified as the point of zero charge (pzc) of the surface tungsten oxide, dissolution was mainly H 2 O-assisted. The dissolution was observed to be OH -assisted above the pzc. The reaction order for OH was one between pH 4.5 and 6.5 (region C). The reaction order became zero at pH 8 (region D). This observation was attributed to the pH-independent dissolution of the hydrated oxide phase. Above pH 10, OH dependence of the anodic current commenced and at around pH 12.5 (region E) the reaction order for OH - became one.
117 citations