Article

Refining of Magnesium Melts with Special Additives.

January 1976
Izvestiya Non-Ferrous Metallurgy

Authors:

A comparative study is made of the effectiveness of manganese, zirconium, and titanium additives in removing impurities present in a magnesium melt. In analysis of the experimental data attests to the possibility of removing iron, silicon, and aluminum from a magnesium melt by introducing no more than 0. 1% zirconium or 0. 37% titanium into the melt. The results on the removal of impurities from magnesium with the aid of manganese indicate the possibility of removing iron, silicon, nickel, and aluminum from the melt by introducing a large quantity of manganese (no less than 0. 9%) into the melt.

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Article

Zr6Ni6TiSiOx: A new structure type with a mixed early-late transition-metal framework

June 1993 · Chemistry of Materials

An interstitially stabilized intermetallic in a mixed early-late transition-metal system has been found to crystallize in a new structure type. The new compound Zr6Ni6TiSiOx (x = 1.8) was synthesized by melting Zr, Ni, Si, and Ti2O3 in an arc furnace, followed by annealing in vacuum at 900-1150-degrees-C. The crystal structure was determined by refinement of single-crystal X-ray diffraction data. ... [Show full abstract] The structure was refined in the centrosymmetric space group P3m1BAR, Z = 2, with lattice parameters a = b = 8.2778(9) angstrom, and c = 7.444(1) angstrom (R = 0.030, R(w) = 0.033). Oxygen atoms center zirconium trigonal antiprisms, which share faces to form a three-dimensional network. The titanium and silicon atoms are coordinated by icosahedra of nickel or of zirconium and nickel atoms. A structural comparison with the kappa-phase will be discussed.

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Producing and studying oxide coatings containing manganese and nickel compounds on titanium from ele...

January 2012 · Protection of Metals and Physical Chemistry of Surfaces

Regular effects of anion-active surfactants added to silicate electrolyte suspensions containing dispersed MnO2 and NiO particles on the composition, properties, and catalytic activity of the oxide compositions produced on titanium by plasma-electrolytic oxidation are studied. In both cases, introducing surfactants is shown to result in similar changes in the surface relief, namely, an increase ... [Show full abstract] in the surface domains and height drops between crests and hollows, as well as a simultaneous decrease in the size and concentration of pores. At the same time, the elemental and phase compositions of the coatings, as well as their catalytic activity with respect to the CO oxidation, are determined by the nature of both the solid particles and surfactant used.

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Pyrometallurgical Magnesium Recycling by Precipitation of Intermetallic Phases

September 2015 · Chemie Ingenieur Technik

Stephanie Duwe

Due to its high affinity to noble metals the recycling of magnesium is not trivial and the removal of corrosion promoting elements a challenge. Especially for the separation of nickel no industrially efficient method exists. In this work a reduction of the nickel content in contaminated magnesium-aluminum alloys down to 100 ppmw could be achieved by the combined use of aluminum and zirconium. ... [Show full abstract] Although this residual content does not satisfy the highest purity grade of standard magnesium-aluminum alloys (10 – 50 ppm) this still remains a great step towards an efficient magnesium recycling process.

Article

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March 1968 · Metal Science and Heat Treatment

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Duct and cladding alloy

January 1970

An austenitic alloy having good thermal stability and resistance to sodium corrosion at 700.degree. C. consists essentially of 35-45% nickel 7.5-14% chromium 0.8-3.2% molybdenum 0.3-1.0% silicon 0.2-1.0% manganese 0-0.1% zirconium 2.0-3.5% titanium 1.0-2.0% aluminum 0.02-0.1% carbon 0-0.01% boron and the balance iron.

Article

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January 1970

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Full-text available

Deoxidation Equilibrium of Zirconium in the Iron-Nickel Melts

July 2013 · ISIJ International

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Article

Study on the Deoxidation of Stainless Steel with Aluminium

August 1970 · Tetsu-to-Hagane

A study was carried out on the deoxidation with aluminum instead of with silicon and manganese, aiming to improve the quality of 18-8 stainless steel, and its practical utilization was discussed. Experimental results are as follows: (1) 18-8 stainless steel deoxidized with Si and with Mn in a 10-kg induction furnace was thentreated with Al (0.5 to 1.0kg/t), resulting in a fairly well reduction of ... [Show full abstract] oxygen content. By holdingthe melt decrease of Al and increase of oxygen are recognized (2) Experiments in an 8-t Heroult furnace have shown that, even when aluminum is added at anearly finishing stage, the recovery of oxygen before tapping takes place remarkably. Aluminum additionin ladle should also be avoided because residual alumina might give rise to surface seams. Accordingly it is most suitable, to add aluminum at an intermediate stage. (3) By the well-timed aluminum addition the surface defects of cold rolled sheet are far less thanthose by conventional deoxidation. A little addition of titanium along with aluminum further diminishesthe surface defects. (4) For fine grain austenitic steel treated with titanium the pre-oxidation with Al is more effective, since the reduced oxygen content leads to a high yield of titanium available for the grain refinement.