A5043705864- Magnesium Alloys: Properties and Applications
- Aluminum Alloys Composites Properties
- Extraction and Separation Processes
- Aluminum Alloy Microstructure Properties
- Bauxite Residue and Utilization
- Advanced ceramic materials synthesis
- Radioactive element chemistry and processing
- Minerals Flotation and Separation Techniques
- Metallurgy and Material Science
- Materials Engineering and Processing
- Corrosion Behavior and Inhibition
- Metal Extraction and Bioleaching
- Geochemistry and Elemental Analysis
- Additive Manufacturing and 3D Printing Technologies
- Fiber-reinforced polymer composites
- Lanthanide and Transition Metal Complexes
- Recycling and utilization of industrial and municipal waste in materials production
- Analytical chemistry methods development
- Forest Biomass Utilization and Management
- Clay minerals and soil interactions
- Heat Transfer and Optimization
- nanoparticles nucleation surface interactions
- Hydrogen Storage and Materials
- Icing and De-icing Technologies
- Polymer Nanocomposites and Properties
TU Bergakademie Freiberg
2018-2024
Helmholtz Institute Freiberg for Resource Technology
2016-2020
Helmholtz-Zentrum Dresden-Rossendorf
2015-2020
Clausthal University of Technology
2000-2015
Institute of Metallurgy
2006
Recycling of magnesium alloys produces scrap metal with high contents copper, nickel and silicon. These impurities are not to be removed by remelting. The products thus have corrosion rates which lie well above those purity alloys. aim is improving the properties contaminated alloys, so that they can used as secondary in structural parts spite their concentration impurities.
Investigations of AS31 magnesium alloy melts on a laboratory scale result in mutual solubility iron and manganese at different temperatures using steel crucibles. However, the solid equilibrium phase is not from crucible but an intermetallic layer, situated between melt. The buildup this layer was investigated by immersing rods, made HII, AZ91 industrial furnaces. composition significantly for melts. Based these results, calculations wear sludge amount possible.
Eudialyte, a sodium rich zirconosilicate, is one of the promising sources for REEs (rare earth elements), particularly HREEs + Y (heavy rare elements and yttrium). The key challenge in hydrometallurgical processing prevention silica gel formation REE separation from resulting multi-element leach solutions. This study deals with selective extraction eudialyte concentrate by roasting. In this method, metal ions are converted into sulfates, followed decomposition non-REE sulfates roasting step...
The aim of this study is the investigation a technological synthesis MgAlON, which prospective coating material on ceramic foam filters for filtration magnesium, aluminum, and other metal melts. Thermodynamic calculations are performed, carried out at 1500 °C in nitrogen atmosphere using samples consisting different fractions Al2O3, MgO, AlN as starting materials. effect quantity these components conversion degree educts evaluated. Furthermore, holding time temperature, well composition...
Herein, the aim is to investigate applicability of various ceramic foam filter materials in filtration magnesium alloy melts. The durability filters studied throughout their immersion an AZ91 melt for up 60 min at 680 °C. four selected types samples consist ZrO 2 , uncoated Al O 3 ‐C and coated MgAlON or . Immersion tests are conducted 5–60 a vertical tube furnace Ar/SF 6 protective atmosphere. After immersion, cooled evaluated by means optical scanning electron microscopy (SEM). Every...
Carbon‐bonded alumina foams, prepared by means of the replica technique, are typically used as metal melt filters for filtration steel due to their low wettability and good resistance towards thermal shock corrosion. According literature, there different process routes preparation carbon‐bonded example, dipping/rolling, spray‐ dip/centrifugation coating. The influence such variations on macro‐ microstructure mechanical properties ceramic foams has not been analyzed fully yet. Herein,...
Abstract Besides impurities in magnesium alloys containing aluminum, the microstructure also plays a role corrosion properties of alloy. By targeted manipulation grain size, secondary dendrite arm spacings and segregation terms amount position, are expected to be improved. For this, experiments were carried out by casting with 0, 3, 6, 9, 12 % aluminum into mold different applied cooling rates. The samples analyzed regarding composition, size spacings, as function content rate, modeled....
Abstract Red filter dust (RFD) from steel works contains up to 50 mass% iron, which therefore can serve as raw material for production. It should be possible recycle a fraction of the RFD in converter process wherein also scrap recycling is used. The aim was investigation reduction behavior iron oxide RFD. This accomplished by contact with pig containing 3.9 carbon and addition bio‐char dust, creating self‐reducing briquettes. experimental results were compared theoretical achievable...
This article presents equilibrium studies into the NdCl3 –HCl (or NaOH)–H2 O–DEHPA (di-(2-ethylhexyl) phosphoric acid)–kerosene system. The system plays a role in solvent extraction of rare earth elements from aqueous chloride solutions. Thereby neodymium is transferred organic phase consisting DEHPA solved kerosene. Measurements were taken at concentrations between 1 and 40 vol.% which prevent gelatinous phase. Results are presented tables. Three charts process variables evaluated which,...
Zur Zeit erleben die Anwendungen für Magnesiumlegierungen einen rasanten Aufschwung. Damit verbunden gewinnt das Recycling von Magnesium eine neue Bedeutung. Es wird ausgehend vom Bedarf an der Stofffluss des Magnesiums unter Einbeziehung Primärgewinnung, Verbrauches und Recyclings dargelegt. Die anfallenden Schrotte werden in Klassen eingeteilt, es Wege zur Verarbeitung Neuschrott, Altschrott Rückständen sowie wertvoller Legierungselemente aus Schrotten aufgezeigt. Utilization of magnesium...