Anzeige der Artikel nach Schlagwörtern: magnesium

Magnesium is the lightest structural metal and therefore a dream material for applications where fuel economy is a prerequisite. Applications of magnesium alloys are primarily motivated by their strength-to-weight ratio, ability to dampen shockwaves, close dimensional tolerance, and ease of fabrication. Magnesium alloys are therefore widely used in the construction of automobile, aerospace and ballistic missiles parts. Owing to their comparative strength and relatively lower cost, magnesium alloys are also seen as an alternative to conventional lightweight fibre metal laminates or carbon fibre composites. In this articles series in twelve parts, we will discuss from the extraction of magnesium to surface finishing of its products.

Mittels plasmachemischer Oxidation – einem Verfahren zwischen Plasmaphysik und Galvanik – wurde eine für den Körper unbedenkliche Beschichtung eines Implantats aus einer Magnesiumlegierung entwickelt.

Wie Galvaniken auf den Wandel der Mobilität reagieren sollten. Ein Gespräch mit ESI-Manager und ZVO-Automobilexperte Rainer Venz.

Die aktuelle Knappheit von Magnesium hat verdeutlicht, wie gravierend internationale Versorgungsengpässe die europäische Wirtschaft jederzeit treffen können: Windräder, Solaranlagen, Elektromobilität – alles nicht möglich ohne metallische Rohstoffe. Für die Entwicklung von Zukunftstechnologien und für die ökologische Transformation unserer Wirtschaft ist eine sichere Versorgung mit metallischen Rohstoffen wie Aluminium, Kupfer, Lithium, Mangan, Magnesium, Nickel oder Seltenen Erden daher essenziell. Durch die Veränderung und Anfälligkeit internationaler Lieferketten wird die Rohstoffversorgung jedoch immer schwieriger.

Mit TitrIC flex, dem neuen System von Metrohm zur umfassenden Wasseranalyse, kann nun vollautomatisch das gesamte Spektrum der im Wasser vorhandenen Ionen bestimmt werden. Zu diesem Zweck kombiniert TitrIC flex Titration, Direktmessung und Ionenchromatographie. Die Ergebnisse aller drei Methoden werden in einer gemeinsamen Datenbank gesammelt und in einem gemeinsamen Report bearbeitet.

There is a growing demand for light metal alloys components in aerospace and automobile fields primarily to save fuel cost. Magnesium alloys promise a great potential for various applications as lightweight structural materials. This advantage stems from their low densities and high specific strength/weight ratio. Other advantages are good electrical and thermal conductivity, good impact strength, ability to dampen shockwaves, ease of forming at room temperature, weldability, buckling resistances, ductility and pressure tightness. Despite sounding like a designers' dream metal, magnesium has two grave drawbacks that limit their widespread applications. One is their poor corrosion resistance. These alloys are prone to oxidation even at room temperature when exposed to atmosphere. The other is their relatively frail surface ­mechanical properties, e.g. hardness, wear resistance, etc. Owing to the exceptional engineering properties of magnesium alloys ample attempts have been made in last few decades to develop the suitable surface protection techniques. In this article the advances of chemical conversion coatings on the magnesium alloys are discussed for ready reference of users.

There is growing demand for light metal alloys components in aerospace and automobile fields primarily to save fuel cost. Magnesium alloys promise a great potential for various applications as lightweight structural materials. This advantage stems from their low densities and high specific strength/weight ratio. Other advantages are good electrical and thermal conductivity, good impact strength, ability to dampen shockwaves, ease of forming at room temperature, weldability, buckling resistances, ductility and pressure tightness. Despite sounding like a designers’ dream metal, magnesium has two grave drawbacks that limit their widespread applications. One is their poor corrosion resistance. These alloys are prone to oxidation even at room temperature when exposed to atmosphere. The other is their relatively frail surface mechanical properties, e.g. hardness, wear resistance, etc. Owing to the exceptional engineering properties of magnesium alloys ample attempts have been made in last few decades to develop the suitable surface protection techniques. In this article the advances of chemical conversion coatings on the magnesium alloys are discussed for ready reference of users.

There is growing demand for light metal alloys components in aerospace and automobile fields primarily to save fuel cost. Magnesium alloys promise a great potential for various applications as lightweight structural materials. This advantage stems from their low densities and high specific strength/weight ratio. Other advantages are good electrical and thermal conductivity, good impact strength, ability to dampen shockwaves, ease of forming at room temperature, weldability, buckling resistances, ductility and pressure tightness. Despite sounding like a designers' dream metal, magnesium has two grave drawbacks that limit their widespread applications: poor corrosion resistance and the relatively frail surface mechanical properties. Owing to the exceptional engineering properties of magnesium alloys ample attempts have been made in last few decades to develop suitable surface protection techniques. In this article the advances of chemical conversion coatings on the magnesium alloys are discussed.

There is a growing demand for light metal alloys components in aerospace and automobile fields primarily to save fuel cost. Magnesium alloys promise a great potential for various applications as lightweight structural materials. This advantage stems from their low densities and high specific strength/weight ratio. Other advantages are good electrical and thermal conductivity, good impact strength, ability to dampen shockwaves, ease of forming at room temperature, weldability, buckling resistances, ductility and pressure tightness. Despite sounding like a designers' dream metal, magnesium has two grave drawbacks that limit their widespread applications: poor corrosion resistance and relatively frail surface mechanical properties. Owing to the exceptional engineering properties of magnesium alloys ample attempts have been made in the last few decades to develop suitable surface protection techniques. In this article the advances of chemical conversion coatings on the magnesium alloys are discussed.

Im Jahr 1953/54 wurde am Max-Planck-Institut für Kohlenforschung in Mülheim an der Ruhr durch Karl Ziegler und Mitarbeiter ein wesentlich verbessertes Verfahren zur Herstellung von Polyethylen durch die damals sensationelle Entdeckung von Katalysatoren entwickelt, die das Aneinanderknüpfen einzelner Ethylen-Moleküle unter sehr einfachen Bedingungen und mit bisher nicht gekannter Effizienz bewirkten. Durch diese Entdeckung konnte eine ganze Klasse von Ziegler-Katalysatoren bereitgestellt werden, um auch die nächsthöheren Homologen des Ethylens wie Propen, Buten usw. in bisher unbekannte feste, kunststoffartige und teilkristalline Produkte umzuwandeln. Aber damit nicht genug. Die Katalysatoren erwiesen sich als Schlüssel für die großtechnische weltweite Herstellung der neuen vielfältigen Kunststoffe für deren Entdeckung Karl Ziegler 1963 mit dem Nobel-Preis ausgezeichnet worden ist [1].