Spiegel, M.: Corrosion protection and electronic conductivity: Spinel forming stainless steels as CCC for MCFC. Gordon Research Conference on High Temperature Corrosion, New London, NH, USA (2003)
Parezanovic, I.; Spiegel, M.: Surface modification of different Fe–Si and Fe–Mn alloys by oxidation/reduction treatments. Eurocorr 2003, Budapest, Hungary (2003)
Li, Y. S.; Spiegel, M.: Degradation performance of Al-containing alloys and intermetallics by molten ZnCl2/KCl. Corrosion Science in the 21th Century, UMIST Manchester, UK (2003)
Spiegel, M.: Factors affecting the high temperature corrosion resistance of coatings in waste fired plant. Corrosion Science in the 21th Century, UMIST Manchester, UK (2003)
Spiegel, M.; Parezanovic, I.; Strauch, E.; Grabke, H. J.: Spinel forming stainless steels as possible current collector materials for molten carbon ate fuel cells. Fuel Cells Science and Technology, Amsterdam, The Netherlands (2002)
Spiegel, M.; Warnecke, R.: Korrosion hochlegierter Stähle und nichtmetallischer Werkstoffe unter Müll verbrennungsbedingungen. VDI Fachtagung: ‚Korrosion in energieerzeugenden Anlagen’, Würzburg (2002)
Spiegel, M.; Zahs, A.; Grabke, H. J.: Fundamental aspects of chlorine induced corrosion in power plants. Invited lecture on the Workshop: ‘Life cycle issues in advanced energy systems’, Woburn, UK (2002)
Genchev, G.; Cox, K.; Sarfraz, A.; Bosch, C.; Spiegel, M.; Erbe, A.: Sour corrosion – Investigation of anodic iron sulfide layer growth in saturated H2S saline solutions. Gordon Research Conference-Aqueous Corrosion, New London, NH, USA (2014)
Magnetic properties of magnetocaloric materials is of utmost importance for their functional applications. In this project, we study the magnetic properties of different materials with the final goal to discover new magnetocaloric materials more suited for practical applications.
In this project, we work on a generic solution to design advanced high-entropy alloys (HEAs) with enhanced magnetic properties. By overturning the concept of stabilizing solid solutions in HEAs, we propose to render the massive solid solutions metastable and trigger spinodal decomposition. The motivation for starting from the HEA for this approach…
This study investigates the mechanical properties of liquid-encapsulated metallic microstructures created using a localized electrodeposition method. By encapsulating liquid within the complex metal microstructures, we explore how the liquid influences compressive and vibrational characteristics, particularly under varying temperatures and strain…
We have studied a nanocrystalline AlCrCuFeNiZn high-entropy alloy synthesized by ball milling followed by hot compaction at 600°C for 15 min at 650 MPa. X-ray diffraction reveals that the mechanically alloyed powder consists of a solid-solution body-centered cubic (bcc) matrix containing 12 vol.% face-centered cubic (fcc) phase. After hot compaction, it consists of 60 vol.% bcc and 40 vol.% fcc. Composition analysis by atom probe tomography shows that the material is not a homogeneous fcc–bcc solid solution
Local lattice distortion is one of the core effects in complex concentrated alloys (CCAs). It has been expected that the strength CCAs can be improved by inducing larger local lattice distortions. In collaboration with experimentalists, we demonstrated that VCoNi has larger local lattice distortions and indeed has much better strength than the…
Laser Powder Bed Fusion (LPBF) is the most commonly used Additive Manufacturing processes. One of its biggest advantages it offers is to exploit its inherent specific process characteristics, namely the decoupling the solidification rate from the parts´volume, for novel materials with superior physical and mechanical properties. One prominet…
The aim of the current study is to investigate electrochemical corrosion mechanisms by examining the metal-liquid nanointerfaces. To achieve this, corrosive fluids will be strategically trapped within metal structures using novel additive micro fabrication techniques. Subsequently, the nanointerfaces will be analyzed using cryo-atom probe…
In this project we pursue recent developments in the field of austenitic steels with up to 18% reduced mass density. The alloys are based on the Fe-Mn-Al-C system.