Microscopy of Nanoscale Structures & Mechanisms

NEWS

Master thesis to assign!

In the field of "Transmission electron microscopic (TEM) investigations of nanoscale, ternary multilayer coatings in the Ru/Al/Hf system" in cooperation with IAM-AWP and LEM (from 01.01.2022)

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Master thesis to assign!

In the field of "Analytical Electron Microscopy on High Temperature Materials (Single-Crisalline Superalloys) for Aerospace Engines" in the new research group MNM at LEM. (as of now)

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Welcome Kristian Kraft!

We are pleased to welcome Mr. Kristian Kraft to the MNM-LEM team. Since 01.09.2022 he is working on his master thesis on "Identification of chemical structures and structural changes of 3D microstructures as a function of pressure and temperature". We wish him good luck!

Huang_Yiling
Welcome Yiling Huang!

We are pleased to welcome Miss Yiling Huang to the MNM-LEM team. She will stay with us for one year with her CSC scholarship and started working on her visiting PhD on April 1, 2022 in the area of "creep induced defects in single crystal superalloy". We wish her much success!

Welcome Huichao Wu!

We are pleased to welcome Mr. Huichao Wu to the MNM.-LEM-team. Since March.03.2022 he has started his master thesis on the topic “Investigation of the creep-induced deformation mechanism of a eutectic Mo-Si-Ti alloy by transmission electron microscopy (TEM)”. We wish him much success!

Welcome Hemanth Thota!

We are pleased to welcome Mr. Hemanth Thota to the MNM team. He started his PhD on January 1, 2022 and will be working in the area of "High Temperature Materials" in the project GRK 2561. We wish him much success!

Sedlak, Marina NEWS
Welcome Marina Sedlak!

We welcome Marina Sedlak from France! We are excited to start with her a new collaboration on piezoceramics with Manuel Hinterstein from IAM-CMT.

Welcome Dr.-Ing. C. Dolle!

We are pleased to welcome Dr.-Ing. Christian Dolle to the MNM team. He will strengthen us in our research activities on electron beam sensitive materials in the area of the ​​3DMM2O research. We are looking forward to the collaboration.

Welcome Q. Sun!

We look forward to welcoming Ms. Qing Sun to the MNM team. She started her PhD on January 1st, 2021 and will study electron beam sensitive SURMOFs materials. We wish her every success.

Situ Halter NEWS
New in situ TEM Halter

The new in situ TEM holder has arrived and we are excited to perform first experiments.

Christophe Lopes NEWS
Welcome C. Lopes!

We look forward to welcoming Mr. Christophe Lopes as a new member of our team from November 1st. We wish him every success with his master's thesis.

Welcome Z. Long!

We look forward to welcoming Ms. Zhongmin Long as a support in our team from November 1st! She is interested deformation mechanisms of Superalloys. We wish her every success with her doctoral thesis.

Research areas

We are curios to understand how nano- and microstructures of materials form during processing and service and how they affect structural and functional properties. We presently work on single crystal superalloys (SX), high entropy alloys (HEA), functional magnetic Heusler and half Heusler (H/hH) compounds and new small-scale nano and micro engineered systems (excellence cluster 3DMM2O) on the atomic (crystals) respectively molecular (soft matter) scale.

Electron microscopy enables us to dive in into the nano-cosmos of materials and to discover yet unknown fundamental processes and materials phenomena.

Thus, we are fascinated

  • to see how plastic deformation unfolds in microstructures of high-performance metallic materials, where we aim at understanding the role of dislocations, planar faults and solute segregation to these crystal defects.
  • to directly observe solid state reactions like phase decompositions and coarsening processes in multiphase materials on the nanoscale and to explore how these processes affect functional and structural properties.
  • to explore which nano- and microstructural configurations rationalize magnetic properties and how these can be optimized.
  • to characterize Metal Organic Frameworks (MOF), to study their synthesis and to explore possible nanoscale applications.

Our group closely collaborates with national and international research partners.

Please contact us in case you are interested to collaborate. We always welcome suggestions for collaborations and our group represents a fruitful scientific environment for postdoctoral researchers from all over the world. (applications welcome)

We are looking forward to hearing from you.

Yolita M. Eggeler, and all members of the MNM-group at LEM


Publications


Electrospun carbon nanofibre-assisted patterning of metal oxide nanostructures
Islam, M.; Dolle, C.; Sadaf, A.; Weidler, P. G.; Sharma, B.; Eggeler, Y. M.; Mager, D.; Korvink, J. G.
2022. Microsystems & Nanoengineering, 8 (1), Art.Nr. 71. doi:10.1038/s41378-022-00409-8Full textFull text of the publication as PDF document
Improved work hardening capability and ductility of an additively manufactured and deformed Al-Mn-Mg-Sc-Zr alloy
Schliephake, D.; Lopes, C.; Eggeler, Y. M.; Chen, H.; Freudenberger, J.; Bayoumy, D.; Huang, A. J.; Kauffmann, A.
2022. Journal of Alloys and Compounds, Artkl.Nr.: 166499. doi:10.1016/j.jallcom.2022.166499
A novel nitridation- and pesting-resistant Cr-Si-Mo alloy
Hinrichs, F.; Kauffmann, A.; Tirunilai, A. S.; Schliephake, D.; Beichert, B.; Winkens, G.; Beck, K.; Ulrich, A. S.; Galetz, M. C.; Long, Z.; Thota, H.; Eggeler, Y.; Pundt, A.; Heilmaier, M.
2022. Corrosion Science, 207, Art.-Nr.: 110566. doi:10.1016/j.corsci.2022.110566
Solid and Hollow Poly( p -xylylene) Particles Synthesis via Metal–Organic Framework-Templated Chemical Vapor Polymerization
Begum, S.; Behboodi-Sadabad, F.; Pramudya, Y.; Dolle, C.; Kozlowska, M.; Hassan, Z.; Mattern, C.; Gorji, S.; Heißler, S.; Welle, A.; Koenig, M.; Wenzel, W.; Eggeler, Y. M.; Bräse, S.; Lahann, J.; Tsotsalas, M.
2022. Chemistry of Materials, 34 (14), 6268–6278. doi:10.1021/acs.chemmater.2c00111
Metal–Metal Bonding as an Electrode Design Principle in the Low-Strain Cluster Compound LiScMo 3 O 8
Wyckoff, K. E.; Kaufman, J. L.; Baek, S. W.; Dolle, C.; Zak, J. J.; Bienz, J.; Kautzsch, L.; Vincent, R. C.; Zohar, A.; See, K. A.; Eggeler, Y. M.; Pilon, L.; Van der Ven, A.; Seshadri, R.
2022. Journal of the American Chemical Society, 144 (13), 5841–5854. doi:10.1021/jacs.1c12070
Ultra-flexible β-Cu2-δSe-based p-type printed thermoelectric films
Mallick, M. M.; Sarbajna, A.; Rösch, A. G.; Franke, L.; Geßwein, H.; Eggeler, Y. M.; Lemmer, U.
2021. Applied materials today, 101269. doi:10.1016/j.apmt.2021.101269
Disordered interfaces enable high temperature thermal stability and strength in a nanocrystalline aluminum alloy
Balbus, G. H.; Kappacher, J.; Sprouster, D. J.; Wang, F.; Shin, J.; Eggeler, Y. M.; Rupert, T. J.; Trelewicz, J. R.; Kiener, D.; Maier-Kiener, V.; Gianola, D. S.
2021. Acta materialia, 215, Art.-Nr.: 116973. doi:10.1016/j.actamat.2021.116973
Influence of plastic deformation on the magnetic properties of Heusler MnAuAl
Levin, E. E.; Kitchaev, D. A.; Eggeler, Y. M.; Mayer, J. A.; Behera, P.; Gianola, D. S.; Van der Ven, A.; Pollock, T. M.; Seshadri, R.
2021. Physical review materials, 5 (1), Art.-Nr.: 014408. doi:10.1103/PhysRevMaterials.5.014408
Design of Nickel-Cobalt-Ruthenium multi-principal element alloys
Charpagne, M. A.; Vamsi, K. V.; Eggeler, Y. M.; Murray, S. P.; Frey, C.; Kolli, S. K.; Pollock, T. M.
2020. Acta materialia, 194, 224–235. doi:10.1016/j.actamat.2020.05.003
Interfacial structure and strain accommodation in two-phase Nb Co Sn Heusler intermetallics
Eggeler, Y. M.; Levin, E. E.; Wang, F.; Kitchaev, D. A.; Van der Ven, A.; Seshadri, R.; Pollock, T. M.; Gianola, D. S.
2020. Physical review materials, 4 (9), Art.-Nr.: 093601. doi:10.1103/PhysRevMaterials.4.093601
The Effect of Alloying on the Thermophysical and Mechanical Properties of Co–Ti–Cr-Based Superalloys
Zenk, C. H.; Volz, N.; Bezold, A.; Huber, L.-K.; Eggeler, Y. M.; Spiecker, E.; Göken, M.; Neumeier, S.
2020. Superalloys 2020: Proceedings of the 14th International Symposium on Superalloys. Ed.: S. Tin, 909–919, Springer. doi:10.1007/978-3-030-51834-9_89
Using Rapid Thermal Annealing for Studying Early Stages of High-Temperature Oxidation of Superalloys
Kubacka, D.; Eggeler, Y. M.; Volz, N.; Neumeier, S.; Spiecker, E.
2020. Superalloys 2020: Proceedings of the 14th International Symposium on Superalloys. Ed.: S. Tin, 763–770, Springer. doi:10.1007/978-3-030-51834-9_74
Tension/Compression asymmetry of a creep deformed single crystal Co-base superalloy
Lenz, M.; Eggeler, Y. M.; Müller, J.; Zenk, C. H.; Volz, N.; Wollgramm, P.; Eggeler, G.; Neumeier, S.; Göken, M.; Spiecker, E.
2019. Acta materialia, 166, 597–610. doi:10.1016/j.actamat.2018.12.053
Characterisation of Misfit Dislocations at Semicoherent Interfaces in Biphasic Functional Heusler Intermetallics
Eggeler, Y.; Levin, E. E.; Wang, F.; Seshadri, R.; Pollock, T. M.; Gianola, D. S.
2019. Microscopy and microanalysis, 25 (S2), 1916–1917. doi:10.1017/S1431927619010316
On the nucleation of planar faults during low temperature and high stress creep of single crystal Ni-base superalloys
Wu, X.; Dlouhy, A.; Eggeler, Y. M.; Spiecker, E.; Kostka, A.; Somsen, C.; Eggeler, G.
2018. Acta materialia, 144, 642–655. doi:10.1016/j.actamat.2017.09.063
Identification of a ternary -phase in the Co-Ti-W system – An advanced correlative thin-film and bulk combinatorial materials investigation
Naujoks, D.; Eggeler, Y. M.; Hallensleben, P.; Frenzel, J.; Fries, S. G.; Palumbo, M.; Koßmann, J.; Hammerschmidt, T.; Pfetzing-Micklich, J.; Eggeler, G.; Spiecker, E.; Drautz, R.; Ludwig, A.
2017. Acta materialia, 138, 100–110. doi:10.1016/j.actamat.2017.07.037
Combining advanced TEM techniques for full characterization of extended defects in creep-deformed single crystal superalloys
Spiecker, E.; Müller, J.; Eggeler, Y. M.; Lenz, M.
2016. European Microscopy Congress 2016: Proceedings, 780–781, Wiley-VCH Verlag. doi:10.1002/9783527808465.EMC2016.8697
Analysing the tension/compression asymmetry in creep deformed Co-base superalloys using electron microscopy
Lenz, M.; Eggeler, Y.; Schweizer, P.; Zenk, C.; Neumeier, S.; Göken, M.; Wollgramm, P.; Eggeler, G.; Spiecker, E.
2016. European Microscopy Congress 2016: Proceedings, 221–222, Wiley-VCH Verlag. doi:10.1002/9783527808465.EMC2016.6787
Planar defect formation in the ′ phase during high temperature creep in single crystal CoNi-base superalloys
Eggeler, Y. M.; Müller, J.; Titus, M. S.; Suzuki, A.; Pollock, T. M.; Spiecker, E.
2016. Acta materialia, 113, 335–349. doi:10.1016/j.actamat.2016.03.077