Dr. Christian Greiner

Group Leader

Full Profile

Tel.: +49 721 608-26407
Fax: +49 721 608-24567
Email: greiner∂kit edu

IAM-CMS, KIT
Gebäude 30.48 (MZE)
Strasse am Forum 7
76131 Karlsruhe

Group

Research

The group focuses on materials science aspects of materials under a tribological load.

Our main research topics are:

The elementary mechanisms for microstructural and chemical changes
The materials science origins of friction and wear
Size effects
Contact mechanics
Bio-inspired materials and structures
Laser surface texturing
Data Science in tribology

We develop and build our own equipment and instrumentation, e.g. an extremely high resolution in situ reciprocating tribometer
Make use of ultra-high resolution electron and ion microscopy, including 3D reconstruction techniques
Morphologically texture surfaces by means of laser radiation
Employ modern x-ray techniques, including from synchrotron sources
Collaborate with scientists on an international basis

With this unique combination of scientific expertise and analytical tools we aim at strategically tayloring materials and microstructures for lower friction and less wear.

We always have very attractive topics available for bachelor and master theses, so please do contact us in case you are interested in joining the group!

Tribometry

Developing multimodal in-situ tribometry: a core activity in the ERC Starting Grant project TriboKey

Tribo-oxidation

Copper oxide formation under tribological loading. (a) TEM lamellae extraction from sliding track (b-d) Cross-sectional HAADF-STEM images (from TEM lamellae) at varius stages of the sliding sequence.

Microscopy

3D-EBSD: crystallographic orientation in 3D, here within a copper wear track.

Group Members
Name	Focus	E-Mail	Tel.
Garabedian, Nikolay Postdoctoral Fellow (Alexander von Humboldt)	Materials Tribology, Linked Data Science, Nanotribology	nikolay garabedianSys8∂kit edu	+49 721 204 327-39
Rau, Julia Ph.D. Candidate	Elementary Mechanisms of Tribo-oxidation	julia lehmannBvn5∂kit edu
Haug, Christian Ph.D. Candidate	Ph.D. Candidate	christian haugPgi2∂kit edu	+49 721 204 327-41
Dollmann, Antje Ph.D. Candidate	Microstructural Evolution of High-entropy Alloys under Tribological Load	antje dollmannApd5∂kit edu	+49 721 204 327-38
Li, Yulong Ph.D. Candidate	Abrasive Wear, Laser Surface Texturing	yulong liTwk1∂partner kit edu	+49 721 204 327-39
Blatter, Ines M.Sc. Student		uifjmUre7∂student kit edu
Meyer, Franziska M.Sc. Student	3D-Dislocation-Configuration under Tribological Load	uneiwKih0∂student kit edu

Alumni

Name	Focus Area
Matz, Patrick,
Merkle, Lena,
Bieber, Beatrix,
Sutschet, Susanne,
Chen, Xiang, Postdoc
Becker, Sarah, Ph.D.
Liu, Zhilong, Ph.D.
Popp, Uwe,
Braun, Daniel, Ph.D.
Messer, Philipp,
Schneider, Stefan,
Welter, Vasco,
Schäfer, Michael,
del Gardo, Thais,
Wettich, Helene,
Schmidt, Oliver,

*Name*	Focus Area
Schweiger, Max,
Mersch, Simon,
Laube, Stephan,
Günther, Elisabeth,
Heinrich, Julius,
Kurpiers, Chantal,
Salgando, Leonardo,
Merz, Tobias,
Wolff, Karsten,
Lahane, Pratik,
Okle, Philipp,
Otero, Ruben,
Eberle, Valerie,
Roskosch, Thomas,
Aeenehvand, Fatemeh,

Available Bachelor's and Master's Theses
Title	Title
Data Science Techniques Applied in Materials Tribology	Experimental Tribology and Material Science

Publications

On the origin of microstructural discontinuities in sliding contacts: A discrete dislocation plasticity analysis.
Xu, Y.; Ruebeling, F.; Balint, D.; Greiner, C.; Dini, D.
2021. International Journal of Plasticity, 138, Art.-Nr.: 102942. doi:10.1016/j.ijplas.2021.102942

Raw Data to publication on the effect of different surface treatments on tribological properties of additively manufactured samples. "Tribological Performance of Additively- Manufactured AISI H13 Steel in Different Surface Conditions".
Greiner, C.; Günther, E.
2021, February 18. doi:10.5445/IR/1000129689

Effect of temperature on the tribo-oxidation of high-purity copper.
Lehmann, J.; Schmidt, O.; Schneider, R.; Greiner, C.
2020, September 24. Materials Science and Engineering Congress (MSE 2020), Online, September 22–25, 2020

Characterization of the Microstructure After Composite Peening of Aluminum.
Seitz, M.; Dürrschnabel, M.; Kauffmann, A.; Kurpiers, C.; Greiner, C.; Weidenmann, K. A.
2021. Advanced engineering materials, 23 (2), Art.Nr. 2000575. doi:10.1002/adem.202000575

Site-Specific Controlled Growth of Coiled Lambda-Shaped Carbon Nanofibers for Potential Application in Catalyst Support and Nanoelectronics.
Lutz, C.; Bog, U.; Thelen, R.; Syurik, J.; Malik, S.; Greiner, C.; Hoelscher, H.; Hirtz, M.
2020. ACS applied nano materials. doi:10.1021/acsanm.0c01374

Tribological performance and microstructural evolution of α-brass alloys as a function of zinc concentration.
Liu, Z.; Messer-Hannemann, P.; Laube, S.; Greiner, C.
2020. Friction. doi:10.1007/s40544-019-0345-8

Microstructural changes in CoCrFeMnNi under mild tribological load.
Dollmann, A.; Kauffmann, A.; Heilmaier, M.; Haug, C.; Greiner, C.
2020. Journal of materials science, 55 (26), 12353–12372. doi:10.1007/s10853-020-04806-0

Raw Data to manuscript on tribologically induced oxidation.
Lehmann, J.; Schneider, R.; Greiner, C.
2020, March 23. doi:10.5445/IR/1000117786

Sliding Velocity and Exposure Time Affect Tribologically-Induced Oxidation in Copper.
Lehmann, J.; Greiner, C.; Schneider, R.
2020, January 30. 22nd International Colloquium Tribology (2020), Ostfildern, Germany, January 28–30, 2020

Solid solution strengthening and deformation behavior of single-phase Cu-base alloys under tribological load.
Laube, S.; Kauffmann, A.; Ruebeling, F.; Freudenberger, J.; Heilmaier, M.; Greiner, C.
2020. Acta materialia, 185, 300–308. doi:10.1016/j.actamat.2019.12.005

Velocity-dependence of Tribologically-induced Oxidation of High-purity Copper.
Lehmann, J.; Schneider, R.; Greiner, C.
2019, September 4. 46th Leeds-Lyon Symposium on Tribology (2019), Lyon, France, September 2–4, 2019

Solids Under Extreme Shear: Friction-Mediated Subsurface Structural Transformations.
Greiner, C.; Gagel, J.; Gumbsch, P.
2019. Advanced materials, 31 (26), Art.Nr.: 1806705. doi:10.1002/adma.201806705

Formation of copper oxide clusters in high-purity copper under a reciprocating tribological load.
Lui, Z.; Lehmann, J.; Patzig, C.; Selle, S.; Höche, T.; Gumbsch, P.; Greiner, C.
2018, June 27. Gordon Research Conference on Tribology - Progress in Tribology at the Interface Between Disciplines (GRC 2018), Lewiston, ME, USA, June 24–29, 2018

Copper oxide cluster formation under a reciprocating tribological load in high-purity copper.
Lui, Z.; Lehmann, J.; Patzig, C.; Selle, S.; Höche, T.; Gumbsch, P.; Greiner, C.
2018, September 27. Materials Science and Engineering Congress (MSE 2018), Darmstadt, Germany, September 26–28, 2018

Bio-inspired scale-like surface textures and their tribological properties.
Lehmann, J.; Matz, P.; Schäfer, M.; Greiner, C.
2017, May 30. 644. Wilhelm und Else Heraeus Seminar (2017), Bad Honnef, Germany, May 28–31, 2017

Influence of Sliding Velocity on the Tribologically-Induced Oxidation in High-Purity Copper.
Lehmann, J.; Liu, Z.; Gumbsch, P.; Greiner, C.
2019, April 25. Spring Meeting and Exhibit (MRS 2019), Phoenix, AZ, USA, April 22–26, 2019

Formation of copper oxide clusters in high-purity copper under a reciprocating tribological load.
Liu, Z.; Lehmann, J.; Patzig, C.; Selle, S.; Höche, T.; Gumbsch, P.; Greiner, C.
2018, June 23. Gordon Research Seminar on Tribology - Progress in Tribology at the Interface Between Disciplines (GRS 2018), Lewiston, ME, USA, June 23–24, 2018

Carbon Nanofibers: Locally Controlled Growth of Individual Lambda-Shaped Carbon Nanofibers.
Lutz, C.; Bog, U.; Loritz, T.; Syurik, J.; Malik, S.; Kumar, C. N. S.; Kübel, C.; Bruns, M.; Greiner, C.; Hirtz, M.; Hölscher, H.
2019. Small, 15 (7), 1970036. doi:10.1002/smll.201970036

Nano-scale surface steps as the origin of friction anisotropy of snake scales.
Wu, W.; Yu, S.; Greiner, C.; Gomard, G.; Hölscher, H.
2019. DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM), Fachverband Oberflächenphysik (2019), Regensburg, Germany, March 31–April 5, 2019

Glassomer-Processing Fused Silica Glass Like a Polymer.
Kotz, F.; Schneider, N.; Striegel, A.; Wolfschläger, A.; Keller, N.; Worgull, M.; Bauer, W.; Schild, D.; Milich, M.; Greiner, C.; Helmer, D.; Rapp, B. E.
2018. Advanced materials, 30 (22), 1707100. doi:10.1002/adma.201707100

Locally Controlled Growth of Individual Lambda-Shaped Carbon Nanofibers.
Lutz, C.; Bog, U.; Loritz, T.; Syurik, J.; Malik, S.; Kumar, C. N. S.; Kübel, C.; Bruns, M.; Greiner, C.; Hirtz, M.; Hölscher, H.
2019. Small, Article no 1803944. doi:10.1002/smll.201803944

Friction reduction through biologically inspired scale-like laser surface textures.
Schneider, J.; Djamiykov, V.; Greiner, C.
2018. Beilstein journal of nanotechnology, 9, 2561–2572. doi:10.3762/bjnano.9.238

Characterization of the microscopic tribological properties of sandfish (Scincus scincus) scales by atomic force microscopy.
Wu, W.; Lutz, C.; Mersch, S.; Thelen, R.; Greiner, C.; Gomard, G.; Hölscher, H.
2018. Beilstein journal of nanotechnology, 9, 2618–2627. doi:10.3762/bjnano.9.243

Microstructure evolution and deformation mechanisms during high rate and cryogenic sliding of copper.
Chen, X.; Schneider, R.; Gumbsch, P.; Greiner, C.
2018. Acta materialia, 161, 138–149. doi:10.1016/j.actamat.2018.09.016

Nanocomposites: Glassomer-Processing Fused Silica Glass Like a Polymer (Adv. Mater. 22/2018).
Kotz, F.; Schneider, N.; Striegel, A.; Wolfschläger, A.; Keller, N.; Worgull, M.; Bauer, W.; Schild, D.; Milich, M.; Greiner, C.; Helmer, D.; Rapp, B. E.
2018. Advanced materials, 30 (22), 1870151. doi:10.1002/adma.201870151

Stages in the tribologically-induced oxidation of high-purity copper.
Liu, Z.; Patzig, C.; Selle, S.; Höche, T.; Gumbsch, P.; Greiner, C.
2018. Scripta materialia, 153, 114–117. doi:10.1016/j.scriptamat.2018.05.008

The origin of surface microstructure evolution in sliding friction.
Greiner, C.; Liu, Z.; Schneider, R.; Pastewka, L.; Gumbsch, P.
2018. Scripta materialia, 153, 63–67. doi:10.1016/j.scriptamat.2018.04.048

Transparent, abrasion-insensitive superhydrophobic coatings for real-world applications.
Helmer, D.; Keller, N.; Kotz, F.; Stolz, F.; Greiner, C.; Nargang, T. M.; Sachsenheimer, K.; Rapp, B. E.
2017. Scientific reports, 7 (1), Art.Nr. 15078. doi:10.1038/s41598-017-15287-8

Laser textured surfaces for mixed lubrication: Influence of aspect ratio, textured area and dimple arrangement.
Schneider, J.; Braun, D. A.; Greiner, C.
2017. Lubricants, 5 (3), Art. Nr.: 32. doi:10.3390/lubricants5030032

Gecko-Inspired Nanomaterials.
Greiner, C.
2007. Bio-mimetic and Bio-inspired Nanomaterials for Life Sciences, Wiley-VCH Verlag. doi:10.1002/9783527610419.ntls0203

Sequence of Stages in the Microstructure Evolution in Copper under Mild Reciprocating Tribological Loading.
Greiner, C.; Liu, Z.; Strassberger, L.; Gumbsch, P.
2016. ACS applied materials & interfaces, 8 (24), 15809–15819. doi:10.1021/acsami.6b04035

Haften wie ein Gecko.
Greiner, C.; Hölscher, H.
2016. Physik in unserer Zeit, 47 (3), 116–122. doi:10.1002/piuz.201601422

Bio-inspired scale-like surface textures and their tribological properties.
Schaefer, M.; Greiner, C.
2015. Bioinspiration & biomimetics, 10 (4), Art.Nr.:044001. doi:10.1088/1748-3190/10/4/044001

Chronology of the microstructure evolution for pearlitic steel under unidirectional tribological loading.
Wolff, K.; Liu, Z.; Braun, D.; Schneider, J.; Greiner, C.
2016. Tribology international, 102, 540–545. doi:10.1016/j.triboint.2016.06.016

Liquid Glass: A Facile Soft Replication Method for Structuring Glass.
Kotz, F.; Plewa, K.; Bauer, W.; Schneider, N.; Keller, N.; Nargang, T.; Helmer, D.; Sachsenheimer, K.; Schäfer, M.; Worgull, M.; Greiner, C.; Richter, C.; Rapp, B.
2016. Advanced materials, 28 (23), 4646–4650. doi:10.1002/adma.201506089

Optimum dimple diameter for friction reduction with laser surface texturing: the effect of velocity gradient.
Greiner, C.; Merz, T.; Braun, D.; Codrignani, A.; Magagnato, F.
2015. Surface topography, 3 (4). doi:10.1088/2051-672X/3/4/044001

Contact Splitting and the Effect of Dimple Depth on Static Friction of Textured Surfaces.
Greiner, C.; Schäfer, M.; Popp, U.; Gumbsch, P.
2014. ACS Applied Materials & Interfaces, 6 (11), 7986–7990. doi:10.1021/am500879m

Materials Tribology