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Fakultät Maschinenbau
Externer Doktorand

M.Sc. David Kokalj

David Kokalj Profilbild © LWT

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Telefon: +49 231 755-4866

Raum: 1.04

Aufgabenbereiche

  • Betreuung von Forschungs- und Entwicklungsprojekten
  • Durchführung von Industrieprojekten/-aufträgen
  • Betreuung der Vorlesungsreihe Werkstofftechnologie I
  • Vorlesung + Übung -Grundlagen der Legierungsbildung- im Rahmen der Werkstofftechnologie 1
  • Vorlesung + Übung -Binäre und ternäre Stoffdiagramme- im Rahmen der Werkstofftechnologie 1
  • Lect. + Ex. -Powder Metallurgy- within the course Materials Technology II
  • Betreuung von Studien- und Projektarbeiten bzw. Bachelor- und Masterarbeiten
  • Betreuung des Labordiffraktometers

Veröffentlichungen

2022

  • Hein M, Kokalj D, Lopes Dias NF, Stangier D, Oltmanns H, Pramanik S, Kietzmann M, Hoyer K-P, Meißner J, Tillmann W, Schaper M (2022) Low Cycle Fatigue Performance of Additively Processed and Heat-Treated Ti-6Al-7Nb Alloy for Biomedical Applications. Metals 12(1):122. doi:10.3390/met12010122

2021

  • Tillmann W, Kokalj D, Stangier D, Fu Q, Kruis FE (2021) Bias-voltage effect on the TiN nanoparticle injection into magnetron sputtered CrN thin films towards nc-TiN/nc-CrN composites. Applied Surface Science Advances 6:100149. doi:10.1016/j.apsadv.2021.100149
  • Tillmann W, Kokalj D, Stangier D, Fu Q, Kruis FE (2021) Influence of the PVD process conditions on the incorporation of TiN nanoparticles into magnetron sputtered CrN thin films. Surface and Coatings Technology 409:126935. doi:10.1016/j.surfcoat.2021.126935
  • Tillmann W, Kokalj D, Stangier D (2021) Impact of structure on mechanical properties and oxidation behavior of magnetron sputtered cubic and hexagonal MoNx thin films. Applied Surface Science Advances 5:100119. doi:10.1016/j.apsadv.2021.100119
  • Tillmann W, Lopes Dias NF, Franke C, Kokalj D, Stangier D, Thomann CA, Debus J (2021) Mechanical properties and adhesion behavior of amorphous carbon films with bias voltage controlled TixCy interlayers on Ti6Al4V. Diamond and Related Materials 115:108361. doi:10.1016/j.diamond.2021.108361
  • Tillmann W, Lopes Dias NF, Franke C, Kokalj D, Stangier D, Filor V, Mateus-Vargas RH, Oltmanns H, Kietzmann M, Meißner J, Hein M, Pramanik S, Hoyer K-P, Schaper M, Nienhaus A, Thomann CA, Debus J (2021) Tribo-mechanical properties and biocompatibility of Ag-containing amorphous carbon films deposited onto Ti6Al4V. Surface and Coatings Technology 421:127384. doi:10.1016/j.surfcoat.2021.127384
  • Tillmann W, Kokalj D, Stangier D, Fu Q, Kruis FE, Kesper L, Berges U, Westphal C (2021) On the synthesis and structural evolution of artificial CrN/TiN nanocomposites. Applied Surface Science 535:147736. doi:10.1016/j.apsusc.2020.147736

2020

  • Fu Q, Kokalj D, Stangier D, Kruis FE, Tillmann W (2020) Aerosol synthesis of titanium nitride nanoparticles by direct current arc discharge method. Advanced Powder Technology 31(9):4119–4128. doi:10.1016/j.apt.2020.08.012
  • Kokalj D, Debus J, Stangier D, Moldenhauer H, Nikolov A, Wittig A, Brümmer A, Tillmann W (2020) Controlling the Structural, Mechanical and Frictional Properties of MoSx Coatings by High-Power Impulse Magnetron Sputtering. Coatings 10(8):755. doi:10.3390/coatings10080755

2019

  • Tillmann W, Kokalj D, Stangier D, Fu Q, Kruis E (2019) Combination of an atmospheric pressured arc reactor and a magnetron sputter device for the synthesis of novel nanostructured thin films. Thin Solid Films 689:137528. doi:10.1016/j.tsf.2019.137528
  • Moldenhauer H, Wittig A, Kokalj D, Stangier D, Brümmer A, Tillmann W, Debus J (2019) Resonant Raman scattering characterization of thermally annealed HiPIMS deposited MoS coatings. Surface and Coatings Technology 377:124891. doi:10.1016/j.surfcoat.2019.124891
  • Tillmann W, Kokalj D, Stangier D, Schöppner V, Malatyali H (2019) Combining Thermal Spraying and Magnetron Sputtering for the Development of Ni/Ni-20Cr Thin Film Thermocouples for Plastic Flat Film Extrusion Processes. Coatings 9(10):603. doi:10.3390/coatings9100603
  • Tillmann W, Kokalj D, Stangier D, Schöppner V, Malatyali H (2019) Effects of AlN and BCN Thin Film Multilayer Design on the Reaction Time of Ni/Ni-20Cr Thin Film Thermocouples on Thermally Sprayed Al2O3. Sensors (Basel) 19(15). doi:10.3390/s19153414
  • Tillmann W, Hagen L, Kokalj D, Paulus M, Tolan M (2019) Temperature-Induced Formation of Lubricous Oxides in Vanadium Containing Iron-Based Arc Sprayed Coatings. Coatings 9(1):18. doi:10.3390/coatings9010018
  • Tillmann W, Kokalj D, Stangier D (2019) Influence of the deposition parameters on the texture and mechanical properties of magnetron sputtered cubic MoNx thin films. Materialia 5:100186. doi:10.1016/j.mtla.2018.100186

2018

  • Tillmann W, Kokalj D, Stangier D, Schöppner V, Benis HB, Malatyali H (2018) Influence of Cr-Content on the thermoelectric and mechanical properties of NiCr thin film thermocouples synthesized on thermally sprayed Al2O3. Thin Solid Films 663:148–158. doi:10.1016/j.tsf.2018.08.023
  • Tillmann W, Kokalj D, Stangier D (2018) Optimization of the deposition parameters of Ni-20Cr thin films on thermally sprayed Al2O3 for sensor application. Surface and Coatings Technology 344:223–232. doi:10.1016/j.surfcoat.2018.03.029
  • Tillmann W, Kokalj D, Stangier D, Paulus M, Sternemann C, Tolan M (2018) Investigation on the oxidation behavior of AlCrVxN thin films by means of synchrotron radiation and influence on the high temperature friction. Applied Surface Science 427:511–521. doi:10.1016/j.apsusc.2017.09.029

2017

  • Tillmann W, Hagen L, Kokalj D (2017) Embedment of eutectic tungsten carbides in arc sprayed steel coatings. Surface and Coatings Technology 331:153–162. doi:10.1016/j.surfcoat.2017.10.044
  • Tillmann W, Kokalj D, Stangier D, Paulus M, Sternemann C, Tolan M (2017) Investigation of the influence of the vanadium content on the high temperature tribo-mechanical properties of DC magnetron sputtered AlCrVN thin films. Surface and Coatings Technology 328:172–181. doi:10.1016/j.surfcoat.2017.08.046
  • Tillmann W, Hagen L, Kokalj D (2017) Spray Characteristics and Tribo-Mechanical Properties of High-Velocity Arc-Sprayed WC-W2C Iron-Based Coatings. Journal of Thermal Spray Technology 26(7):1685–1700. doi:10.1007/s11666-017-0605-y
  • Tillmann W, Hagen L, Kokalj D, Paulus M, Tolan M (2017) A Study on the Tribological Behavior of Vanadium-Doped Arc Sprayed Coatings. Journal of Thermal Spray Technology 26(3):503–516. doi:10.1007/s11666-017-0524-y

2016

  • Tillmann W, Hagen L, Nellesen J, Kokalj D (2016) Production of finely structured coating systems with the aid of ultrasonic excitation during arc wire spraying. Thermal Spray Bulletin 68(1):24–32
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