Multifunctional tribometer development and performance study of CuCrZr-316L material pair for ITER application

Julien Hillairet (1) , Z.X. X Chen (1) , Viviane Turq (2) , Y.T. T Song (3) , Raphaël Laloo (2) , K. Vulliez (4) , J.M. M Bernard (1) , Q.X. X Yang (3) , C. Hernandez (1) , L. Ferreira (5) , F. Fesquet (5) , G. Lombard (1) , P. Mollard (1) , R Volpe (1) , Fabien R Ferlay (1) , S Larroque (1) , V Bruno (1) , J C Hatchressian (1) , H Xu (3)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 ASIPP - Institute of Plasma Physics, Chinese Academy of Sciences
4 LE - Laboratoire d'Etanchéité
5 CERN - European Organization for Nuclear Research

Radio-Frequency (RF) contacts are key components on the International Thermonuclear Experimental Reactor (ITER) Ion Cyclotron Resonance Heating (ICRH) antenna, and these components are facing big challenges such as 2 kA operation current load and intensive sliding under up to 250 °C in high vacuum. Stainless steel (SS) 316L and CuCrZr are most likely to be applied as base materials for the conductor and the RF contacts louvers. To evaluate the performance of the selected materials, their electrical and tribological behaviors have to be studied. A multifunctional tribometer which can mimic the ITER ICRH RF contacts' relevant working conditions was designed and built in CEA. The contact resistance (Rc) and coefficient of friction (CoF) of CuCrZr-316L pair were researched on this tribometer.

Keywords: Rh coating; CuCrZr; Thermal stress; Cracking; Hardness; Adhesion; RF contact; Tribometer; Vacuum; Contact resistance

Domains: Material chemistry; Nuclear Experiment [nucl-ex]; Materials

Julien Hillairet, Z.X. X Chen, Viviane Turq, Y.T. T Song, Raphaël Laloo, et al.. Multifunctional tribometer development and performance study of CuCrZr-316L material pair for ITER application. Tribology International, 2017, 116, pp.208-216. ⟨10.1016/j.triboint.2017.07.024⟩. ⟨cea-01851798⟩