Supersonic spraying of graphene/MXene-based conductive wear-resistant coatings for electrification

Purpose and goal:

Our goal is to explore the feasibility of using supersonic sprayed coatings of conductive 2D materials (graphene or MXene) to fabricate advanced electrification products of low friction and low electric contact resistance to extend their lifetime and retain good electrical performance. In this project, we have managed to spray graphene/copper composite coatings with acceptable performance for some applications in electrification industry.

Expected results and effects:

We have developed and optimized the supersonic spraying processes to fabricate graphene/MXene-based conductive wear-resistant coatings on different metal substrates with good uniformity and controllable thickness. The best graphene/copper composite coatings have exhibited friction about 3-4 times lower than pure copper and meanwhile retain similar electrical contact resistance. The process has great potential to enhance several industrial electrification products.

Approach and implementation:

This project was conducted based on the collaboration between KTH and ABB. KTH prepared the graphene/MXene materials, developed the supersonic spraying process, and fabricated various conductive low-friction coatings. ABB conducted all the tribological and electrical tests, and analyzed and evaluated the performance of the 2D materials-based coatings.