Large area deposition of graphene-containing coatings for diverse functional applications
|Coordinator||CHALMERS TEKNISKA HÖGSKOLA AKTIEBOLAG|
|Funding from Vinnova||SEK 2 098 000|
|Project duration||December 2018 - December 2020|
|Venture||The strategic innovation programme for graphene|
Purpose and goal
The long-term aspiration is to establish economical large area deposition of a new class of graphene-containing coatings with varying matrix materials, i.e. ceramic, metallic and intermetallic. As a starting point and given the specific immediate interest of the industry partners, one ceramic and one metallic matrix will be explored during the project period. Thermal spraying technique will be used to produce graphene-incorporated coatings by applying material blends as well as a novel hybrid approach simultaneously employing a powder along with graphene suspension.
Expected results and effects
The project is expected to lay a sound platform to expand the new knowledge generated to other material systems and applications. At the end of the project, the following questions will be answered that currently prevent industry from adopting thermal spraying for depositing graphene-incorporated coatings: Can we “retain” graphene if it is thermally sprayed and can it be uniformly distributed in a matrix? Are there limits to the extent to which graphene can be loaded in a certain matrix? What level of enhancement in functional properties and coating durability can be achieved?
Planned approach and implementation
Beside judicious material selection, a fundamental understanding of the process parameter-microstructure relationships are needed. This involves spraying of coatings using different spraying techniques (APS, SPS and powder suspension hybrid techniques) and different materials combinations using graphene in the form of platelets & suspension. Detailed characterization of graphene-containing coatings and functional assessment of graphene-containing coatings through burner rig and erosion testing, tribo-testing and actual engine test evaluation.