Development of heating capabilities at MAXPEEM beamline (DEVPEEM)

Purpose and goal:

Alfa Laval, Gränges, Seco Tools together with Swerim, MAX IV and Lund University have installed and tested the new temperature control system at photoelectron microscopy beamline called MAXPEEM. The upgrade included new pyrometers as well as temperature control system. The new ways of sample preparation and mounting were also tested on samples provided by the industrial project participants: steel, clad aluminum and coated cemented carbide.

The experiments allowed to study chemical transformations on the sample surface with reproducible heating with +/- 3-5C accuracy. Expected results and effects:

The project resulted in installation and commissioning of the hardware for more precise temperature control. The system was tested at multiple experimental stations at MAX IV and is available for users. The upgraded temperature control system allowed to reproducibly follow the desired heating protocol with +/- 3-5C accuracy.

New sample preparation routines tested for samples with thin coatings: clad aluminum and coated cemented carbide. The demonstration experiments for studying chemical transformations on the sample surface during heating were carried out. Approach and implementation:

Heating control system upgrade was implemented, comprising a package of hardware and software. This includes digital pyrometers with small focus of ~1mm2, as well as the units for programmable heating. In-situ heating tests were conducted on three materials: steels, clad aluminum, and TiAlN-coated WC.

The pyrometers were calibrated in the temperature range of interest for each material. The project included two academic beamtimes where heat-induced chemical transformations of the sample surface were followed with photoelectron microscopy.