2.2. Dry Particle Coating

The mechanofusion process was conducted with the Angmill Mechanofusion System (AMS) unit of the Picobond^® using the Picoline^® platform (Hosokawa Alpine, Augsburg, Germany). The carrier and coating materials (2% (w/w) MgSt) were premixed in a Turbula^® blender (Willy A. Bachofen Maschinenfabrik, Basel, Switzerland) at 42 rpm for 5 min. Pre-blends were then transferred to the AMS. The AMS coating started by increasing the rotor speed up to 4000 rpm within one minute and keeping it constant at 4000 rpm over 10 min.

The high-shear mixer (HSM) coating was conducted using the Picomix^® unit of the Picoline platform. A rotor speed of 500 rpm was kept constant for 15 min.

All raw materials were sieved before processing (mesh size: 250 µm), as well as the coated samples after processing. To assess the energy input to the powder, the data transfer tool of the Picoline was used. The instrument performance over the whole processes using the same powder mass was averaged and then multiplied with the respective process duration to obtain the total energy input. The procedure was then repeated without powder. The idle running energy was subtracted from the total energy input to calculate the energy input into the powder sample. All coatings were conducted at monitored relative humidity (RH) of 45% ± 15% and room temperature (20 °C to 25 °C).