Neutron imaging of drainage/imbition cycles of 3 commercial titanium felt porous transport layers (PTLs)

Samples Commercial titanium felt porous transport layers (PTLs) with high porosities that are commonly used in PEMWEs have been obtained from two suppliers: PTL 1: Sylatech GmbH (Walzbachtal, Germany), graded pore structure, thickness 1 mm PTL 2: NV Bekaert SA (Zwevegem, Belgium), thickness 0.5 mm PTL 3: NV Bekaert SA (Zwevegem, Belgium), thickness 1 mm Neutron imaging Laboratory: NeXT32 at Institut LaueLangevin (ILL, Grenoble, France) Neutron flux: 1.4 × 1010 n cm²/s High-resolution detector with a 20 μm thick Gadox scintillator 50 mm f./1.2 Canon imaging lens 55 mm f./1.0 objective lens Hamamatsu ORCA-Flash V3 sCOMS camera Field of view: 14.64 × 14.64 mm² Distance between object and detector: 12 mm Radiographies: Pixel size: 6.5² µm² Temporal resolution: 1/10 s Tomographies: Voxel size: 22³ µm³ Exposure time: 1.5 s Projections: 800 per 360° rotation Further information can be found in Altaf et al.