Microstructures of 3 commercial titanium felt porous transport layers (PTLs)

Sample preparation 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 X-ray micro-computed tomography (µ-CT) µ-CT device: Procon CT alpha from Procon X-ray GmbH (Germany) Acquisation parameters: Source voltage: 50 kV Current: 160 µA Exposure time: 2000 ms Number of projections per 360°: 1200 Image reconstruction software: Volex (Fraunhofer ISS, Fürth, Germany) Image processing Binarization was achieved by global thresholding using the method from Otsu. Image processing was conducted with ImageJ 2.1051 (plugins MorphoLibJ and BoneJ). Further information can be found in Altaf et al. (2025). Data files The dataset includes 6 files, which are the raw 3D image of the PTL and its binarized image, respectively: PTL_1_img@raw_res@1314x1394x138_vxl@3.9x3.9x3.9_uint8.tif:Contents: Raw 3D image of PTL 1Resolution: 1314 × 1394 × 138 voxelsVoxel size: 3.9 µm (in each dimension)Encoding: uint16 PTL_1_img@binarized_res@1314x1394x138_vxl@3.9x3.9x3.9_uint8.tif:Contents: Binarized 3D image of PTL 1Interpretation: solid = 1, voidage = 0Resolution: 1314 × 1394 × 138 voxelsVoxel size: 3.9 µm (in each dimension)Encoding: uint8 PTL_2_img@raw_res@1314x1394x89_vxl@3.9x3.9x3.9_uint16.tif:Contents: Raw 3D image of PTL 2Resolution: 1314 × 1394 × 89 voxelsVoxel size: 3.9 µm (in each dimension)Encoding: uint16 PTL_2_img@binarized_res@1314x1394x89_vxl@3.9x3.9x3.9_uint8.tif:Contents: Binarized 3D image of PTL 2Interpretation: solid = 1, voidage = 0Resolution: 1314 × 1394 × 89 voxelsVoxel size: 3.9 µm (in each dimension)Encoding: uint8 PTL_3_img@raw_res@1314x1394x203_vxl@3.9x3.9x3.9_uint16.tif:Contents: Raw 3D image of PTL 3Resolution: 1314 × 1394 × 203 voxelsVoxel size: 3.9 µm (in each dimension)Encoding: uint16 PTL_3_img@binarized_res@1314x1394x203_vxl@3.9x3.9x3.9_uint8.tif:Contents: Binarized 3D image of PTL 3Interpretation: solid = 1, voidage = 0Resolution: 1314 × 1394 × 203 voxelsVoxel size: 3.9 µm (in each dimension)Encoding: uint8