Predictive Modeling of Entrapped Argon Void Distributions in Vacuum Gas Atomized High Speed Steels
Argon void modeling links powder atomization physics to HIP kinetics, allowing buyers to set strict gas limits that prevent tool strength loss.
Micro Micro Tomography
Meaning
Non-destructive three-dimensional imaging techniques analyze the internal structure of solid materials at sub-micron scales. The micro micro tomography utilizes x-ray computed imaging to reconstruct the internal volume of a specimen without physical slicing. This method generates high-resolution cross-sectional slices that can be assembled to analyze porosity, crack distribution, pore connectivity, and phase boundaries.
It applies to battery electrodes, geologic cores, ceramic filters, and advanced composite materials.
Image Acquisition
A typical scanner consists of a micro-focus x-ray source, a rotating specimen stage, and a high-resolution digital detector. As the specimen rotates, hundreds of two-dimensional projection images are captured from different angles. Reconstruction algorithms process these projections to generate a three-dimensional voxel grid representing the attenuation coefficients of the material.
Material Characterization
Battery researchers use this tool to inspect the degradation of lithium-ion anodes and cathodes after multiple charge cycles. The high resolution reveals the formation of micro-cracks and phase detachment within the active material layers. This structural analysis helps optimize electrode slurry compositions and manufacturing parameters.
Operational Boundary
Scan times can range from several minutes to hours depending on the required resolution and specimen size. Large or highly dense specimens absorb too much x-ray energy, which limits the effective sample diameter to a few millimeters for sub-micron imaging.