Specialists from Kazan Federal University (KFU) have for the first time applied 4D X-ray computed tomography to analyze porous materials. This innovative development will significantly increase the accuracy of assessing the impact of porosity on the properties of various materials. This is useful in both medicine and industry.
The new equipment for 4D tomography has demonstrated outstanding results, the scientists emphasized. It provided high accuracy in analyzing the dynamics of porous structures under load.
One of the key results of the study was the detection of interlayer pores in samples created using FDM additive technologies. The discovery will allow new factors to be taken into account in numerical models, which will pave the way for more accurate prediction of the properties of printed structures. Scientists will be able to predict changes in the volume of macropores and interlayer voids under load, which will help in calculating the stiffness and yield strength of products.
To conduct the experiments, a system for loading samples was developed, allowing the dynamics of porous structures to be tracked in real time. The test results showed that during elastic deformations, the volume of pores changes first, while during plastic deformations, their shape and orientation change. It is especially interesting that with small deformations, the main loss of the elastic modulus is associated with interlayer pores, which, however, "close" with increasing plastic deformation and cease to affect the behavior of the material.
Read more on the topic:
A development center for small-tonnage chemistry will be created on the basis of the KFU technopark
Technology for creating a flexible superconductor based on magnesium diboride created at KFU