Hi everyone, my name is Anjali Singhal, and I am a materials scientist in the Chemical and Structural Analysis Lab working on the Micro/Nano-CT technique.
A few months ago I posted a nano CT blog introducing this technique, how it works and why we like to use it at GE. I would like to share our recently published feature article in the Microscopy Today magazine, Micro/Nano-CT For Visualization Of Internal Structures
This article talks in detail about the various capabilities of the instrument, in the perspective of some of the amazing materials we have looked at in our lab since taking delivery of the instrument about 6 months ago. In case you are not familiar, Micro-CT is a non-destructive 3D characterization tool that uses X rays to determine the internal structure of objects through imaging of different densities within the scanned object. High-resolution laboratory-based micro-CT or nano-CT provides image resolution on the order of 300 nm. Such high resolution allows one to visualize the internal 3D structure of fine-scale features.
Micro-CT can serve as a useful tool to screen materials for defects such as cracks, delaminations, and voids from the initial phase of product development to quality control of final part fabrication. It is also widely used in metrology for inspecting components made with additive manufacturing techniques, reverse engineering, and computer-aided design (CAD) modeling. The total scan time is relatively short, depending on the shape and size of the object. Also, compared to other microscopy techniques, the sample preparation required for micro-CT imaging is minimal.
I wanted to share with you two 3D animations of two of the materials discussed in our featured article article. The first video below is a 3D rendering of pores in a carbon-epoxy composite, color coded according to their size. The material has been reduced transparent to show the pores only. The second one shows a few cracks (highlighted in red) in a fractured Ni-based superalloy sample.
Please check out the article and videos and let me know if you have any comments or questions!