Page 4 - Shimadzu Xctal 5000

Both Wide Field of View and
Detailed Structural Observations Applications (Dark-field Images)

Detailed Structural Observations GFRP Injection Molded Items

In injection molding, molding defects can occur when a linear mark (weld line) forms where the molten resins meet.
A dark-field image is suited to observations of fine structure, including cracks and the flow of fiber bundles, over a With this system, dark-field images can be obtained while changing the angle of the sample, so the fiber flow can be
wide field of view. analyzed, enabling the position of weld lines to be specified.
In contrast, an absorption image is suited to enlarged observations of shapes in detail within samples.
The dark-field image obtained by scanning over a wide field of view makes it possible to ascertain fine structure in the
sample as a whole, and to estimate its position.
The absorption image obtained by enlarged scanning makes it possible to observe the shape of fine structure in detail.
When observing fine structure, there is no need to scan repeatedly over a narrow field of view.

Example: Cross-Sectional Images of a CFRP Cloth Material with Cracks 0° direction 45° direction 90° direction -45° direction

Fiber Orientation Analysis from Four Data Samples

Weld line

10 mm 10 mm 5 mm 5 mm

Cross-Sectional Image Cross-Sectional Image Cross-Sectional Image Cross-Sectional Image
(Dark) (1) (Absorption) (1) (Dark) (2) (Absorption) (2)

Scanning method: Wide field of view scan Scanning method: Enlarged scan
7mm 2mm

Vector Direction Color Map (CT) Results of an Absorption Orientation Analysis
(Image obtained with the inspeXio
SMX-225CT FPD HR Plus)
In comparison to conventional X-ray CT systems, the position of
the weld line can be specified across a wider field of view.

Biocoke

Biocoke is a solid biofuel formed from plants through photosynthesis. In this example, fine cracks produced during
formation can be visualized using dark-field images. Fine cracks invisible with conventional X-ray CT can be visualized
by detecting the scattering of X-rays at the borderline between the material and the crack (air).
Observations of Fiber Orientation

The flow of fiber bundles, derived
from multiple dark-field images, can
be aligned with the orientation angle Crack
and displayed in color (vector
direction color maps). The flow of Cross-Sectional Image (Absorption) Cross-Sectional Image (Dark) VR Image (Dark)
fiber bundles can be understood
intuitively by representing it in color.
The quantitative analysis of microscopic cracks using this system has become a standard evaluation to check whether
the combustion properties of biocoke are as close as possible to those of coal coke, thus laying the foundations for
achieving a carbon neutral society through conversion to renewable energy.
Cross-Sectional Image of Vector Direction Color Map (CT) (Samples and comments provided by: Professor Tamio Ida of the Bio-Coke Research Institute, Kindai University)
CFRP Cloth Material (Dark)
The affiliation of the providers of the samples and comments is as of July 27, 2022.

4 5