These new methods include special acoustic methods, infrared transmission, optical coherence tomography, high-frequency eddy current technique, active thermography, microwave technique, and laser speckle photometry. All methods mentioned above are examined and discussed in. Ceramic materials represent a special challenge for nondestructive component testing. They differ significantly in composition, material properties, defect types, defect sizes, the manufacturing process, and geometric properties from metals, which are more often tested with nondestructive methods. This technology gives our customers a new and profound insight into the size shape and geometric conformance of cores that they have. The criteria for choosing the inspection method for verifying the dimensional integrity of a ceramic core used in investment casting can be as varied as the cores themselves. Every core design is different in shape, size and complexity. There are so many variables in determining the inspection. While a multimeter provides the most accurate and reliable method for testing a ceramic fuse, situations arise where you might not have one readily available.
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