On the Advantages of Local Measurement of Coercive Force of Ferromagnetic Objects Based on Internal Field
Source abstract
Abstract
It has been shown that locally measuring coercive force $${{H}_{{\text{c}}}}$$ based on the magnitude of demagnetizing current has a fundamental limitation on the measurement range. We have demonstrated the expediency of measuring coercive force in ferromagnetic objects locally, based on the magnitude of the tangential component of the magnetic field in the interpole space on the surface of the test object, that is, based on the internal field. This allows one to expand the range of measured values $${{H}_{{\text{c}}}}$$ by several times. Also, the influence of the gap between the transducer and the object, as well as the shape and size of test objects on the measurement results is significantly reduced. This makes it possible to measure the absolute values of $${{H}_{{\text{c}}}}$$ of homogeneous ferromagnetic objects, as well as the coercive force of objects with nonferromagnetic coatings of considerable thickness.
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Research context
OpenAlex topics: Magnetic Field Sensors Techniques · Non-Destructive Testing Techniques · Magnetic Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (21)
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