A Device for Microscopic Imaging of Subsurface Nanoscale Failure Behavior

Abstract

The invention discloses a microimaging for subsurface nanoscale failure behaviors. The microimaging device used for achieving high-resolution microimaging of the subsurface pyroelectric behaviors of ato-be-measured energy storage dielectric material and device comprises a subsurface pyroelectric signal in-situ excitation module, a pyroelectric signal in-situ detection module and a pyroelectric signal microimaging module, wherein subsurface pyroelectric signal in-situ excitation module is used for exciting the subsurface pyroelectric current signals of the to-be-measured energy storage dielectric material and device in an in-situ manner; the pyroelectric signal in-situ detection module is used for performing in-situ real-time detection on the subsurface pyroelectric current signals of theto-be-measured energy storage dielectric material and device; the pyroelectric signal microimaging module is used for performing high-resolution microimaging on the subsurface pyroelectric current signals of the to-be-measured energy storage dielectric material and device according to the detection signals of the pyroelectric signal in-situ detection module and displaying the images. The atomic-force-microscope-based high-resolution microimaging device for the subsurface nanoscale failure behaviors is built by combining an atomic force microscope imaging function, a Joule heating effect, a heat wave effect and a pyroelectric effect.

Description

technical field [0001] The application belongs to the field of signal detection instruments, in particular to an atomic force microscope-based device for microscopic imaging of subsurface nanoscale failure behaviors of materials and devices. Background technique [0002] Ceramic dielectric capacitors have important applications in the field of new generation power electronic systems due to their high energy storage density, high withstand voltage strength, and good capacitance temperature and voltage stability. Dielectric capacitor is a kind of forced energy storage capacitor. Under the action of strong field, the dielectric properties of the dielectric material, the energy storage characteristics of the energy storage capacitor and the capacitor module will irreversibly degrade over time until breakdown and failure , which has an important impact on the safe operation of the entire electronic energy storage system. Therefore, it is of great significance to explore and clar...

AI Technical Summary

Problems solved by technology

So far, there is no high-resolution microscopic imaging technique capable of realizing the subsurface failure behavior of ceramic dielectric capacitors, which greatly limits the in-depth understanding of its strong field-induced structural variation and induced failure behavior

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