An online detection device and detection method for surface roughness of a high-temperature coated superconducting substrate

Abstract

The invention discloses a surface roughness online detection device and method for a high-temperature coating superconductive baseband and belongs to the technical field of detection of high-temperature coating superconductive basebands. The surface roughness online detection device for the high-temperature coating superconductive baseband comprises a band winding and unwinding system, an atomic force microscope, a power system and an IPC (Industrial Personal Computer) system. A surface roughness online detection method comprises that a baseband is placed on a sample stage of the atomic force microscope through the band winding and unwinding system, a probe tip acts on the surface of the baseband to be detected, laser beams emitted by a laser is focused on a back surface of a micro-cantilever through a reflector and is reflected on a light spot position detector, during sample detection, due to interaction forces between atoms on a baseband surface and atoms at the tip of the probe of the micro-cantilever, the micro-cantilever bends and fluctuates along with the surface topography of the baseband, reflected beams also offsets along with the surface topography of the baseband, then a control system indicates a position of a light spot through a light-difference-converted voltage signal, and a baseband RMS (root-mean-square) roughness Rq and an arithmetic mean roughness Ra are computed through a computer. The simple-structure atomic force online checking device and detection method can meet requirements of surface inspection of samples.

Description

technical field [0001] The invention belongs to the technical field of high-temperature coated superconducting baseband detection, and relates to an on-line detection device and a detection method for the surface roughness of the baseband. Background technique [0002] YBCO-coated high-temperature superconducting tapes are usually grown on biaxially textured metal substrates with isolation layers. The main role of the baseband is to epitaxially grow the transition layer and the superconducting layer, and at the same time be able to withstand certain stress and strain. In order to meet the requirements of high-performance superconducting strips, the following performance indicators must be met: high cubic texture, through epitaxial growth of YBCO film, to form small-angle grain boundaries between YBCO grains, and overcome the weak connection caused by large-angle grain boundaries Behavior; excellent surface roughness and good mechanical strength to ensure sufficient support ...

AI Technical Summary

Problems solved by technology

[0003] The detection of the surface roughness of the metal base tape is the key to the preparation of YBCO coated superconducting tape, and there is no report on the detection device and detection method for the surface roughness of the long tape.

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