Application Progress of Advanced Characterization Techniques in Microstructural Studies on Zirconium Alloys
Zirconium alloy has good nuclear,mechanical,and machining properties.As an important structural material,it has a wide application prospect in the nuclear industry,aerospace,and medical equipment.Understanding the microstructure of zirconium alloy is crucial to understanding their performance and properties.The microstructural changes(such as second phase,oxide film,hydride,etc.)under processing and service conditions and the effects on properties have attracted extensive attention in the fields of materials science and nuclear engineering.Advanced characterization methods play a key role in the study of the microstructure of zirconium alloys.In recent years,advanced characterization methods including electron microscopy,electron probe microanalysis,in-situ characterization,and atom probe have developed rapidly,and have been applied in the study of zirconium alloy microstructures,providing people with a deeper understanding of the structure and properties of zirconium alloys.Electron microscopic analysis technology can characterize the microstructural characteristics of the second phase,hydrides,and oxide films of zirconium alloy cladding,providing support for the optimization and improvement of the performance of zirconium alloy cladding materials.Electron probe microanalysis(EPMA)is a high-resolution microscopic technique that can analyze the microstructure and surface characteristics of zirconium alloys.In-situ detection techniques include in-situ irradiation technology with transmission electron microscopy,in-situ electrochemical impedance spectroscopy technology,in-situ tensile experiments,and in-situ Raman spectroscopy.Among them,in-situ irradiation technology with transmission electron microscopy can be used to study the behavior of zirconium alloys in irradiation conditions and the microstructural changes caused by irradiation.In-situ electrochemical impedance spectroscopy technology can be used to study the changes in impedance modulus and oxide film thickness of zirconium alloys during corrosion.In-situ tensile experiments can observe the deformation behavior of zirconium alloys in real time,and in-situ Raman spectroscopy can be used to detect changes in the composition and structure of zirconium alloys.Atom probe tomography can analyze the element segregation phenomenon,oxidation process,hydrogen distribution,etc.in zirconium alloys,as well as characterize the atomic distribution at the nanoscale.In this paper,the application progress and existing problem of characterization methods in the study of zirconium alloy microstructure are reviewed.The future research direction of zirconium alloy microstructure is prospected based on engineering practice,providing a reference for an in-depth understanding of the microstructure of zirconium alloy.
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NSTL
万方数据
维普
