Effect Of Irradiation On Microstructure And Properties Of CuCrZr Alloy

In this paper,the influence of irradiation on microstructure and properties of alloy is studied by using nuclear fusion as the background of future energy.According to the working environment,in order to improve the comprehensive performance of Cu Cr Zr alloy,a tungsten thin film was prepared on the surface of Cu Cr Zr alloy by magnetron sputtering.The effects of sputtering power,sputtering pressure and sputtering time on the crystal structure,deposition rate,residual stress,tungsten film and matrix adhesion were studied.The interaction between plasma and materials was studied by combining theory with experiment.The simulation part mainly studies the influence of the proton incident energy on the alloy stopping power,energy transfer,energy loss,range,vacancy distribution and the irradiation damage of the alloy.The experimental part mainly studies the effect of plasma incident energy and dose on microstructure and properties of materials,and analyzes the surface damage mechanism of Cu Cr Zr alloy.The main results are as follows:In order to obtain a tungsten film with good overall performance,the magnetron sputtering process was studied.It is found that the sputtering power has a great influence on the structure and residual stress of the thin film,and the sputtering pressure and sputtering time has a certain effect on the film structure.When the sputtering power was at 25.0-75.0W,with the increase of sputtering power,the structure of the tungsten film was transformed from a-w to a-w,and the optimal growth direction of the crystal surface was changed from(210)to(110).Sputtering process of thin film and substrate effect is significant,sputtering power,sputtering time is closely related to the tungsten film and the substrate,a maximum of binding force corresponding to the best sputtering power between 50.0-62.5 W.Through the tungsten film structure,thin film deposition rate,film and substrate,the comprehensive judgment,the background vacuum degree was 2.5 ×10-3 Pa,Ar gas in business,and sputtering power 25.0 W-0.50 Pa sputtering pressure,sputtering time30 min,sputtering process of basal heating,the heating temperature is 100 ?process,membrane preparation performance is good,as the radiation processing samples.The effect of simulated proton irradiation on Cu Cr Zr alloys has been found:when the proton energy is between 1 and 10 Me V,the ability of the alloy to prevent protons decreases as proton energy increases,and electron blockade plays a major role.The alloy damage is mainly based on electron-hole pairs,and the vacancies only occupy a small part.Due to the low density of point defects and vacancies inside the grains,the point defects and vacancies further evolved to form dislocation loops and the number of tetrahedrons in the stacking faults decreased,making the alloy exhibit better radiation resistance.The peak depth of protons in the alloy increases as the proton energy increases,and the approximate exponential relationship.When the incident energy is constant,the peak depth is similar to the range of protons in the alloy.A certain concentration of Cu Cr Zr alloy in proton concentration will cause the alloy to swell and erode.The material is required to have good resistance to swelling property when materials are selected.When the incident proton energy reaches the Me V level,the sputtering yield is zero,and no sputtering occurs in the alloy.The radiation damage of the alloy is not only related to the damage efficiency,but also related to the proton incident depth and the proton injection amount.When the incident proton energy is 1-10 Me V,the maximum number of dissociated atoms generated per unit distance in the direction of the proton range is about 6 times.Under the action of high density plasma,the energy and dose of the incident ion have some influence on the structure of Cu Cr Zr alloy,but it has no great influence on the tungsten films prepared by magnetron sputtering.The irradiation dose can significantly change the surface morphology of the material,and the surface is produced nano-villi,which is composed of an uniformly distributed cross-shaped nanowire.It is found that tungsten thin films can significantly improve the irradiation performance of the materials.