Study On Process And Properties Of Ultrasonic-Pulse Electrodeposition Ni-Fe-Re Alloy On Biomass Template

Biomass resources in nature have a wide variety and rich structure,In this paper,based on biomass template（Coscinodiscus）,four kinds of typical rare earth nanoparticles（La₂O₃,CeO₂,Nd₂O₃,Sm₂O₃）were selected and prepared biomass-based Ni-Fe-RE alloy particles were prepared by ultrasound-pulse electrodeposition method.The effects of rare earth type,pulse current and ultrasonic wave on rare earth content,surface morphology,microstructure,magnetostatic characteristic,electromagnetic properties and mechanical properties of alloy coatings were investigated.The main research content completed in this article is as follows including microorganisms（such as diatoms,bacteria,etc.）,animals（skin,excrement,etc.）,plants（straw,pollen,etc.）,which are often used in the fields of materialization,energy,fertilizer,energy,feed and so on.The application of electromagnetic wave protection composite materials are one of the most commonly used and effective methods to reduce or eliminate the electromagnetic wave harm hazards,and the preparations of electromagnetic wave protection particles with excellent integrated properties are keys to the study of composite materials.In this paper,the application category of biomass is further expanded,and the special structure of biomass is combined with advanced particle coating technology to open up a new way to manufacture electromagnetic wave protective particles,which has far-reaching theoretical significance and great application potential.First,the pulse electrodeposition process of Ni-Fe-RE alloy was studied,and the co-deposition of rare earth nanoparticles was realized.The influence law of pulse electrodeposition process of Ni-Fe-RE alloy was obtained: The content of rare earth in alloy layer reaches the peak when the pulse average current density is 4—6A/dm²,the pulse duty ratio is 0.2,and the pulse frequency is 700—1000Hz.When La₂O₃ nanoparticles are added,the Ni-Fe and RE content in the alloy layer is the highest.The microstructure of four pulse electrodeposited Ni-Fe-RE alloy layers is compared and studied.There are three diffraction planes,namely（111）,（200）and（220）crystal planes,among which（111）is the preferred oriented crystal plane and the crystal state is face-centered cubic lattice（fcc）.Secondly,the process of ultrasonic-pulse electrodeposition of Ni-Fe-Re alloy was investigated in details.After ultrasonic wave was applied in the electrodeposition process,the Ni-Fe content in the alloy layer was decreased,and the ultrasonic power and frequency showed a linear relationship with the rare earth content in the alloy layer.The quality of Ni-Fe alloy coating on the surface of Coscinodiscus can be improved by ultrasonic wave,and there are significantly fewer tiny particles on the surface.Ultrasonic wave can enhance the diffraction peak intensity of（200）and（220）crystal planes,but does not change the preferred orientation plane and crystal phase structure.Thirdly,the effects of rare earth nanoparticles and ultrasonic waves on the properties of biomass-based magnetic functional particles was studied.Four biomass based rare earth magnetic functional particles are soft magnetic materials,in which rare earth La₂O₃ has the greatest effect on the soft magnetic properties of samples,followed by CeO₂ and Nd₂O₃,and the Sm₂O₃ has the least effect.Both rare earth nanoparticles and ultrasonic waves are beneficial to the enhancement of electromagnetic properties.The quality of Ni-Fe alloy coating has a significant effect on the electromagnetic properties with a similar amount of Ni and Fe.The higher the volume of biomass-based magnetic functional particles,the worse the mechanical properties of the material.The mechanical properties of materials can be significantly improved by ultrasonic waves,but the addition of rare earth nanoparticles basically has no effect on the mechanical properties of the material.