【摘 要】
：
The Gd60Co30Fe10 alloy ribbons with different solidification cooling rates were prepared by modifying the melt-spinning speed of 6.0,12.5,25.0 and 50.0 m·s-1.With cooling rate decreasing,the (Fe,Co)5Gd and hcp-Gd nanocrystalline was in situ precipitated a
【机 构】
：
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (Anhui Univer
论文部分内容阅读
The Gd60Co30Fe10 alloy ribbons with different solidification cooling rates were prepared by modifying the melt-spinning speed of 6.0,12.5,25.0 and 50.0 m·s-1.With cooling rate decreasing,the (Fe,Co)5Gd and hcp-Gd nanocrystalline was in situ precipitated among the amor-phous matrix,which resulted in the composition change of the amorphous phase.Because of the only slight amount of crystalline phase in Gd60Co30Fe10 alloys,the magnetic and magnetocaloric properties mainly depend on the amor-phous phase,and all the magnetic entropy change versus temperature (|ASM|-T) curves are table-like,indicating the suitability for Ericsson cycle.The magnetic transition temperature of the Gd60Co30Fe10 alloy at a melt-spinning speed of 6.0 m·s-1 shifted obviously to the lower value with the applied magnetic fields increasing.The peak value of magnetic entropy change (|ΔSMPk|) is 2.19 J·kg-1·K-1 at 217 K under the magnetic field change of 0-2 T,and the table-like region is 200-230 K.It was proved that the moderate reduction of the cooling rate will not deteriorate the magnetocaloric performance of the Gd60Co30Fe10 rib-bons seriously.
其他文献
Various solid state phase transformations exist in metastable β-type Ti alloys,which can be employed to optimize the mechanical properties.In this paper,syn-chrotron X-ray diffraction (SXRD) experiments were car-ried out to study the phase transformations
In this paper,a silvered gradient nanostructured(GNS) layer was successfully fabricated on Ti6Al4V surface by means of surface ultrasonic rolling treatment (SURT)combined with silvering process.Surface characteristics,mechanical properties,corrosion resis
Ti-Cu alloy has potential to be used in plastic surgery and dental implants due to its strong antibacterial properties,high strength and good corrosion resistance.In this paper,Ti-5Cu was anodic-oxidized to enhance the surface compatibility.The influence
To analyze the magnetic properties of Nd2Fe14B compound under high pressure,an improved two-sublattice molecular field model coupled with equivalent stress field was applied to study the effect of pressure on magnetiza-tion,magnetostriction coefficient,su
In this study,yttrium as desulfurizer on the purification of Ni-20Co-20Cr-10Al-Y alloy during vac-uum induction melting (VIM) process using Y2O3 cru-cibles was investigated experimentally.It is found that Y plays an important role on the desulfurizing of
Pathogenic bacteria have been threatening the daily life of human beings.More effective methods without causing drug-resistance of bacteria need to be developed to fight against these pathogens.Herein,flower-like CuS/-graphene oxide (GO) hybrids have been
It is approved that grain boundary diffusion is an effective method to increase the coercivity of hot-deformed NdFeB magnet.In this paper,a new rare earth-free grain boundary diffusion source of hot-deformed magnet was studied.AlCuZn powders blended with
Although titanium and its alloys are extensively used in orthopedics and dentistry fields,implant failures still happen because of implant-associated infections.Herein,Au@Ag@Pt core-shell nanorods with noble metal combination were fabricated and assembled
Development of photocatalytic materials able to profit from the whole spectrum of sun for efficient organic pollution removal and bacterial elimination is a fascinating strategy in environmental engineering.In current work,GO-TiO2/(Ca,Y)F2∶Tm,Yb,a full-sp
In this work,a process of cold rolling with 70％thickness reduction and different annealing temperatures was selected to regulate the microstructure of Ti-3wt％Cu alloy.Microstructural evolution,mechanical properties and antibacterial properties of the Ti-3