THE ROLE OF LOCAL STRUCTURE IN TRACER DIFFUSION MECHANISMS OF AMORPHOUS FE-BASED ALLOYS
Abstract
This study explores the role of local structural characteristics in influencing tracer diffusion mechanisms within amorphous Fe-based alloys. Amorphous materials, characterized by their lack of long-range order, exhibit unique properties that differ significantly from their crystalline counterparts. The diffusion behavior of tracer atoms within these alloys is critical for understanding their thermal stability, mechanical properties, and overall performance in various applications. Utilizing advanced characterization techniques, including nuclear magnetic resonance (NMR), X-ray diffraction (XRD), and atomic pair distribution function (PDF) analysis, we investigate the local structural arrangements and their correlation with diffusion pathways.
Our findings reveal that variations in the local environment, such as atomic coordination and clustering, significantly affect the mobility of tracer atoms. The results indicate that regions of increased atomic density facilitate higher diffusion rates, while disordered environments impede tracer movement. Additionally, we assess the impact of alloying elements on the local structure and diffusion behavior, providing insights into how compositional changes can be leveraged to optimize the properties of Fe-based alloys for specific applications.
This research contributes to a deeper understanding of the interplay between local structural characteristics and diffusion mechanisms in amorphous Fe-based alloys, offering valuable guidance for the design and development of advanced materials with tailored properties for industrial applications. Ultimately, the insights gained from this study may pave the way for enhancing the performance of amorphous alloys in a range of engineering fields.
Keywords
Local structure, tracer diffusion, amorphous alloysHow to Cite
References
HorvathJ, OttJ, PfahlerK, UlfertW. Tracer diffusion in amorphous alloys.Mater. Sci.Eng.1988;97:409-413.
PavlovskyJ, UlfertW, FrankW. Self-diffusion of58Co in amorphous Co79Nb14B7duringisothermal crystallization. Mater. Chem. Phys. 1994;36:383-388.
FrankW, HornerA, ScharwaechterP, KronmiilerH. Diffusion mechanisms inamorphous alloys. Mater. Sci. Eng. 1988;97:415-418.
TyagiAK, MachtMP, NaundorfV. Diffusion coefficients of63Ni in Fe40Ni40B20metallicglass. Acta Metall. Mater. 1991;39:609-617.
UlfertW, HorvathJ, FrankW, KronmfillerH. Self-diffusion of59Fe tracer atoms inamorphousFe78Si9B13and Fe40Ni40B20. Cryst. Latt. Def. Amorph. Mater. 1989;18:519-531.
FlegeS, FecherU, HahnH. Diffusion in amorphous NiZrAl alloys. J. Non-Cryst.Solids. 2000;270:123-128.
CalmRW, EvettsJE,PattersonJ,SomekhRE,JacksonCK. Direct Measurement bySIMS of Self-Diffusion of Boron in Fe40Ni40B20Glass. J. Mater. Sci. 1980;15:702-710.
ChakravartyS,et al.Fe and N self-diffusion in amorphous FeN: A SIMS and neutronreflectivity study. Acta Materialia 2009;57:1263-1271.
Van den BeukelA,SietsmaJ. Flow defects and diffusion defects in metallic glasses.Mater. Sci. Eng. 1991;134(A):935-938.
SharmaSK,BanerjeeS, Kuldeep,JainAK. A comparative study of thin film diffusionmeasurements in metallic glasses by Rutherford backscattering spectrometry andAuger electron spectroscopy.Acta Metall. 1988;36:1683-1690.
RoosWD,PlessisJD,van WykGN. Diffusion of silicon in Fe-based amorphous andcrystalline alloys.Appl. Surf. Sci. 1990;40:303-307.
LimogeY. Role of energetic disorder on diffusion in amorphous alloys. J. Non-Cryst.Solids 1990;117-118:605-608.
RuitenbergG,de HeyP,SommerF,SietsmaJ. Pressure dependence of the freevolume in amorphous Pd40Ni40P20and its implications for the diffusion process. Mater.Sci. Eng.1997;226-228(A):397-400.
LimogeY. Activation volume for diffusion in a metallic glass. Acta Metall. Mater.1990;38:1733-1742.
AverbackRS. Defects and diffusion in amorphous alloys. MRS Bulletin. 1991;16:47-52.
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