Diffusion Database

Diffusion Database (Kakusan)

The Diffusion Database aims to cover all the basic diffusion data of metallic and inorganic materials mainly from the literature sources. The database consists of "diffusion data" and "reference data". Currently the system primarily contains information of pure metals, alloys, semiconductors, ceramics and intermetallics.

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Number of open data

Nov. 17, 2023
Diffusion data 29,127
References 5,331

Data

1. Diffusion data

Symbols

(a) D=D0*exp(-Q/RT)
D: diffusion coefficient (m2/s), D0: diffusion constant (frequency factor) (m2/s)
Q: activation energy (kJ/mol), (1eV=96.5 kJ/mol)
R: gas constant=8.31446 J/(mol*K), T: absolute temperature (K)

(b) P=s*δ*D(gb) (m3/s)
P: grain boundary diffusivity (m3/s), s: segregation factor
δ:grain boundary width (m), D(gb): grain boundary diffusion coefficient (m2/s)

(c) others
D(itd): interdiffusion coefficient, D(itr): intrinsic diffusion coefficient

Abbreviations

AES: Auger electron spectroscopy, EPMA: Electron probe micro-analyzer
FIM: Field ion microscopy, RBS: Rutherford backscattering spectrometry
SEM: Scanning electron microscopy, SIMS: Secondary-ion mass spectrometry


Listed data in the table

"material", "chemical composition (wt.%, at.%, stoichiometrical expression)", "diffusant", "D0", "Q", "Tmin", "Tmax", "measurement", "reference code", etc.

Graphical expression of D (Arrhenius plot)
ArrheniusPlot.gif
X Axis 1/T (K-1) X2 Axis T (K)
Y Axis D (m2/s) Y2 Axis L=2√D (m)

Diffusion coefficient D=D0exp(-Q/RT)
Diffusion length L(t)=2√Dt, L=2√D at t=1s

2. Reference data

Listed data in the table

"title", "authors", "journal name", "affiliation", "the year of issue", "vol.", "page"

Disclaimer

  • National Institute for Materials Science (NIMS) holds the copyright of this database system.
  • No reproduction, republication or distribution to third parties of any content is permitted without written permission of NIMS.
  • NIMS takes no responsibility for any damage incurred by the user as a result of using this database system.

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Scheduled system maintenance

Service may be unavailable every Wednesday from 18:00 to 20:00 (JST) due to scheduled system maintenance.

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