Abstract
Biot number characterization methods associated with pure diffusion, reaction diffusion, and mixed diffusion control were proposed to characterize the thickness of the sample. Impedance spectroscopy models of the bulk diffusion coefficient (D) and surface transfer coefficient (β) of vacuum carburizing/nitriding process were established for in-situ characterization of the kinetic process. The simulation and experimental results show that the impedance spectrum correlates to the Biot number, and clearly shows the reaction-diffusion mechanism,, and the values of the bulk diffusion coefficient and the surface transfer coefficient can be obtained accurately.
| Translated title of the contribution | Impedance spectrum model of in-situ characterization of parameters of dynamic equation of vacuum thermal diffusion |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 129-134 |
| Number of pages | 6 |
| Journal | Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment |
| Volume | 41 |
| Issue number | 12 |
| DOIs | |
| State | Published - 25 Dec 2020 |
| Externally published | Yes |
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