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Non-destructive radiochemical method for determining carbon concentrations in thin sheet 3% Si-Fe alloy
1Westinghouse Research Laboratories, Pittsburgh, Pennsylvania 15235, U.S.A.
Talanta
|November 1, 1976
Summary
A new non-destructive radiochemical method accurately determines carbon concentrations in thin 3% Si-Fe sheets. This technique is highly sensitive for low carbon levels, offering an advantage over combustion methods.
Area of Science:
- Materials Science
- Analytical Chemistry
- Nuclear Chemistry
Background:
- Accurate carbon concentration measurement is crucial for optimizing 3% Si-Fe properties.
- Existing methods may lack sensitivity for trace carbon levels in thin sheets.
Purpose of the Study:
- To develop a non-destructive radiochemical method for determining carbon concentrations in thin 3% Si-Fe sheets.
- To validate the method's sensitivity and accuracy compared to conventional techniques.
Main Methods:
- A 3% Si-Fe ingot was doped with Carbon-14 ((14)C) during melting.
- The ingot was processed into 0.30-mm thick sheets with controlled decarburizing annealing.
- Beta-radiation from the sheet surface was measured and correlated with carbon content.
Main Results:
- The radiochemical method showed a linear correlation between beta-radiation and bulk carbon content (1.5-110 ppm).
- The method's sensitivity was independent of sheet thickness.
- It proved more sensitive than combustion techniques for carbon concentrations below 20 ppm.
Conclusions:
- The developed non-destructive radiochemical method is effective for quantifying carbon in thin 3% Si-Fe sheets.
- This technique offers superior sensitivity for trace carbon analysis compared to traditional methods.
