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Nb-carbonitride Analysis Techniques in Nb-steels
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1994, v.7 no.4, pp.493-504
Lee,
J., Jung,
S., &
Yoo,
K.
(1994). Nb-carbonitride Analysis Techniques in Nb-steels. Analytical Science and Technology, 7(4), 493-504.
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Abstract
The morphology and structure of precipitates of formed in Nb steels were investigated using SEM, TEM and XRD. The quantitative analysis of the precipitates was performed by ICP-AES. The potentiostatic etching method was employed as an extraction method using 10% AA-methanol and 15% Na-citrate electrolytes. The two selected potentials relative to SCE(Standard Calomel Electrode), -100mV in 10% AA-methanol solution and -250mV in 15% Na-citrate solution were found to be effective for the extraction. XRD analysis showed that composition of Nb carbonitride in Nb-steel(0.01% C-0.7% Nb-0.004N) was <TEX>$NbC_{0.65}N_{0.2}$</TEX>.
- keywords
- Nb-steel, structure of precipitates, extraction method
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