Analytical Science and Technology (분석과학)
- Volume 7 Issue 4
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- Pages.493-504
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- 1994
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- 1225-0163(pISSN)
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- 2288-8985(eISSN)
Nb-carbonitride Analysis Techniques in Nb-steels
강 중 Nb계 탄질화 석출물 정량분석 기술
- Lee, J.J. (Analytical lab., Research Institute of Industrial Science & Technology) ;
- Jung, S.W. (Analytical lab., Research Institute of Industrial Science & Technology) ;
- Yoo, K.S. (Department of Chemistry, Ulsan University)
- Received : 1994.09.29
- Published : 1994.12.25
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
Nb steel에 있어서의 석출물의 형상과 구조를 SEM, TEM과 XRD를 이용하여 연구하였고 추출물들의 정량분석을 ICP-AES를 사용하여 실시하였다. 석출물 추출 방법으로는 정전위 전해추출법을 사용하였고 전해액으로는 10% AA-methanol 용액과 15% Na-citrate 용액을 사용하여 비교하였다. 전해추출 전위는 10% AA-methanol 용액에서는 -100mV, 15% Na-citrate 용액에서는 -250mV로 선택하였고 이 전위에서 Nb 석출물을 분리하는 데 적당하였다. 추출 잔사 중의