Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Non-destructive Analysis of Nano-sized Crack Morphology of Electro-deposit by Using Small Angle Neutron Scattering

소각중성자 산란법을 이용한 도금층의 극미세 균열 형상의 비파괴적 분석

  • 최용 (단국대학교 신소재공학과) ;
  • 신은주 (한국원자력연구원 하나로팀) ;
  • 한영수 (한국원자력연구원 하나로팀) ;
  • 성백석 (한국원자력연구원 하나로팀)
  • Received : 2016.03.18
  • Accepted : 2016.04.29
  • Published : 2016.04.30
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Abstract

A method to quantitatively analyze the defects formed by the hydrogen evolution during electroplating was suggested based on the theoretical approach of the small angle neutron scattering technique. In case of trivalent chrome layers, an isolated defect size due to the hydrogen evolution was about 40 nm. Direct and pulse plating conditions gave the average defect size of about 4.9 and $4.5{\mu}m$ with rod or calabash shape, respectively. Current density change of the pulse plating from $1.5A/dm^2$ to $2.0A/dm^2$ enlarged the average defect size from 3.3 to $7.8{\mu}m$. The defect morphology like rod or calabash was originated by inter-connecting the isolated defects. Small angle neutron scattering was useful to quantitatively evaluate defect morphology of the deposit.

Keywords

References

  1. J. Y. Lee, N. V. Phuong, D. K. Kang, M. Kim, S. C. Kwon, Investigation of the Effect of Solution Acidity and Organic Additives on the Electrodeposition of Trivalent Chromium Ions, J. of Kor. Inst. Surf. Eng., 43(6) (2010) 297-303. https://doi.org/10.5695/JKISE.2010.43.6.297
  2. Y. Choi, Development of Plating Technology for Hard Chrome with Improved Wear and Corrosion Resistance, Kor. J. Met. Mater., 34(6) (1996) 773-779.
  3. Y. Choi, Corrosion and Wear Properties of Electrodeposited Amorphous Chrome, J. of Mat. Sci., 32 (1997) 1581-1586. https://doi.org/10.1023/A:1018586808327
  4. Y. Choi, N. I. Baik, S. I. Hong, Microstructural Observation and Wear Properties of Thin Chrome Layers Prepared by Pulse Plating, Thin Solid Films, 397 (2001) 24-29. https://doi.org/10.1016/S0040-6090(01)01352-9
  5. Y. Choi, M. Kim and S. C. Kwon, Characterization of Chrome Layer Formed by Pulse Plating, Surf. Coat. Tech., 169 (2003) 81-84.
  6. Y. Choi, M. Y. Choi, Y. S. Hahn, M. Kim, S. C. Kwon, Evaluation of Nano-size Defects of Chromium Layers by Small Angle Neutron Scattering, Mater. Sci. Forum, 475 (2005) 3815-3818.
  7. Y. Choi, B. S. Seong, Man Kim, Sik-Chol Kwon, Evaluation of Defect Structure in Pulsed Plated Trivalent Chromium Layers by Small Angle Neutron Scattering, J. Appl. Surf. Finish., 1(4) (2006) 304-308.
  8. Y. Choi, Electro-deposition Behaviors of Trivalent Chromium during Pulse Plating, Met. Mater. Inter., 16(5) (2010) 755-760. https://doi.org/10.1007/s12540-010-1009-4
  9. Y. Choi, In-situ Analysis of Inner Crack Instability of Electro-deposited Trivalent Chromium Layers Using Small Angle Neutron Scattering, Met. Mater. Inter., 18(4) (2012) 667-671. https://doi.org/10.1007/s12540-012-4015-x
  10. M. Kim, J.-Y. Lee, S.-C. Kwon, D. Kim, I.-G. Kim, Y. Choi, Application of Small Angle Neutron Scattering to Analyze Precision Nickel Mesh for Electro-magnetic Interference Shielding Formed by Continuous Electroforming Technique, Physica B: Cond. Matter., 385(2) (2006) 914-916. https://doi.org/10.1016/j.physb.2006.05.248
  11. E. J. Shin, B. S. Seong, Y. Choi, J. K. Lee, Non-Destructive Evaluation of Nano-Sized Structure of Thin Film Devices by Using Small Angle Neutron Scattering, J. Nanosci. Nanotech., 11(1) (2011) 876-879. https://doi.org/10.1166/jnn.2011.3252
  12. A. Boothroyd. "Introductory Theory : 12th Oxford School on Neutron Scattering", Oxford University, Lecture-note, Oxford UK (2011) 13.
  13. S. M. King, "Small Angle Neutron Scattering", ISIS, Lecture-note, Oxford UK (1995) 3.
  14. R. Pynn, "Neutron Scattering-A Non-destructive Microscope for Seeing Inside Matter", LANL, Lecture-note, Los Alamos USA (2006) 15.
  15. A. J. Jackson, "Introduction to Small Angle Neutron Scattering and Neutron Reflectometry", NIST Center for Neutron Research, Lecture-note, Gaithersburg USA (2008) 5.