The Oxidation of Kovar(Fe-29Ni-17Co) in Humidified nitrogen

가습된 질소 분위기에서의 Kovar(Fe-29Ni-17Co)산화

  • 김병수 (한양대학교 무기재료공학과) ;
  • 김민호 (한국과학기술연구원 세라믹공정연구센터) ;
  • 김상우 (한국과학기술연구원 세라믹공정연구센터) ;
  • 최덕균 (한양대학교 무기재료공학과) ;
  • 손용배 (한국과학기술연구원 세라믹공정연구센터)
  • Published : 1999.11.01


In order to form a uniform oxidation layer and spinel crystalline phase that was supposed to help strong bonding in Kovar(Fe-29Ni-17Co)to-glass sealing the humidified nitrogen (2.3%H2O/N2) was used as an oxidation atmosphere. Kovar oxidation was diffusion-contolled and the activation energy was 2.51 kcal/mol at 600-900$^{\circ}C$ After oxidation at 600$^{\circ}C$ the oxidation layer was under 1$\mu\textrm{m}$ thickness and crystalline phase was spinel which was found to be suitable for the Kovar-to-glass sealing.


  1. ASTM Designation : F-1466-93 Standard Specification for Iron-Nickel-Cobalt alloys for Metal-to-Ceramic Sealing Applications
  2. ASM International(USA) v.41-47 One-Step Matched Seal : New Process for Manufacturing Hybrid Micro Circuit Package N. Bandyopadhyay;S. Tamhankar;M. Kirschner
  3. Ceramic Substiates and Packages for Electronic Applications v.26 Process Condition Hermetic Sealing of Kovar to Boro-silicate Glass N. Bandyopadhyay;S. Tamhankar;M. Kirschner;M.F. Yan(ed.);K.Miwa(ed.);M O'Bryan Jr.(ed.);W.S. Young(ed.)
  4. ASM International, Engineered Materials Handbook. Vol. 4 : Ceramics and Glasses (USA) v.4 Glass/Metal and Glass-ceramic/Metal Seals A.P. Tomsia;J.A. Pask;R.E. Loehman
  5. Materials Res. and Stds. v.5 no.459-466 Oxide Formation and Adherence on an iron-Cobalt-Nickel Glass Sealing Alloy R.P. Abendroth
  6. J Electrochem. Soc. v.123 no.6 Oxidation of Fe-29Ni-17Co Alloy R.A. Piscitelli;F.N. Bradly;S.K. Rhee
  7. Met. Prog. v.7 no.29-34 Using Nitrogen based Atmosphere for Glass-to-Metal Sealing J.J. Schmidt;J.L. Carter
  8. Introduction to the Thermodynamics of Materials Third Edition D.R. Gaskell
  9. 요업학회지 v.35 no.1 Ag-Cu-Ti 브레이징 합금의 산화거동 우지호;이동복;장희석;박상환
  10. J. Electrochem. Soc. v.121 no.4 Diffusional Growth of Cobaltous-Ferrous Oxide Scale on Cobalt-Iron Alloys P. Mayer;W. Cohen
  11. J. Electrochem. Soc. v.121 no.3 Diffusion Model for Oxidation of Ni-Fe Alloys at 1000℃ A.D. Dalvi;W.W. Smeltzer