Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of Reactive Air Brazing Parameters on the Interfacial Microstructure and Shear Strength of GDC-LSM/Crofer 22 APU Joints

  • Raju, Kati (Energy Efficiency and Materials Research Division, Korea Institute of Energy Research) ;
  • Kim, Seyoung (Energy Efficiency and Materials Research Division, Korea Institute of Energy Research) ;
  • Seong, Young-Hoon (Energy Efficiency and Materials Research Division, Korea Institute of Energy Research) ;
  • Yoon, Dang-Hyok (School of Materials Science and Engineering, Yeungnam University)
  • Received : 2019.06.21
  • Accepted : 2019.07.12
  • Published : 2019.07.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the joining characteristics of GDC-LSM ceramics with Crofer 22 APU metal alloys was investigated at different brazing temperatures and holding times by reactive air brazing. Brazing was performed using Ag-10 wt% CuO filler, at three different temperatures (1000, 1050, and 1100℃ for 30 minutes) as well as for three different holding times (10, 30, and 60 minutes at 1050℃). The interfacial microstructures were examined by scanning electron microscopy and the joining strengths were assessed by measuring shear strengths at room temperature. The results show that with increasing brazing temperature and holding time, joint microstructure changed obviously and shear strength was decreased. Shear strength varied from a maximum of 100±6 MPa to a minimum of 18±5 MPa, depending on the brazing conditions. These changes were attributed to an increase in the thickness of the oxide layer at the filler/metal alloy interface.

Keywords

References

  1. J. S. Hardy, J. Y. Kim, and K. S. Weil, "Joining Mixed Conducting Oxides Using an Air-Fired Electrically Conductive Braze," J. Electrochem. Soc., 151 [8] J43-9 (2004). https://doi.org/10.1149/1.1764782
  2. J. Y. Kim, J. S. Hardy, and K. S. Weil, "Effects of CuO Content on the Wetting Behavior and Mechanical Properties of a Ag-CuO Braze for Ceramic Joining," J. Am. Ceram. Soc., 88 [9] 2521-27 (2005). https://doi.org/10.1111/j.1551-2916.2005.00492.x
  3. K. S. Weil, C. A. Coyle, J. T. Darsell, G. G. Xia, and J. S. Hardy, "Effects of Thermal Cycling and Thermal Aging on the Hermeticity and Strength of Silver-Copper Oxide Air-Brazed Seals," J. Power Sources, 152 97-104 (2005). https://doi.org/10.1016/j.jpowsour.2005.01.053
  4. J. Y. Kim, J. S. Hardy, and K. S. Weil, "Dual-Atmosphere Tolerance of Ag-CuO-Based Air Braze," Int. J. Hydrogen Energy, 32 [16] 3655-63 (2007). https://doi.org/10.1016/j.ijhydene.2006.08.054
  5. J. Y. Kim and K. S. Weil, "Effects of Brazing Time and Temperature on the Microstructure and Mechanical Properties of Aluminum Air Brazed Joints," J. Am. Ceram. Soc., 90 [12] 3830-37 (2007).
  6. H. Chen, L. Li, R. Kemps, B. Michielsen, M. Jacobs, F. Snijkers, and V. Middelkoop, "Reactive Air Brazing for Sealing Mixed Ionic Electronic Conducting Hollow Fibre Membranes," Acta Mater., 88 74-82 (2015). https://doi.org/10.1016/j.actamat.2015.01.029
  7. K. Raju, Muksin, S. Kim, K. Song, J. H. Yu, and D. H. Yoon, "Joining of Metal-Ceramic Using Reactive Air Brazing for Oxygen Transport Membrane Applications," Mater. Des., 109 233-41 (2016). https://doi.org/10.1016/j.matdes.2016.07.068
  8. K. Raju, Muksin, and D. H. Yoon, "Reactive Air Brazing of GDC-LSCF Ceramics Using Ag-10 wt% CuO Paste for Oxygen Transport Membrane Applications," Ceram. Int., 42 [14] 16392-95 (2016). https://doi.org/10.1016/j.ceramint.2016.07.042
  9. M. F. R. Wahid, D. H. Yoon, K. Raju, S. Kim, K. Song, and J. H. Yu, "Interfacial Microstructure and Shear Strength of Reactive Air Brazed Oxygen Transport Membrane Ceramic-Metal Alloy Joints," Met. Mater. Int., 24 [1] 157-69 (2018). https://doi.org/10.1007/s12540-017-7160-4
  10. M. D. Kim, M. F. R. Wahid, K. Raju, S. Kim, J. H. Yu, C. D. Park, and D. H. Yoon, "Efficacy of Ag-CuO Filler Tape for the Reactive Air Brazing of Ceramic-Metal Joints," J. Korean Ceram. Soc., 55 [5] 492-7 (2018). https://doi.org/10.4191/kcers.2018.55.5.05
  11. A. Ibrahim and F. Hasan, "Influence of Processing Parameters on the Strength of Air Brazed Alumina Joints Using Aluminum Interlayer," J. Mater. Sci. Technol., 27 [7] 641-46 (2011). https://doi.org/10.1016/S1005-0302(11)60119-9
  12. M. Khakian, S. Nategh, and S. Mirdamadi, "Effect of Bonding Time on the Microstructure and Isothermal Solidification Completion During Transient Liquid Phase Bonding of Dissimilar Nickel-based Superalloys IN738LC and Nimonic 75," J. Alloys Compd., 653 386-94 (2015). https://doi.org/10.1016/j.jallcom.2015.09.044
  13. I. Goto, S. Aso, and K. I. Oguchi, "Effect of Joining Conditions on the Shear Strength of Barium Titanate Joint Brazed with Molten Aluminum," Mater. Trans., 58 [8] 1175-80 (2017). https://doi.org/10.2320/matertrans.L-M2017820
  14. Q. Wang, Y. Fu, Q. Lang, J. Yan, and S. Chen, "Microstructure and Mechanical Properties of Magnesium Alloys Joints with Ag-Cu Interlayer by Ultrasonicinduced Transient Liquid Phase Bonding in Air For Structure Lightweight Design," Mater. Lett., 237 37-40 (2019). https://doi.org/10.1016/j.matlet.2018.11.058
  15. A. Kaletsch, A. Bezold, E. M. Pfaff, and C. Brockmann, "Effects of Copper Oxide Content in AgCuO Braze Alloy on Microstructure and Mechanical Properties of Reactive Air-Brazed $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ (BSCF)," J. Ceram. Sci. Technol., 3 [2] 95-104 (2012).
  16. K. Bobzin, M. Ote, S. Wiesner, A. Kaletsch, and C. Broeckmann, Characterization of Reactive Air Brazed Ceramic/Metal Joints with Unadapted Thermal Expansion Behavior," Adv. Eng. Mater., 16 [12] 1490-97 (2014). https://doi.org/10.1002/adem.201400311
  17. E. Skiera, J. Brandenberg, C. Li, T. Koppitz, T. Beck, L. Singheiser, and B. Kuhn, "Mechanical Properties of Reactive Air Brazed (RAB) Metal/Ceramic Joints. Part 2: Tailored Microstructure for Thermal Cycling Resistance," Adv. Eng. Mater., 16 [12] 1423-29 (2014). https://doi.org/10.1002/adem.201400073
  18. E. Prevost, A. J. D. Marco, B. M. Michael, V. V. Joshi, A. Meier, J. W. Hoffman, and W. J. Walker, "Microstructural Development and Mechanical Properties for Reactive Air Brazing of ZTA to Ni Alloys Using Ag-CuO Braze Alloys," Adv. Eng. Mater., 16 [12] 1448-55 (2014) . https://doi.org/10.1002/adem.201400140
  19. K. M. Erskine, A. M. Meier, V. V. Joshi, and S. M. Pilgrim, "The Effect of Braze Interlayer Thickness on the Mechanical Strength of Alumina Brazed with Ag-CuO Braze Alloys," Adv. Eng. Mater., 16 [12] 1442-47 (2014) . https://doi.org/10.1002/adem.201400128
  20. J. Cao, X. Si, W. Li, X. Song, and J. Feng, "Reactive Air Brazing of YSZ-Electrolyte and $Al_2O_3$-Substrate for Gas Sensor Sealing: Interfacial Microstructure and Mechanical Properties," Int. J. Hydrogen Energy, 42 [15] 10683-94 (2017) https://doi.org/10.1016/j.ijhydene.2017.01.105
  21. J. H. Joo, K. S. Yun, J. H. Kim, Y. Lee, J. Jung, C. Y. Yoo, and J. H. Yu, "Substantial Oxygen Flux in Dual-Phase Membrane of Ceria and Pure Electronic Conductor by Tailoring the Surface," ACS Appl. Mater. Interfaces, 7 [27] 14699-707 (2015). https://doi.org/10.1021/acsami.5b03392
  22. B. T. Na, J. H. Park, J. H. Park, J. H. Yu, and J. H. Joo, "Elucidation of the Oxygen Surface Kinetics in a Coated Dual-Phase Membrane for Enhancing Oxygen Permeation Flux," ACS Appl. Mater. Interfaces, 9 [23] 19917-24 (2017). https://doi.org/10.1021/acsami.7b04685
  23. B. Kuhn, F. J. Wetzel, J. Malzbender, R. W. Steinbrech, and L. Singheiser, "Mechanical Performance of Reactive- Air-Brazed (RAB) Ceramic/Metal Joints for Solid Oxide Fuel Cells at Ambient Temperature," J. Power Sources, 193 [1] 199-202 (2009). https://doi.org/10.1016/j.jpowsour.2008.10.117
  24. S. Kim, J. H. Joo, S. D. Kim, and S. K. Woo, "Evaluation of $CaO-Al_2O_3$ Adhesive Bonding Properties for ${\beta}$″-$Al_2O_3$ Solid Electrolyte Sealing for Alkali Metal Thermal Electric Converter," Ceram. Int., 39 [8] 9223-27 (2013). https://doi.org/10.1016/j.ceramint.2013.05.027
  25. N. J. Magdefrau, L. Chen, E. Y. Sun, AND M. Aindow, "Effects of Alloy Heat Treatment on Oxidation Kinetics and Scale Morphology for Crofer 22 APU," J. Power Sources, 241 756-67 (2013). https://doi.org/10.1016/j.jpowsour.2013.03.181
  26. K. Przybylski, T. Brylewski, E. Durda, R. Gawel, and A. Kruk, "Oxidation Properties of the Crofer 22 APU steel Coated With $La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_3$ for IT-SOFC Interconnect Applications," J. Therm. Anal. Calorim., 116 [2] 825-34 (2014). https://doi.org/10.1007/s10973-013-3594-1

Cited by

  1. Interfacial and Cross-sectional Studies of Thermally Cycled Alumina-Monel Brazed Joint vol.79, pp.3, 2019, https://doi.org/10.1080/0371750x.2020.1787865