Advertisement

Journal of Materials Science

, Volume 53, Issue 9, pp 6864–6871 | Cite as

Wettability of SnAgCu–Cr alloys on graphite with different Cr contents

  • S. P. Hu
  • Y. Z. Lei
  • X. G. Song
  • J. R. Kang
  • Y. X. Zhao
  • J. Cao
  • D. Y. Tang
Metals
  • 222 Downloads

Abstract

The wettability of brazing alloy on graphite surface is a key factor affecting the successful brazing of graphite to metals. By introducing active Cr, the traditional Sn0.3Ag0.7Cu brazing alloy can wet the graphite effectively. The design of active Cr introduction into SnAgCu alloy caused a significant decrease in contact angle, and the contact angle was decreased from 120° to 20° with the increasing content of active Cr. The influence of active Cr content on the wettability of SnAgCu/graphite system was investigated by sessile drop way at elevating and isothermal process in this work. Cr3C2 reaction layer formed at the interface of liquid alloy and graphite substrate, which enhanced the spreading of liquid brazing alloy and then decreased the contact angle. The thickness of Cr–C reaction layer kept identical of 2.5 μm with the further increasing content of active Cr. Finally, the wetting mechanism of SnAgCu–Cr/graphite system was proposed.

Notes

Acknowledgements

This project is supported by the National Natural Science Foundation of China (Grant Nos. 51775138 and U1537206) and International Science and Technology Cooperation Program of China (No. 2015DFA50470).

References

  1. 1.
    Ray AK, Kar A, Kori SA, Pathak LC, Sonnad AN (2013) Graphite-to-304SS braze joining by active metal-brazing technique: improvement of mechanical properties. J Mater Eng Perform 22:258–266CrossRefGoogle Scholar
  2. 2.
    He YM, Yang JG, Shen HY, Wang LM, Gao ZL (2016) Brazing graphite to hastelloy N superalloy using pure-Au filler metal: bonding mechanism and joint properties. Mater Des 104:1–9CrossRefGoogle Scholar
  3. 3.
    Fu W, Hu SP, Song XG et al (2017) Wettability and bonding of graphite by Sn0.3Ag0.7Cu–Ti alloys. Carbon 121:536–543CrossRefGoogle Scholar
  4. 4.
    Zhang J, Wang T, Liu C, He Y (2013) Effect of brazing temperature on microstructure and mechanical properties of graphite/copper joints. Mater Sci Eng A 594:26–31CrossRefGoogle Scholar
  5. 5.
    Mao Y, Wang S, Peng L et al (2016) Brazing of graphite to Cu with Cu50TiH2 + C composite filler. J Mater Sci 51:1671–1679.  https://doi.org/10.1007/s10853-015-9415-0 CrossRefGoogle Scholar
  6. 6.
    Zhong Z, Zhou Z, Ge C (2009) Brazing of doped graphite to Cu using stress relief interlayers. J Mater Process Technol 209:2662–2670CrossRefGoogle Scholar
  7. 7.
    Mao Y, Li S, Yan L (2008) Joining of SiC ceramic to graphite using Ni–Cr–SiC powders as filler. Mater Sci Eng A 368–372:304–308CrossRefGoogle Scholar
  8. 8.
    Gotoh Y, Okamura H, Kajiura S et al (1998) Development and material testing of OF-Cu/DS-Cu/OF-Cu triplex tube (dispersion strengthened copper clad with oxygen free-copper) and trial fabrication of a vertical target mock-up for ITER divertor. J Nucl Mater S258–263:271–274CrossRefGoogle Scholar
  9. 9.
    Mortimer DA, Nicholas M (1973) The wetting of carbon and carbides by copper alloys. J Mater Sci 8:640–648.  https://doi.org/10.1007/BF00561219 CrossRefGoogle Scholar
  10. 10.
    Sobczak N, Sobczak J, Rohatgi P, Ksiazek M, Radziwill W, Morgiel J (1998) In: High temperature capillarity, HtcGoogle Scholar
  11. 11.
    Yang L, Shen P, Lin Q, Feng Q, Jiang Q (2011) Effect of Cr on the wetting in Cu/graphite system. Appl Surf Sci 257:6276–6281CrossRefGoogle Scholar
  12. 12.
    Song XG, Chai JH, Hu SP, Cao J, Feng JC, Tang DY (2017) A novel metallization process for soldering graphite to copper at low temperature. J Alloys Compd 696:1199–1204CrossRefGoogle Scholar
  13. 13.
    Mao W, Noji T, Teshima K, Shinozaki N (2016) Wettability of molten aluminum-silicon alloys on graphite and surface tension of those alloys at 1273 K (1000 °C). Metall Mater Trans A 47:3201–3212CrossRefGoogle Scholar
  14. 14.
    Sun Z, Zhang LX, Qi JL, Zhang ZH, Tian CL, Feng JC (2015) Brazing of SiO2f/SiO2 composite modified with few-layer graphene and Invar using AgCuTi alloy. Mater Des 88:51–57CrossRefGoogle Scholar
  15. 15.
    Fu W, Song XG, Zhao YX et al (2017) Effect of Ti content on the wetting behavior of Sn0.3Ag0.7Cu/AlN system. Mater Des 115:1–7CrossRefGoogle Scholar
  16. 16.
    Singh M, Shpargel TP, Morscher GN, Asthana R (2005) Active metal brazing and characterization of brazed joints in titanium to carbon-carbon composites. Mater Sci Eng A 412:123–128CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbinChina
  2. 2.Shandong Provincial Key Lab of Special Welding TechnologyHarbin Institute of Technology at WeihaiWeihaiChina
  3. 3.Department of Chemistry, School of ScienceHarbin Institute of TechnologyHarbinChina

Personalised recommendations