Structure and Properties of Graphite-Molybdenum Brazed Joints

Authors

  • S. Maksymova Brazing Department, Paton Electric Welding Institute of the NAS of Ukraine, 11, K. Malevych St., Kyiv, 03150, Ukraine
  • V. Voronov Brazing Department, Paton Electric Welding Institute of the NAS of Ukraine, 11, K. Malevych St., Kyiv, 03150, Ukraine
  • P. Kovalchuk Brazing Department, Paton Electric Welding Institute of the NAS of Ukraine, 11, K. Malevych St., Kyiv, 03150, Ukraine
  • A. Larionov Brazing Department, Paton Electric Welding Institute of the NAS of Ukraine, 11, K. Malevych St., Kyiv, 03150, Ukraine

DOI:

https://doi.org/10.56801/MME989

Keywords:

graphite; molybdenum; brazed joints; brazing filler metal; structure; properties.

Abstract

The paper presents the results of X-ray microspectral studies of dissimilar brazed joints of molybdenum with graphite. It is shown that during active brazing of graphite with molybdenum, mutual diffusion processes occur, and the adhesion-active brazing filler metals penetrates into graphite, and interacts with it, which leads to the formation of carbide phases. When using the Ti-Cr-V and Cu-Ti-Ni systems brazing filler metals, titanium carbides are formed. The zirconium carbides are formed, when using the brazing filler metals based on the Zr-Pd(Mo) systems and the CxMey(Mo, Cr) carbides  are formed using the brazing filler metals of the Pd-Ni-Cr-Ge system. The results of tests for three-point bending showed that the using of Pd-Ni-Cr-Ge brazing filler metals provides stable strength at the level of 34-37 MPa, destruction occurs along graphite.

References

Frohs, W. and H. Jaeger, Industrial Carbon and Graphite Materials: Raw Materials, Production and Applications. 2021: John Wiley & Sons.

Zhou, Z.-J., Z.-H. Zhong, and C.-C. Ge, Silicon doped carbon/Cu joints based on amorphous alloy brazing for first wall application. Fusion engineering and design, 2007. 82(1): p. 35-40.

Crossreff

Zhong, Z., Z. Zhou, and C. Ge, Brazing of doped graphite to Cu using stress relief interlayers. Journal of materials processing technology, 2009. 209(5): p. 2662-2670.

Crossreff

Staffler, R., et al. Metal/graphite-composites in fusion engineering. in IEEE Thirteenth Symposium on Fusion Engineering. 1989. IEEE.

Hiraoka, Y. and S. Nishikawa, Joining of single-crystalline molybdenum and carbon-ceramics by using palladium and palladium-silver alloy as brazing metal. International Journal of Refractory Metals and Hard Materials, 1996. 14(5-6): p. 311-317.

Crossreff

E. Petrunin: Reference book on brazing, M., Mashinostroenie, (2003). 480.

Šmid, I., et al., Brazed graphite/refractory metal composites for first-wall protection elements. Journal of nuclear materials, 1991. 179: p. 169-172.

Crossreff

M. H. Horner, P. W. Trester, P.G. Valentine: Patent US 006554179B2, B23K 31/02, (2003).

А. Doria, F. Gnesotto, M. Monari, In: Proceedings, 14th IEEE/NPSS Symposium, San Diego, CA, USA 1992, p. 952-955.

Maksymova, S., P. Kovalchuk, and V. Voronov, Vacuum brazing of Kovar-molybdenum dissimilar joints. The Paton Welding J., 7, 13-18. 2021.

T. Tits, J. Wilson: Refractory metals and alloys, Translation from English: Metallurgia, (1968). 352.

Fedotov, I., et al., Study of the microstructure and thermomechanical properties of Mo/graphite joint brazed with Ti–Zr–Nb–Be powder filler metal. Journal of Materials Science, 2021. 56: p. 11557-11568.

Crossreff

Dong, L., et al., Metallurgical and mechanical examinations of molybdenum/graphite joints by vacuum arc pressure brazing using Ti-Zr filler materials. Journal of Materials Processing Technology, 2017. 249: p. 39-45.

Crossreff

Li, S., et al., A review on filler materials for brazing of carbon-carbon composites. Reviews on Advanced Materials Science, 2021. 60(1): p. 92-111.

Crossreff

Singh, M., R. Asthana, and T. Shpargel, Brazing of carbon–carbon composites to Cu-clad molybdenum for thermal management applications. Materials Science and Engineering: A, 2007. 452: p. 699-704.

Crossreff

Singh, M. and R. Asthana, Characterization of brazed joints of CC composite to Cu-clad-Molybdenum. Composites Science and Technology, 2008. 68(14): p. 3010-3019.

Crossreff

Zhang, L., et al., Preparation of the graphene nanosheets reinforced AgCuTi based composite for brazing graphite and Cu. Journal of Alloys and Compounds, 2019. 782: p. 981-985.

Crossreff

Chen, Z., et al., Surface modification on wetting and vacuum brazing behavior of graphite using AgCu filler metal. Surface and Coatings Technology, 2018. 348: p. 104-110.

Crossreff

Duo, L., et al., Brazing of C/C composite and Ti-6Al-4V with graphene strengthened AgCuTi filler: Effects of graphene on wettability, microstructure and mechanical properties. Chinese Journal of Aeronautics, 2018. 31(7): p. 1602-1608.

Crossreff

Yu. V. Naydich, G. A. Kolisnechenko: The Interaction of metals melts with diamond and graphite surface. Kiev, Naukova Dumka. (1990).

Lu, Q., et al., TZM/graphite interface behavior in high-temperature brazing by Ti-based brazing filler materials. Welding in the World, 2020. 64: p. 1877-1885.

Crossreff

V. Khorunov, S. Maksymova, S. Samokhin, V. Ivanchenko, In: Procceedings of the Third Intern, Conference. «High temperature capillarity» (HTC-2000), Japan, Osaka, 2001, p. 419-424.

Massalski, T., Вinary alloy phase diagrams.—. American Society for metals. Ohiо: Metals Park: ASM International: СD, 1990.

Radzievskii, V. and G. Tkachenko, High-temperature vacuum brazing in compressor manufacturing K. Ekotekhnologia. p, 2009. 400.

Wei, Y., et al., Microstructure and performance of graphite/TZM alloy joints with different interfacial structures formed by vacuum diffusion bonding. International Journal of Refractory Metals and Hard Materials, 2020. 92: p. 105287.

Crossreff

Downloads

Published

2023-03-31

How to Cite

S. Maksymova, V. Voronov, P. Kovalchuk, and A. Larionov. 2023. “Structure and Properties of Graphite-Molybdenum Brazed Joints”. Metallurgical and Materials Engineering 29 (1):115-28. https://doi.org/10.56801/MME989.

Issue

Vol. 29 No. 1 (2023)

Section

Research

License

Copyright (c) 2023 S. Maksymova, V. Voronov, P. Kovalchuk, A. Larionov

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms:

  • Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
  • Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
  • Authors are permitted and encouraged to post their published articles online (e.g., in institutional repositories or on their website, social networks like ResearchGate or Academia), as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

 

Creative Commons License
Except where otherwise noted, the content on this site is licensed under a Creative Commons Attribution 4.0 International License.