Advertisement

Journal of Materials Science

, Volume 26, Issue 16, pp 4399–4406 | Cite as

Effect of yttrium near the interface on reaction and strength of sintered-SiC/Ni couple

Papers

Abstract

The effect of yttrium on reaction and bending strength of a pressureless-sintered SiC/Ni couple solid-state bonded in the range 923–1193 K was studied. The reaction between SiC and Ni is retarded by yttrium which was mixed into the SiC and Ni surfaces to a few micrometres depth by electric discharge machining. Si diffusion into Ni is retarded significantly by yttrium, but Ni diffusion into the SiC boundary phase is not. The four-point bending strength of the joined couple at room temperature is slightly improved by the treatment (maximum strength ∼110 MPa). Void or coalesced voids were observed at the reaction zone front, where fracture mainly initiated. Yttrium decreases the tendency of void formation. Void formation might be due to an imbalance of interdiffusable amounts between Si in the SiC boundary phase and the Ni bulk.

Keywords

Polymer Yttrium Boundary Phase Reaction Zone Electric Discharge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    M. R. Jackson, R. L. Mehan, A. M. Davis and E. L. Hall, Metall. Trans. 14A (1983) 355.CrossRefGoogle Scholar
  2. 2.
    M. Sakai and K. Watanabe, J. Mater. Sci. 19 (1984) 3430.CrossRefGoogle Scholar
  3. 3.
    S. K. Choi, L. Froyen and M. J. Brabers, “Joining ceramics, glass and metal” (Informationsgesellschaft Verlag.Google Scholar
  4. 4.
    T. Yamada, H. Sekiguchi, H. Okamoto, S. Azuma and A. Kitamura, “Ceramic materials and components for engines” (Deutsche Keramische Gesellschaft, Lübeck-Travemünde, 1986) p. 441.Google Scholar
  5. 5.
    Y. Iino, T. Takamori, N. Mohri, N. Saito and M. Suzuki, J. Mater. Sci. Lett. 8 (1989) 493.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • Y. Iino
    • 1
  1. 1.Toyota Technological InstituteNagoyaJapan

Personalised recommendations