Abstract
Si-Ti-C-O fibre-assembled ceramic composites were joined with 72Ag-26Cu-2Ti filler metal at 1123 K and 1223 K in vacuum. The composites consisted of Si-Ti-C-O fibres, which were assembled unidirectionally, and oxide material filling the spaces between the fibres. During the joining process, frothing occurred at the joining interfaces. Joining interfaces were observed by SEM and analysed by electron probe microanalysis and X-ray diffraction. The strength of the joints was evaluated by four-point bending tests. Most of Si-Ti-C-O fibre/filler metal interfaces and the oxide material/filler metal interfaces were firm without cracking and separation. At the fibre/metal interfaces, a high concentration of titanium was confirmed. Among the specimens joined at 1123 K, the average strength, measured by the bending test, was 96 MPa. It was inferred that the defects at the joining interfaces formed by frothing had decreased the strength of the joints. Metallizing of the surfaces to be joined with the same filler metal as a pretreatment before joining, was effective in preventing frothing during joining and improving the joining strength. The average strength of the joints with pretreatment was 211 MPa.
Similar content being viewed by others
References
T. Ishikawa,New Ceram. 7 (10) (1994) 7.
T. Yamamura, M. Shibuya, H. Ohtsubo andT. Hiratsuka, in “Proceedings of the 1st International Symposium on Science of Engineering Ceramics”, edited by S. Kimura and K. Niihara (Ceramic Society of Japan, Tokyo 1991) p. 399.
T. Yamamura, T. Ishikawa, M. Shibuya, T. Hisayuki andK. Okamura,J. Mater. Sci. 23 (1988) 2589.
J. D. Cawley,Am. Ceram. Soc. Bull. 68 (1989) 1619.
M. Nakamura andI. Shigematsu,J. Mater Sci., submitted.
T. Yano, H. Suematsu andT. Iseki,ibid. 23 (1988) 3362.
S. Kato, T. Yano andT. Iseki,J. Ceram. Soc. Jpn 101 (1993) 325.
H. Okamura, M. Sakamoto andT. Shida,J. Jpn Weld. Soc. 8 (1990) 108.
T. Mah, N. L. Hecht, D. E. McCullum, J. R. Hoenigman, H. M. Kim, A. P. Katz andH. A. Lipsitt,J. Mater. Sci. 19 (1984) 1191.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Nakamura, M., Shigematsu, I. Joining of Si-Ti-C-O fibre-assembled ceramic composites with 72Ag-26Cu-2Ti filler metal. J Mater Sci 31, 6099–6104 (1996). https://doi.org/10.1007/BF01152166
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01152166