Abstract
The wetting of ceramic materials by metallic melts is the most important characteristic of brazing alloys. The effect of chromium additions to copper-base alloys on the wetting of silicon nitride was investigated. Wetting experiments were carried out on Si3N4 using liquid Cu-Cr, Cu-Ni-Cr, Cu-Si-Cr and Cu-Ni-Si-Cr alloys. The addition of chromium to liquid copper up to its solubility limit promoted wetting on Si3N4. Improved wetting with a higher chromium content was achieved by the addition of nickel to the Cu-Cr alloys. The formation of an interfacial reaction layer, which is detrimental for brazing ceramics, was suppressed by the addition of silicon to the chromium-containing brazing alloys.
Similar content being viewed by others
References
M. G. Nicholas, D. A. Mortimer, L. M. Jones andR. M. Crispin,J. Mater. Sci. 25 (1990) 2679.
D. H. Kim, S. H. Hwang andS. S. Chun,Ceramic. Int. 16 (1990) 333.
P. Kristalis, L. Courdrier andN. Eustathopoulos,J. Mater. Sci. 26 (1991) 3400.
M. G. Nicholas, in “Joining of Ceramics”, edited by M. G. Nicholas, (Chapman and Hall, London, 1990) 73.
Yu. Naidich, Prog. Surf. Memb. Sci.14 (1981) 353.
P. Xiao andB. Derby,Acta Metall. Mater. (1995) accepted.
P. Kristalis, V. Merlin, L. Courdrier andN. Eustathopoulos,ibid. 40 (1992) 1167.
D. J. Chakrabarti andD. E. Laughlin,Bull. Alloy Phase Diagr. 5 (1984) 59.
E. A. Brandes andG. B. Brook, “Smithells Metals Reference Book”, 7th Edn (Butterworths, London, 1992).
Y. Austin Chang, K. Fitzner andMin-Xian Zhang,Prog. Mater. Sci. 32 (1988) 97.
S. D. Peteves, M. Moulaert, andM. G. Nicholas,Metall. Trans. 23A (1992) 1773.
M. Nakamura andS. D. Peteves,J. Am Ceram. Soc. 73 (1990) 1221.
R. H. Davies, A. T. Dinsdale, T. G. Chart, T. I. Barry andH. M. Rand,High Temp. Sci. 26 (1990) 251.
M. Hamalainen, K. Jajskelainen, R. Luoma, M. Nuotio, P. Taskinen andO. Teppo,CALPHAD 14 (1990) 125.
P. Kritsalis, B. Drevet, N. Valignat andN. Eustathopoulos,Script Metall. Mater. 30 (1994) 1127.
D. Chatain, I. Rivollet andN. Eustathopoulos, J. Chim Phys.83 (1986) 561.