Abstract
The diffusion bonding of zirconium-2.5 pct niobium to carbon steel with an interlayer of platinum has been investigated. Bonds were produced by heating samples in a furnace under compressive loading. Metallography of the bonds revealed that at both the Fe-Pt and the Pt-Zr/Nb interfaces, interdiffusion and the formation of thin bands of intermetallic phases occurred during bonding. The presence of FePt3 was detected at the former interface and several intermetallics including Pt3Zr at the latter. In both cases, intermetallic compound formation resulted in an increase in microhardness in the bond region; this was particularly severe at the Pt-Zr/Nb interface where cracking was observed to occur during, metallographic sample preparation. Bonding at temperatures above 1150 °C caused eutectic melting at the Pt-Zr/Nb interface.
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Wayman, M.L., Smith, R.R. & Wright, M.G. The diffusion bonding of Zr-2.5 pct Nb to steel. Metall Trans A 17, 429–434 (1986). https://doi.org/10.1007/BF02643949
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DOI: https://doi.org/10.1007/BF02643949