Abstract
Mass transfer of nickel to the hot leg (454 C, 850 F) of a mercury thermal convection loop in which titanium samples were exposed has been observed. This involved dissolution of nickel in mercury at 320 C (608 F), its transfer to the surface of the sample in the hot leg, and subsequent interdiffusion of nickel and titanium. Microprobe study of surface layers on the titanium sample indicated stratification of nickel. Outer layer contained two materials with compositions closely approximating those of TiNi and TiNi3, and an inner layer a material with nickel content close to the reported solubility limit for nickel in β-Ti, even though the reaction was conducted below α-β transformation temperature. Effects of other metallic additives are also discussed.
Summary of Results from First Experiment on Multi-Crystal Titanium Sample