Study on the structure and properties of An Al/Ni nanoscale multilayer used for TLP bonding of IC10 superalloy

Al/Ni nanoscale multilayer films were prepared by magnetron sputtering and applied to the transient liquid phase (TLP) diffusion bonding of IC10 superalloy. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) were used to study the reactive characteristics of the prepared Al/Ni multilayer films. The microstructures and mechanical properties of the IC10 superalloy joints were characterized. The results indicate that reliable joints of IC10 superalloy can be achieved using Al/Ni nanoscale multilayer films with modulation periods of 65 nm and 125 nm, prepared by magnetron sputtering. The average tensile strengths of the IC10 butt joints at room temperature are 877.3 MPa and 836.5 MPa, respectively, which are greater than 87% of the tensile strength of the base material. The fracture surfaces of the tensile specimens at room temperature mainly exhibit fine dimple morphology, showing obvious ductile fracture characteristics.