Preparation and tensile properties of Fe₇₈Si₉B₁₃/Ni laminated composite

Fe₇₈Si₉B₁₃/Ni laminated composite was prepared in the form of three-ply (Ni-Fe₇₈Si₉B₁₃-Ni) laminated structure by the pulse electrodeposition method. The microst ructures of the laminated composite were investigated by SEM and TEM. The average grain size of Ni layers is about 50 nm. The laminated composite has a good interfacial bonding between amorphous layer and nano-Ni layers. The laminated composite possesses a very high tensile strength (2090 MPa) and reasonable tensile elongation (8. 5 %) at room temperature , which is much larger than that of monolithic amorphous Fe₇₈Si₉B₁₃ribbon (1. 39 %). The elongation of 115. 5 % was obtained at 450℃, which is greatly higher than that of such amorphous ribbon (36. 3 %). The aim of enhancing the plasticity of amorphous ribbon by producing laminated composite is achieved.