Defect Control and Interfacial Microstructure of Laminated Composites of TiB_2-based Ceramic to 1Cr18Ni9Ti Stainless Steel by Reaction Fusion Bonding

摘要

By taking Ti-B_4C and CrO_3-Al as the primary system and the subsystem respectively, the curve dependence of CrO_3-Al subsystem on the adiabatic temperature of the reactive system was calculated in chemical dynamics, and laminated composite with TiB_2-based ceramic to stainless steel was achieved without Al_2O_3 inclusions and microcracks at the interface, and the intermediate was clearly presented between the ceramic and the stainless steel through liquid fusion and liquid diffusion of the ceramic liquid and the molten steel. Because of the differences in constitutional diffusion and solid precipitation, the hybrid microstructures was presented in the intermediate, i.e. within the intermediate the ceramic and metallic phases in different size were alternately distributed to form 3-D net ceramic-metal microstructure, while the continuously-graded microstructure from the TiB_2 matrix ceramic to stainless steel was also presented in both volume fraction and size of the TiB_2 and TiC phases.