Pre-infiltration and brazing behaviors of Cf/C composites with high temperature TiSi eutectic alloy

摘要: Abstract A novel method is developed to join carbon fiber reinforced composites (Cf/C composites) via a two-step approach using Ti14Si86 metal foil as the joining material. The infiltration behavior, joint microstructure, interface reaction, fracture characteristics and mechanism are investigated. preparation of almost compact deposit layer carbide can immediately heal pores Cf/C form gradient composite structure, which effectively minimize impact coefficient thermal expansion (CTE) mismatch between outer reaction matrix avoid excessive filler in brazing step. process reveals that growing SiC Ti Si eutectic structure seam also behave graded CTE beneficial for strengthening joint. Compared with direct brazing, this obtain more reliable joints due strong interfacial bonding structure. As result, favorable shear strength 26 MPa achieved within 10 min at temperature 1400 °C.