PTLP bonding C/C composites to super-alloy GH3044 with Ni/Ti interlayer

C/C composites can be jointed to super-alloy GH3044 with Ni/Ti interlayer by partial transient liquid-phase(PTLP) bonding under vacuum.Microstructures and element distribution were characterized by SEM and EDS.Interfacial structure of Ni/GH3044 diffusion layer + residual Ni layer + Ni-Ti intermetalics + reaction layer was formed under experimental conditions.With the increase of holding time,Ni3Ti intermetalic layer between NiTi and Ni gradually grew,while NiTi and Ni were consumed.However,large-size cracks were observed near the C/C composite/interlyer interface,resulting in unsatisfactory performance of obtained joints,with the shear strength of only 9.78 MPa.