A novel heat-resistant resin-based adhesive for high-temperature alloy connection and repair.

Abstract A modified superalloy-used heat-resistant adhesive, which can cure at room temperature and provide excellent bonding effect in a wide temperature range from RT to 1000 °C, was prepared from silicone resin as matrix, and Ni, Al, B 4 C, low-temperature-melting glass powder as additives. After pre-calcination, the bonding strength of adhesive reached 30.1 MPa after 700°C-calcination and maintained above 15.7 MPa during the whole heating process as the mixture of Ni-based intermetallics, heat-resistant ceramic generated and high viscosity glass generated in the adhesive. Without pre-calcination, the bonding strength still kept above 10.5 MPa during test from RT to 900 °C and decreased to 4.3 MPa at 1000 °C. Graphical abstract Image 1 Highlights • This adhesive provides excellent bonding strength from room temperature to 1000 °C for superalloys joining. • The bonding effect of adhesive at high temperatures is estimated by high-temperature shear test. • The practical use is "one-time joining at room temperature, valid to 1000 °C without post-processing". • This adhesive can be used not only for the manufacture of superalloy components but also for the repair of broken parts. [ABSTRACT FROM AUTHOR]