Nano-infiltration and transient eutectic (NITE) phase joining SiC ceramics at 1500oC

Microstructure and Shear Strength of SiC Joint Brazed with LiAlSiO4 Reinforced AgCuTi Composite Filler

“…Presently, solid-state diffusion bonding [10], brazing [11], pressureless glass-ceramic joining [12], transient liquid phase welding [13], and MAX phase joining [14] are the primary SiC joining techniques. Because of its economic cost, easy implementation, and high-quality joining results, the brazing method has found widespread use in the aeronautics and space industries [15].…”

Pressureless joining of SiC ceramics with magnesia‐alumina‐silica glass ceramics

“…The intricate shaped SiC hardware is fabricated by joining simple shaped parts. Thus, there is continued research thrust to develop economical joining techniques fulfilling the structural and functional requirements of the target applications 12–45 …”

“…In general, the polymer‐derived ceramic joints processed at 1200−1400°C have poor irradiation tolerance attributed to the intrinsic irradiation instability of amorphous structures with excess carbon and oxygen formed during the pyrolysis 14,23,24 . The transient eutectic joining using SiC‐based mixed oxide additives requires relatively high processing temperatures (1400−1900°C) and application of pressure (10−20 MPa), which restricts its application to simple 2D parts 14,25,26 …”

“…19,20 The application of metallic filler joining is limited to low-temperature structural applications due to its poor high-temperature strength and oxidation resistance and poor irradiation tolerance. 14,21,22 The nonmetallic filler joining technique includes polymer-derived ceramic joining, 23,24 transient eutectic-phase joining using SiC-based mixed oxide additives, 14,25,26 and glass-ceramic joining. [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] In general, the polymer-derived ceramic joints processed at 1200−1400 • C have poor irradiation tolerance attributed to the intrinsic irradiation instability of amorphous structures with excess carbon and oxygen formed during the pyrolysis.…”

“…14,23,24 The transient eutectic joining using SiC-based mixed oxide additives requires relatively high processing temperatures (1400−1900 • C) and application of pressure (10−20 MPa), which restricts its application to simple 2D parts. 14,25,26 In comparison to the technique discussed above, glassceramic joining is an inexpensive and simple technology that can be readily used in industries for joining large and complex SiC hardware for nuclear and structural applications. The glass-ceramic joints are processed at intermediate temperatures (1050−1600 • C) without an applied pressure and exhibit high joint strengths, appreciable irradiation tolerance for certain compositions, tunable thermal and mechanical properties, high-temperature strength retention (<1000 • C), high oxidation resistance, and selfhealing above glass softening point.…”