Joining of ultra-refractory carbides

Brazing of ZrB2–SiC–C ceramic and GH99 superalloy to form reticular seam with low residual stress

“…However, more attention has been paid to the joining of ZrB 2 base ceramics and only a few studies on UHTCs like ZrC base [11][12][13], HfC base [13,14] and HfB 2 base [15,16] ceramics have been reported. Brazing, diffusion bonding [11,12], transient-liquidphase (TLP) bonding [13][14][15] and inorganic glass interlayer joining [17] methods have been explored to join UHTCs. Brazing, due to its few limits of joints structure and joining pressure, has become the most explored method for joining UHTCs for practical applications.…”

Homogenization of the zirconium carbide–titanium interface domain

“…This is achieved by a composition homogenization of a melting-point depressant inserted into the core layer at the interface of the ceramics [9,10]. Most often Mo, Ti, Pd, Nb and Ni-Cr alloys have been used as high melting core composite interlayers [11].…”

In situ transmission electron microscopy studies of the kinetics of Pt-Mo alloy diffusion in ZrB2 thin films

“…For example, refractory oxides are bonded to metallic super alloys in thermal barrier coatings, and sintered composites of refractory borides 8 and carbides 9 are attractive for aerospace applications. The common methods employed to improve the wettability and adhesion at the heterogeneous ceramic-ceramic and metal-ceramic interfaces involve physical and chemical modification of the interfaces via deposition of a low-melting and/or a reactive metal.…”