Joining of silicon nitride with a titanium foil interlayer

Mechanical properties of AISI 316L stainless steels joined with a commercial Ni based amorphous foil

“…For holding times of 5, 15 and 20 minutes, the strength of the joints were stronger for samples joined at 1105 8C than for those joined at 1170 8C. For instance, Lemus and Drew [6] attributed a decrement of the mechanical resistance of joints to a brittleness of the reaction products that increased as the joining temperature and time increased. In addition, it is important to point out that the resistance of materials decrease with the presence of stress concentrators, for example grain boundaries, dislocations and some punctual defects.…”

“…In this sense, Ni, Mg, Zr, Cu, Pd and more recently Fe-based amorphous foils have been used for joining Inconel 718 to Inconel X-750, Ti-based biomedical alloys, ceramic matrix composite to titanium metal and AISI 316 L stainless steel to itself, respectively [2][3][4][5]. On the other hand, it is well known that the surface roughness of the materials to be joined plays an important role on the bonding strength of the joints, mainly when the bonding process is in the liquid state of the filler element [6]. It is important to point out that metalmetal joints exert an important effect on engineering design, specially as structural elements; in this sense, the extensive use of metal joints on structural applications focuses to study the mechanical properties of the joints.…”

Interface behavior of Al2O3/Ti joints produced by liquid state bonding

“…Joints of Al 2 O 3 -Mo/Au/Ti combinations are formed through the formation of a reactive interface on the metal side of the sample as a result of diffusion and interaction of Au with Ti and Mo-coating and it can be explained since diffusion is more difficult in ceramics than metals (Lesage, 1994). Liquid formation plays an important role in the joining process, because it increases the rate of the interface a b formation, improving the contact area between the bonding materials, and consequently the interaction is higher, promoting rapid diffusion of the material, since liquid diffusion is much faster than the diffusion in solid-state (Lemus and Drew, 2003). The interface consisted of a homogeneous reaction layer produced by chemical interaction, as well as the high affinity of Au and Ti forming Ti 3 Au and TiAu phases.…”

Fabrication and Evaluation of Hybrid Components of Wc/Inconel 600 by Liquid State Diffusion Bonding

“…Joining ceramics to metals is a key technology in the use of advanced ceramics in complex structures [7,8]. Moreover, the use of advanced ceramics depends on the reliability of ceramic-metal joining processes and the properties of the resulting interfaces.…”

“…The mismatch in the CTE of the ceramic-metal joining materials can result in areas of high residual stresses at the interface during the cooling process [19] generating cracks or defects near the bonded zone. In solid-state diffusion bonding, the bonded zone should provide a strong junction between the two dissimilar materials, which means that the reaction product layer should not contain compounds that have mechanical properties significantly inferior to those of the metal and the ceramic [8,20]. The strength of diffusion bonded ceramics to metals depends on the nature and microstructure of the interface between the materials [21].…”