Of your ceramic. Researchers have been functioning to improve the joining amongst dissimilar materials by diffusion bonding. Barrena et al. [40] investigated the joining of Ti6Al4V to Al2 O3 by diffusion bonding applying as interlayer an Ag-Cu alloy (72 wt. Ag, 28 wt. Cu) having a thickness of 60 made by electron beam evaporation. The interface’s Olesoxime custom synthesis microstructure was composed of various Ti-Cu phases and (Ag), as well as the shear tests showed a maximum of 140 MPa obtained at a MRTX-1719 Protocol temperature of 750 C and also a dwell time of 30 min. Yu et al. [10] joined Ti6Al4V to Ti2 SnC applying Cu foil (50 ) as an interlayer in Ar atmosphere performed at a temperature of 750 C for the duration of 60 min; a fairly low temperature was allowed as a result of the destabilization of Ti2 SnC that occurs beneath 700 C. The interface’s microstructure is formed mostly by Ti3 Cu4 and TiCu4 , and the maximum value obtained in the shear tests was around 86 MPa [10]. Kliauga and Ferrante [41] joined Al2 O3 to AISI304 stainless steel using a commercial Ti sheet having a thickness of 500 by diffusion bonding processed at 800 C in the course of 180 min and at 900 and 1000 C throughout 120 min beneath a pressure of 15 MPa in vacuum. The authors investigated the interfacial reaction solutions of Ti/Al2 O3 . The microstructure characterization on the surface fracture showed that the composition depends upon the temperature and dwell time. The joints created at a temperature of 800 C for 180 min exhibit the Ti3 Al phase in the interface close to the titanium base material, although TiAl is observed around the ceramic side. Even so, for joints obtained at 900 and 1000 C throughout 120 min, the interface is constituted only by Ti3 Al. In comparable operate, Travessa and Ferrante [42] diffusion bonded the exact same base supplies and interlayer at 700 C for 120 min, and 800 C for 15 and 120 min. The experiments have been unsuccessful, and no reaction may very well be noticed in the interface. Rocha et al. [43] joined pure Ti to Al2 O3 by diffusion bonding at 800 C for 90 min below a stress of 5 MPa. The characterization with the Ti/Al2 O3 interface identified the presence of TiAl adjacent to alumina and Ti3 Al adjacent to pure Ti. Additionally, the authors applied galvanic corrosion tests to study the chemical degradation in the interfaces, and also the final results showed that the corrosion resistance was impaired by the TiAl phase. Throughout the joining of Ti to Al2 O3 , TiAl intermetallic phase generally comes up in zones adjacent to alumina, as well as the TiAl/Ti3 Al ratio can enhance together with the thickness with the Ti interlayer [44]. While some functions referred to low temperature bonding (75000 C), the improvement of new approaches really should be investigated to lower the formation of (Ag) in the interface, as may be the case when Ag-based alloys are utilized as interlayers. The presence of (Ag) is detrimental for the service temperature and need to be avoided. The objective on the present perform consists in the study from the feasibility of joining Ti6Al4V to Al2 O3 by diffusion bonding applying titanium as interlayer material. Diverse titanium interlayers had been investigated: Ti thin films deposited onto Al2 O3 base material by magnetron sputtering and freestanding Ti thin foils. The joints processed making use of Ti foilsMetals 2021, 11,3 ofhave a reduced processing cost and are a lot more simple than these making use of thin films obtained by magnetron sputtering. Nonetheless, the lack of adhesion amongst the Ti foils and ceramics may well make it hard to get sound joints. The Ti interlayer was selected to.