Mechanical behavior and microstructural analysis of alumina–titanium brazed interfaces
作者： M.C.A. Nono , J.J. Barroso , P.J. Castro
DOI: 10.1016/J.MSEA.2006.07.113
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摘要: Abstract The ceramic–metal joints for electrical and vacuum engineering devices require high-density alumina ceramic low glass phase content. Consequently it is necessary to introduce variations in the standard method of metallizing. Our assembly was designed minimize difference thermal expansion between titanium flanges, composed by part/Mo–Mn film/Ag–Cu brazing alloy/Ni layer/titanium part. Its transversal section observed SEM analyzed scanning EDS. submitted traction test obtain σ × ɛ curves study mechanical behavior. EDS results indicated that superficial pores were filled out molybdenum resulting a bonded interface. In same way, copper from Ag–Cu alloy Mo–Mn layer, modifying original composition. fracture occurred part this related formation Al 2 [(Mo, Mn)O 4 ] 3 crystalline alumina—Mo–Mn interface, which contributes increase adherence metallic layer ceramic. resistance interface increased diffusion copper.
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