Infiltration behavior of Cu and Ti fillers into Ti2AlC/Ti3AlC2 composites during tungsten inert gas (TIG)brazing. Issue 3 (15th February 2018)

• Record Type: Journal Article
• Authors: Chiker, N.; Haddad, A.; Hadji, Y.; Benammar, M.E.A.; Azzaz, M.; Yahi, M.; Sahraoui, T.; Hadji, M.; Barsoum, M.W.
• Is Part Of: Ceramics international. Volume 44:Issue 3(2018)
• Page Start: 3282
• Page End: 3290
• Publication Date: 2018-02-15
• Subjects: MAX phase -- Joining -- Microstructure -- Hardness -- Brazing -- TIG process; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.11.102
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Herein we study the infiltration behavior of Ti and Cu fillers into a Ti2 AlC/Ti3 AlC2 MAX phase composites using a TIG-brazing process. The microstructures of the interfaces were investigated by scanning electron microscopy and energy dispersive spectrometry. When Ti2 AlC/Ti3 AlC2 comes into contact with molten Ti, it starts decomposing into TiC x, a Ti-richandTi3 AlC; when in contact with molten Cu, the resulting phases are Ti2 Al(Cu)C, Cu(Al), AlCu2 Ti and TiC. In the presence of Cu at approximately 1630 °C, a defective Ti2 Al(Cu)C phase was formed having a P 63/ mmc structure. Ti3 AlC2 MAX phase was completely decomposed in presence of Cu or Ti filler-materials. The decomposition of Ti2 AlC to Ti3 AlC2 was observed in the heat-affected zone of the composite. Notably, no cracks were observed during TIG-brazing of Ti2 AlC/Ti3 AlC2 composite with Ti or Cu filler materials.