Phase content of interfaces Ti / Al3Ti in metal-intermetallic laminate studied by x-ray and synchrotron diffraction
- Dr. Vitaliy PILYUGIN
- Dr. Alexander PATSELOV (M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences)
In the Ti–Al3Ti composites produced by reaction sintering of titanium and aluminum foils under pressure, any oxides that accumulate at the front of an intermetallic reaction form a thin extended region in the forming intermetallic Al3Ti layer. This region can be a weak point in the microstructure of the laminate composite material. Sintering route was optimized to minimize the quantity of oxides particles (basically Al2O3 particles) in order to improve some mechanical properties. The phase content of micron composite layers was studied by x-ray and synchrotron diffraction. X-ray diffraction (Bragg-Brentano geometry with a flat-plate sample) showed that composite layers basically contain only Ti and Al3Ti phases. Synchrotron diffraction (a transmission mode to pass through the 390 micron thickness sample layer) allowed to reveal the presence of residuals of aluminum phase. Also, the frame capture mode, using of synchrotron beam with the size 0.4×0.1 mm, allowed to prove the absence of Al2O3 phase particles along the Ti / Al3Ti interfaces.
Diffraction experiments were performed at the 4-th SI-channel of VEPP-3 beam station. The research was carried out within the state assignment of FASO of Russia (theme "Deformation" No. 01201463327).