The microstructure of the sintered body was investigated by scanning electron microscopy (SEM) on polished samples etched with 1 wt% phosphoric acid for about 30 s and coated with a gold film.
The microstructure of the sintered body was investigated by scanningelectron microscopy (SEM) on polished samples etched with 1 wt% phosphoric acid for about 30 s and coated with a gold film.