Development of Ti PVD Films to Limit the Carburization of Metal Powders during SPS Process

Spark plasma sintering technique is used for the fabrication of dense materials with a fine-grained microstructure. In this process, powder placed into graphite mold and uniaxial pressure applied by two punches. A foil inserted between punches to ensure good electrical, physical thermal contact. One major drawbacks during metal powders carburization in contact foils. study, PVD coating titanium was on foils (pure iron). The results are promising, as investigations show that application Ti film 1.5 1.1 µm thickness effective completely avoid iron powder. Carbon diffuses inside sintering. parallel, diffusion revealed thickness. On other hand, 0.5 provides protection against carbon just sides mold, proving represents an important parameter consider.