Spark Plasma Sintering of Fe-TiC Composite Powders

Abstract

Fe-TiC composite powder was fabricated by high-energy milling of powder mixture of (Fe, TiC) and (FeO, TiH 2 , C) as starting materials, respectively. The latter one was heat-treated for reaction synthesis of TiC phase after milling. Both powders were spark-plasma sintered at various temperatures of 680-1070 o C for 10 min. with sintering pressure of 70 MPa and the heating rate of 50 o C/min. under vacuum of 0.133 Pa. Density and hardness of the sintered compact was investigated. Fe-TiC composite fabricated from (FeO, TiH 2 , C) as starting materials showed better sintered properties. It seems to be resulted from ultra-fine TiC particle size and its uniform distribution in Fe-matrix compared to the simply mixed (Fe, TiC) powder.

in situ Fabrication of Fe-TiB2 Nanocomposite Powder by Planetary Ball Milling and Subsequent Heat-treatment of FeB and TiH2 Powder Mixture

“…The in situ fabrication method is known to be extremely effective for producing a fine and homogeneous distribution of particulate reinforcements in a matrix [2][3][4][5][6][7]. It usually includes the synthesis of a dispersoid phase within a matrix enthalpy value [10][11][12], the formation of nanostructured powders [13], good sinterability [14], and etc.…”