Fabrication of Fe-TiB₂Composite Powder by High-Energy Milling and Subsequent Reaction Synthesis

Abstract

································································································································································································································Abstract TiB 2 -reinforced iron matrix composite (Fe-TiB 2 ) powder was in-situ fabricated from titanium hydride (TiH 2 ) and iron boride (FeB) powders by the mechanical activation and a subsequent reaction. Phase formation of the composite powder was identified by X-ray diffraction (XRD). The morphology and phase composition were observed and measured by field emission-scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDS), respectively. The results showed that TiB 2 particles formed in nanoscale were uniformly distributed in Fe matrix. Fe 2 B phase existed due to an incomplete reaction of Ti and FeB. Effect of milling process and synthesis temperature on the formation of composite were discussed.

Impression creep behaviour of TiB2 particles reinforced steel matrix composites

“…In recent years, various methods have been adopted for the synthesis of steel matrix composites such as casting [11], powder metallurgy (P/M) [12,13], selfcombustion high-temperature synthesis (SHS) [14], laser surface melting, plasma spray synthesis, mechanical alloying (MA) [15][16][17] and many other methods. Compared with the different methods, P/M is a costeffective way for manufacturing high-performance products containing a wide range of reinforcements.…”

Low temperature controllable synthesis of transition metal and rare earth borides mediated by molten salt

“…The negative Gibbs energy values calculated by using the Factsage package (Figure 4), 60 along with the relevant thermodynamic data and phase diagrams reported in the literature 1,6,11,23,[60][61][62][63][64][65][66][67][68][69][70] suggest that the reaction between a transition metal or rare earth metal, and elemental boron is thermodynamically favourable, at all the temperatures, which is the thermodynamic basis behind various synthesis routes, including the conventional high-temperature and high pressure arc-melting, 71,72 high temperature solid-state reaction, 73,74 as well as long time mechanical alloying. [74][75][76] Given the extremely exothermic nature of Reaction (1), 1,6,[60][61][62][63][64][65][66][67][68][69][70] the so-called self-propagating high-temperature synthesis (SHS) was also used. 77,78 These synthesis approaches suffer from various disadvantages, for example requirement of high temperature/pressure and/or long processing time and/or high agglomeration of product boride.…”

Powder metallurgy processed TiB2-reinforced steel matrix composites: a review

“…Khoa et al. [118] proposed a novel rapid, simple and cost-effective synthesis process for fabrication of TiB 2 -reinforced iron matrix composite (Fe–TiB 2 ) using titanium hydride (TiH 2 ) and ferroboron (FeB) as starting materials. Huynh et al.…”