Effect of nanometric oxide dispersion on creep resistance of ODS-FeAl prepared by mechanical alloying

Oxidation resistance of SHS Fe–Al–Si alloys at 800 °C in air

“…During compaction of these powders, further chemical reactions inside the powder particles are undesirable. This technology enables to produce modern oxidedispersion strengthened (ODS) FeAl-based materials containing particles of thermally stable oxides (Y 2 O 3 , ZrO 2 ) [11]. However, these powder metallurgy processes using pre-alloyed intermetallic powders have a specific problem in poor compressibility and sinterability of these powders.…”

Structural and thermal properties of Fe3Al, Fe3AlC and hypothetical Fe3AlX (X=H, B, N, O) compounds: Ab initio and quasi-harmonic Debye modelling

“…The introduction of dispersoid particles, which also restrain the grain size, is an effective way to improve these weaknesses [5]. In B2-FeAl for example, additions of fine particles of Y 2 O 3 or FeAl 2 O 4 are known to increase the creep resistance [6,7]. The presence of these fine stable particles refines significantly the grain size and improves further ductility, strength and hardness [5,8,9].…”

Dual-scale oxide dispersoids reinforcement of Fe–40at.%Al intermetallic coating for both high hardness and high fracture toughness

“…It is considered that the introduction of dispersing fine, incoherent, non-shearable nanosized oxide particles of low volume fraction into FeAl matrix can inhibit the movement of dislocation, stabilize the structure and eventually result in the improved high temperature strength and thus make cermets with FeAl intermetallics as the binder phase exhibit high performance at elevated temperatures. Wolski et al [16] reported the oxide dispersion strengthening of FeAl prepared by mechanical alloying, coupled with in situ oxidation and followed by low temperature sintering. More than threefold increase in the flow stress at 727 • C was achieved.…”

“…Meanwhile, micrometric dispersing particles can also be introduced by this technique through designing the starting materials [18]. Subsequent low temperature sintering can result in the transformation of the in situ formed oxidation products into nanometric oxides [16,17]. Cold spraying (CS) is an emerging coating deposition process in which high velocity spray powder particles (300-1200 m/s) at relatively low temperature (from room temperature to about 800 • C) impact onto the substrate, and are deposited on the substrate through severely plastic deformation [19,20].…”

“…One of the methods to obtain uniform distribution of nanometric oxide dispersion is in situ synthesis by mechanical alloying [16,17]. Meanwhile, micrometric dispersing particles can also be introduced by this technique through designing the starting materials [18].…”