Effect of ternary additions of iron on microstructure and microhardness of the intermetallic NiAl in reactive sintering

New Entropic Routes for Nano‐Bands and Nano‐Particles

“…Yet toughness increases are sometimes noted. Except for the possibility of higher ductility with solute additions that alter the lattice parameter [50][51][52][53], no satisfactory explanation exists for the reported large increase in toughness with the small solute additions or by initiating combustion at intermediate initial temperatures. For example, Fe which shows little preference for Ni or Al sites [54] and reduces the lattice parameter, significantly increases the ductility, but only somewhat increases the toughness.…”

Effect of different B contents on the mechanical properties and cyclic oxidation behaviour of β-NiAlDy coatings

“…Among many methods to improve the mechanical properties of b-NiAl at ambient temperature, the addition of suitable microalloying elements is one of feasible and effective approaches [9][10][11][12]. Boron has been considered as one of traditional boundary toughening elements which is chosen as potentially beneficial addition because it suppresses intergranular fracture and dramatically improves ductility in Ni 3 Al.…”

Mechanical alloying and field assisted hot pressing of nanocrystalline B2-NiAl intermetallic compound

“…26,27 Several consolidation methods have been carried out successfully for NiAl and other intermetallic alloys, from reactive sintering of different NiAl-matrix composites -where the effect of ternary element additions on the combustion synthesis has been studied -to the HIP process. [28][29][30] However, in order to achieve a good control on the microstructure of the final components, activated sintering techniques are the best choice to obtain homogeneous, near-full dense materials, avoiding grain growth. These activated sintering refers to those techniques that lower the activation energy for sintering.…”