The effects of microstructure on the mechanical properties of Al2O3-NiAl composites

Influence of non-reactive particles on the microstructure of NiAl and NiAl–ZrO2 processed by thermal explosion

“…This high mechanical reinforcement is attributed to an increase in dislocation density induced by prestraining NiAl at high temperature. This mechanism of dislocation induced plasticity has been also highlighted for NiAl-PSZ [28] and NiAl-Al 2 O 3 [29] composites using transmission electron microscopy. Therefore, it is possible that a similar prestraining effect of the NiAl matrix results from the residual stresses generated during the reactive process and improves significantly the mechanical properties.…”

Elastic properties of Al2O3–NiAl: a modified version of Hashin–Shtrikman bounds

“…The H-S bounds are always narrower, that is, more accurate, than the other bounds. In H-S model, the composite system is considered as composed of two phases in which one is randomly distributed particulate phase and other is continuous matrix phase [3,4,9,10].…”

“…For this comparison, we consider Al 2 O 3 -NiAl composite, whose experimental data are available in the whole range of composition. Al 2 O 3 -NiAl is not a perfectly bonded material because of the relatively weak interface [10]. Variation in inclusion volume fraction can change the characteristics of bonding, as a result elastic constant of the material changes [3].…”

Phase equilibria on Ni–Al interface under low oxygen pressure

“…However, at room temperature, these materials are limited by relatively poor strength, low ductility, and the tendency to brittle fracture [6,7,11]. Many researchers [8,10,11,1,12,13] have developed processes for fabricating intermetallic compounds. These methods include mechanical alloying (MA) [8], rolling [9] and thermal contact diffusion [10].…”