The type of aluminum oxide has a great effect on the loss of strength of nickel alloys with aluminum oxide. The γ-Al2O3 considerably increases the strength of the alloy. Possibly in this case the bond between the matrix and the oxide particles is stronger than the bond between nickel and α-Al2O3. Further experiments are needed to determine the type of bond between nickel and aluminum oxide.
It is assumed that a high degree of cold-plastic deformation leads to the loss of strength of nickel+γ-Al2O3 at the same temperature as the loss of strength of nickel+α-Al2O3 because of the very different deformation capacities of nickel and the γ-Al2O3.
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Borok, V.A., Zaitseva, R.D., Karpman, G.M. et al. Hardening and softening of nickel alloys containing aluminum oxide. Met Sci Heat Treat 8, 206–208 (1966). https://doi.org/10.1007/BF00660389
- Nickel Alloy
- Oxide Particle