Nickel theoretical distribution

Figure 10. Theoretical distribution of nickel in the presence of (A) iron oxide and NT A ( Ni = NTA j, = M, I = 0.01, FeOOH ...

The affine transformations of the experimental data have been used to describe reduction of nickel oxide to nickel. Experimental curves were compared subsequently with the theoretically calculated maps from Ref. [316]. The roll-type mechanism of nuclei growth with equal probability of the size distribution has been established in Ref. [316]. For this mechanism of nuclei growth the kinetic pre-exponential factor A can be given as ... 

Vibrating sample magnetometry (VSM), a technique that was described in detail by Van Stiphout [6], was performed with the unsupported mixed oxalates, which were decomposed in a 10% HyN2 flow at 400 °C. The magnetization of the sample was measured at 77 K as a function of the applied field strength (maximum 12 kOe). The size distribution of the nickel particles was obtained by fitting the thus measured magnetization curve with theoretical curves calculated for discrete particle sizes. 

The positions of coordination maxima on the radial distribution curve (r.d.c.) correspond to BCC-structure of NiAl too, but there ara deviations from theoretical values as to the distribution of their areas. Table 2 gives the relationships betwen the areas of experimental r.d.c. maxima and theoretical P t for a model relating to a non-distorted structure NlAl (Nl/Al=50/50) and for a model, describing a solid solution on the NiAl-basis (Nl/Al=35/65). It is seen that the second model fully corresponds to experiment. Hence MA alloys are. Indeed, able to produce solid solutions on the NiAl-basis losing up to 40% of nickel atoms. 

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