Non-metallic phases

The Electrical Double Layer at the Electrolyte-Non-metallic Phase Interface... 

Gas phase transition metal cluster chemistry lies along critical connecting paths between different fields of chemistry and physics. For example, from the physicist s point of view, studies of clusters as they grow into metals will present new tests of the theory of metals. Questions like How itinerant are the bonding electrons in these systems and Is there a metal to non-metal phase transition as a function of size are frequently addressed. On the other hand from a chemist point of view very similar questions are asked but using different terminology How localized is the surface chemical bond and What is the difference between surface chemistry and small cluster chemistry Cluster science is filling the void between these different perspectives with a new set of materials and measurements of physical and chemical properties. 

Dillmann, P., Populus, P., Fluzin, P., et al. (1997). Microdiffraction of synchrotron radiation - identification of non-metallic phases in ancient iron products. Revue De Metallurgie-Cahiers d Informations Techniques 94 267-268. 

The magnetic behaviour of V203 and of the Ti-doped alloys is shown in Fig. 6.6. It can be seen that the susceptibility is higher in the metallic than the non-metallic phase. The drop in the susceptibility with temperature above about... 

Due to the potential high-temperature application of nanocomposites, as well as the fact that metal-reinforced ceramic nanocomposites combine metal and non-metal phases in equilibrium, it is important to understand the oxidation resistance of such materials. Using the Ni-alumina system as an example, and following Sekino et al.,12 the partial pressure of oxygen required to prevent the formation of nickel spinel (NiAl204) from a two-phase mixture of Ni and A1203 can be described as 58,59... 

Other data demonstrate the dendritic (not smooth) movement of the inner botmdary during the metallization of the film. Thus, the needles of dendrites pierce through the film before the metallization is completed, and then the deposit contains some amount of a non-metal phase together with the crystals of the metal product. After cooling down the deposit to the ambient temperature, the partly reduced constituent of the deposit (that is, LVI) often can be disproportionate, giving very fine metal powder dispersed between the larger primary crystals of the metal in the final product. 

On the contrary, when the iraiic conductivity is higher than the electronic one, the film should grow continuously. Then, after sufficiently long time of electrolysis, the complications are inevitable due to the accumulation of non-metal phases at the anode. 

At high temperatures, certain gases that are normally considered harmless can undergo a chemical reaction with metals or with non-metallic phases present in an alloy such as carbides. The most common gases found in high temperature corrosion are ... 

As follows from Table 141, the FeOCl structure is met with cations that prefer octahedral coordination. Evidently Table 141 is very incomplete. The Hf analogs of the listed compounds will certainly have the same structure. Perhaps the anions S or Se will be electronegative enough to ensure a non-metallic phase NbNS or TaNSe Needless to say that all the listed FeOCl representatives are non-metallic. 

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