Metals dominating factors

Erosion-corrosion of these components was caused by high-velocity turbulent flow resulting from incomplete opening of the valve. In this case, erosion is the dominant factor in the metal loss, corrosion being a minor contributing factor. 

Mn(N03)4] , [Fe(N03)4] and [Sn(N03)4], which feature dodecahedral coordination about the metal [Ce(N03)5] in which the 5 bidentate nitrate groups define a trigonal bipyramid leading to tenfold coordination of cerium (Fig. 11.17b) [Ce(N03)6] and [Th(N03)6] , which feature nearly regular icosahedral (p. 141) coordination of the metal by 12 O atoms and many lanthanide and uranyl [U02] complexes. It seems, therefore, that the size of the metal centre is not necessarily a dominant factor. 

It is interesting to note that the development of plate materials from graphite to composite to metal is a process from application of the expansive pure graphite to less graphite in composites until no graphite is contained in the metals. In a certain sense, the development process may suggest cost reduction as a dominant factor in the development of plate materials and plates when the other requirements are maintained. 

It is tempting to relate the thermodynamics of electron-transfer between metal atoms or ions and organic substrates directly to the relevant ionization potentials and electron affinities. These quantities certainly play a role in ET-thermo-dynamics but the dominant factor in inner sphere processes in which the product of electron transfer is an ion pair is the electrostatic interaction between the product ions. Model calculations on the reduction of ethylene by alkali metal atoms, for instance [69], showed that the energy difference between the M C2H4 ground state and the electron-transfer state can be... 

The equilibrium in equation (94) is generally defined as a mass-distribution ratio such as that shown above for cation-exchange resins (equation 93), and the position of the equilibrium is determined by the relative Concentration of the counter-ion ML/- and the co-ion X-. The nature of the quaternary amine has little effect on the equilibrium properties of the resin, and the chemistry of metal complex formation in aqueous solution is the dominant factor. 

This process is enhanced by bulky phosphines, thus butatriene formation seems to require a sterically congested environment. Otherwise the 1,3-enyne becomes the major product. Steric interaction between the phosphine ligand and the butenynyl group seems to be the dominant factor promoting 1,3-metal migration to form (Z)-cumulcnes (Scheme 3) [ 21]. 

The particular metals and metallization processes may be very significant. For devices involving Schottky barriers the metal work functions may be important, but the process by which the metallization is created may be the dominant factor. Surface states at the silicon interface could make the particular metal insignificant. In some cases the metallization is governed by compatibility with available lithographic procedures. 

The stractures of the alkali metal fullerides may be considered to be intercalation compounds of the fee lattice of the Ceo host formed by filhng the interstitial sites. Superconductivity has been investigated in detail for the alkali metal and mixed alkah metal phases of composition AgCeo where the conduction band is half filled. Critical temperatures as high as 31.3 K (in Rb2CsCeo) have been observed. A clear correlation between unit cell size and Tc is observed, and it has been suggested that the conduction bandwidth controlled by the separation between the molecules is the dominant factor in determining Tc. 

Ionic path impedance through the ceramic phase and electronic path impedance through the metallic phase have been found to be dominant factors in determining the electrode characteristics.In order to provide a low sheet resistance anode, it is imperative that the metallic and ceramic phases have maximized continuous paths that allow ionic and electronic migration from the electrolyte/anode interface throughout the entire anode. 

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