Systematics alloying theory

A systematic investigation of dehydrogenation activity over a variety of metal alloy catalysts has been made by Schwab and co-workers (51-53), who have successfully interpreted their results in terms of the bulk metal theory. The test reaction used, namely the dehydrogenation of formic... 

Only a few systematic studies have been made of the effect of fluid flow on the ECP of power plant alloys in high-temperature water, even though theory suggests that the effect should be substantial under certain conditions [43]. Because the theoretical predictions, from the mixed-potential model (MPM) [43] and more recently the advanced mixed-potential model (AMPM) [47], preceded systematic experimental studies, it is appropriate to discuss the theoretical predictions first. 

Also somewhat neglected in their details are the various results on inter rare earth alloys. A number of such have been mentioned where appropriate, but the bulk have been left out as they do not at this stage add clarity to the situation in the pure metals. This does not mean to say that heat capacity work on inter rare earth alloys is of no consequence. On the contrary, there is a great need for systematic heat capacity studies of these alloys according to crystal structure and magnetic structure. Here also, theory cannot progress further without support from experiments on high purity specimens which have been well characterized with respect to the polymorphic phase(s) present. 

A qualitatively different type of precipitation patterns concerns structures formed during the electrodeposition of alloys. In 1938, Raub and Schall observed the formation of propagating wave patterns during the electrodeposition of silver-indium alloy [9, 10]. However, their observation was widely ignored, because no systematic theory was available that could classify these patterns as typical features of systems far from thermodynamic equilibrium. In 1986, the phenomenon was studied by Krastev and Nikolova in the possibly related electrodeposition of a silver-antimony alloy (Figure 11.1) [11]. Furthermore, very similar patterns were observed by Saltykova et al. during the electrodeposition of iridium-ruthenium alloy from molten salts [12]. 

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