Aluminium-iron phases

Gio] Giorgi, M.-Y, Guillot, J.-B., Nicolle, R., Assessment of the Zinc-Aluminium-Iron Phase Diagrams in the Zinc-Rich Comer , Calphad, 25(3), 461-474 (2001) (Phase Diagram, Phase Relations, Thermodyn.,, 36). 

Besides the FeNiAl9 compound layer, two more phases were revealed at the interface between a 25 mass % Fe-75 mass % Ni alloy and the saturated aluminium melt. At a smaller dipping time of 900 sec, cracking was not so pronounced as at 3600 sec, and the layers adjacent to the alloy base could readily be investigated by electron probe microanalysis. The first measurement was carried out at a distance of 2 pm away from the alloy-intermetallic interface, while the other measurements were made at a step of 2.5 pm towards the aluminium matrix. The following set of aluminium, iron and nickel contents (at.%) was obtained (Camebax SX50) ... 

Illustrate the species distribution for the elements aluminium, iron(II) and iron(III). Then, model a water treatment in terms of an open aeration with atmospheric oxygen (oxidation ). What happens to the Al- and Fe species Which mineral phases will presumably precipitate during the aeration ... 

If the result for aluminate is negative, this phase is absent and its composition should be replaced in the matrix A by that of the low- aluminium ferrite phase given in Table 1.2. From the compositions ) and proportions found for the two ferrite components, the content and composition of the ferrite may be estimated. Similarly, if the result for ferrite is negative, the ferrite composition is replaced by that j of low-iron aluminate. These conditions will occur at ARs below about < 1.0 and above about 4.0, respectively. The data for the low-aluminium ... 

Copeland et al. (C39,C25) treated CjS pastes, and C-S-H prepared in other ways, with various sources of AP, Fe or S04 ions. The XRD peaks of the phases providing the ions disappeared, and changes occurred in the micromorphology of the gels and in the non-evaporable water contents and fractions of the CaO extractable by an organic solvent. It was concluded that the ions were taken up by the C-S-H and that up to about one silicon atom in six could be replaced by aluminium, iron or sulphur, and that aluminium and iron could also replace calcium. These results suggested that the principal hydration product in Portland cement pastes was a substituted C-S-H, a conclusion that later appeared to be supported by the results of the... 

The grey colour of Portland cements is due to the presence of the names ferrite phases in absence of elements other than calcium, aluminium, iron and oxygen, calcium... 

Aluminium-Iron. Figure 3.1-13 shows the Al-rich part of this system. The solubility of Fe in Al is very low. In the range shown AlsFe is formed by a peritectic reaction at 1160 °C. The eutectic between the Al phase and AIbFc crystallises in a degenerate manner to form brittle needles of Al3Fe. The formation of AIbFb needles is also occurring in Al—Fe—Si alloys such as commercially (available) pure aluminium (Fig. 3.1-14). 

Aluminium-Iron-Silicon. Figure 3.1-20 shows the M-rich corner as a section for 0.5 wt% Fe. This concentration range is of particular interest for commercially pure, unalloyed Al. Apart from the solid solution and the AlFe and Si phases there are two ternary phases, i. e., a-Ali2Fe3Si and 8-Al9Fe2Si2. The exact... 

In addition to the 3-phase, the most potent cathodes in Mg-Al alloys were thought to be the iron-rich phases the iron-aluminium intermetallic phase FeAl is one of the most detrimental cathodic phases in Mg-Al alloys on the basis of its potential and low hydrogen over-voltage [22]. AlMn [17,18] is also detrimental, and Mg2Si [18] seems to have no influence, while Mg2Pb facilitates localised corrosion and leads to a negative difference effect. 

Rag] Raghavan, V., The Al-Fe-Mo (Aluminium-Iron-Molybdenum) System , in Phase Diagrams of Ternary Iron Alloys , Indian Institute of Metals, Calcutta, India, Part 6A, 135-141 (1992) (Phase Diagram, Review, 9)... 

Mei] Mei, J., Halldeam, R.D., Xiao, P, Mechanisms of the Aluminium-iron Oxide Thermite Reaction , Scr. Mater., 41(5), 541-548 (1999) (Crys. Stmcture, Experimental, Morphology, Phase Diagram, Phase Relations, 8)... 

Rag] Raghavan, V., The Al-Fe-P System (Aluminium-Iron-Phosphorus) , J. Alloy Phase Diagrams, 5(1), 32-39 (1989) (Review, Crys. Structure, Phase Diagram, Phase Relations, 5)... 

Dix] Dix Jr., E.H., Heath Jr., A.C., Equilibrium Relations in Aluminium-Silicon and Aluminium-Iron-Silicon Alloys of High Purity , Trans. AIME, Inst. Met. Div., 93, 164-197 (1928) (Phase Diagram, Experimental,, , 39)... 

Fus] Fuess, V., Aluminium-Iron-Silicon in Metallography of Aluminium and Its Alloys (in German), Berlin, 109-117 (1934) (Phase Diagram, Experimental, 6)... 

Jae] Jaeniche, W., On the System Aluminium-Iron-Silicon (in German), Alum. Arch., (5), 1-21 (1936) (Crys. Stracture, Phase Diagram, Experimental,, , 28)... 

Spi] Spiegelberg, A.P.W., Danielsson, S.L.A., Astroem, H., The Crystal Structure of Some Phases Occurring in Alloys of Aluminium, Iron and Silicon and Their Relationship to Other Phases , Acta Crystallogr., 7, 634 (1954) (Crys. Structure, Experimental,, 4)... 

Mun] Munson, D., A Clarification of die Phases Occuring in Aluminium Rich Aluminium-Iron-Silicon Alloys with Particular Reference to the Ternary Phase a-AIFeSi , J. Inst. Met., 95, 217-219 (1967) (Crys. Structure, Phase Diagram, Experimental,, 12)... 

Igl] Iglessis, J., Frantz, C., Gantois, M., Conditions for the Formation of the Iron Phases in Commercial Purity Aluminium-Silicon Alloys (in French), Mem. Sci. Rev. Metall., 74, 237-242 (1977) (Experimental,, 14)... 

Riv] Rivhn, V.G., Raynor, G.V., Phase Equilibria in Iron Ternary Alloys 4 Critical Evaluation of Constitution of Aluminium-Iron-Silicon System , Int. Met. Rev., 26,133-152 (1981) (Phase Diagram, Review,, , 56)... 

Kre] Krendelsberger, N., Constitution of the Systems Aluminium-Manganese-Silicon, Aluminium-Iron-SiUcon, und Aluminium-Iron-Manganese-Silicon , Thesis, Inst, of Physical Chemistry, University of Vienna, 2001 (Crys. Stractuie, Phase Diagram, Experimental,, , 83)... 

Vol] Volkova, M.A., Kornilov, I.I., Study on the Phase Constitution of Alloys of the Ternary Titanium-Aluminium-Iron System (in Russian), Khim. Met. Splav., 1, 77-80 (1973) (Phase Diagram, Phase Relations, Experimental,, , 9)... 

Mon] Mondolfo, L.F., Aluminium-Iron-Zine , in Metallography of Aluminum Alloys , John Wiley and Sons, Ine., New York (1943) 98-99 (Phase Diagram, Review, 1)... 

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