Magnetite mechanical properties

Nguyen T et al (2011) Characterisation of mechanical properties of magnetite-polymer composite films. Strain 47(sl) e467-e473... 

Besides layered silicates, other nanoparticles, including carbon nanotubes [105-112], and nanoscale magnetites [113], have been used to make PLA nanocomposites. Recently, carbon nanotubes have been the subject of considerable attention due to their unique and remarkable physical and mechanical properties. These unique properties have led to a significant amount of research on utilizing CNTs as new reinforcement in polymer composites. 

The mechanical properties were investigated in some early studies. In these studies, the creep properties [111], tensile strengths [112], flow stress [113] and high temperature hardness [113,114] of various oxides were measured. The mechanical properties of wustite were also related to scale-steel interface adhesion [115] and marker movement [116] in the wustite scale layer. Based on these early studies, it was concluded that at temperatures above 800°C, wustite was deformable, and even in the range of 650-800°C, wustite still possessed certain plasticity [117], while magnetite and hematite were not deformable even at 1000°C. 

Gallagher, KJ. Feifknecht,W. Marmweiler, U. (1968) Mechanism of oxidation of magnetite to Y-Fe20j. Nature 217 1118-1121 Gallias, J.L. (1998) Microstructure of the interfacial transition zone around corroded reinforcements. In Katz, A. Benier, M. Alexander, M. Arliguie, G. (eds.) The interfadal transition zone in cementitions composites. E.F.N. Spon, London, 171-178 Galvez, N. Barron,V. Torrent, J. (1999) Preparation and properties of hematite with structural phosphorus. Clays Clay Miner. 47 375-385... 

The literature pertaining to the catalytic properties of magnetite focuses primarily on the water-gas shift reaction. A number of reaction kinetics studies have been reported in which WGS reaction pathways have been proposed (1,2,7-18), In short, two types of mechanisms have been put forward, these being the adsorptive and regenerative mechanisms. In the adsorptive pathway, reactants adsorb on the surface where they react to form surface intermediates, followed by decomposition to products and desorption from the surface (12-18), Support for this adsorptive mechanism has been provided by tracer studies and apparent stoichiometric number analyses. Two such adsorptive mechanisms consistent with experimental observations are shown below. 

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