Iron elastic properties

Table 3 Elastic properties of iron and iron-light-element alloys.

Convergence of estimates of the melting curve of iron places a tighter constraint on the temperature at the ICB. Experimental measurements and theoretical calculations of elastic properties and plastic deformation of iron offer new interpretations for the inner core anisotropy. Prehminary results have been obtained on the properties of liquid iron, which allow a more direct comparison between laboratory measurements and seismic observations. 

Sdderlind P., Moriarty J. A., and Wills J. M. (1996) First-principles theory of iron up to Earth-core pressures structural, vibrational, and elastic properties. Phys. Rev. B 53, 14063-14072. 

Kawakami, T., Nasu, S., Sasaki, T., Kuzushita, K., Morimoto, S., Endo, S., Kawasaki, S., Takano, M., High-Pressure Moessbauer Study of Perovskite Iron Oxides , J. Phys. Con-dens. Matter, 14(44), 10713-10718 (2002) (Experimental, Phase Diagram, Phys. Prop., 9) Ross, N., Angel, R.J., Seifert, F., Compressibility of Brownmillerite (Ca2Fe20s) Effect of Vacancies on the Elastic Properties of Perovskites , Phys. Earth Planet. Interiors, 129, 145-151 (2002) (Experimental, Crys. Strueture, 33)... 

Bel] Belyatskaya, I.S., Serebryakov, V.G., Anisotropy of Elastic Properties in Iron-Chromium-Cobalt Alloys , Phys. Met. Metallogr., 49(5), 189—190 (1980), translated from Fiz. Met. Metallovd., 49(5), 1113-1114 (1980) (Experimental, Phys. Prop., 5)... 

As the inner core is nearly isothermal (Stixrude et al. 1997), the comparison of the elastic properties of iron with those of the inner core determined seismologically provides a way to estimate the temperature in the earth s deep interior. This approach is... 

FIG. 2a. Comparison of three interatomic potentials for iron [11]. A was constructed by Chang and Graham [10a] to fit the elastic constants 0 2 and 44 of a-iron. B was constructed by Tsai and MacDonald [11] to fit the elastic properties of a-iron and the phase transition from the a-phase (bcc) to the -phase (hep) at 130 kbar. 3.90 angstroms, superscript 0 and 130 refer to pressures in kbar, sub-scripts 1 and 2 refer to first and second neighbor separations. C was constructed by Johnson [11b] to fit radiation damage data for a-iron. 

Another anomalous property of some nickel—iron aHoys, which are caHed constant-modulus aHoys, is a positive thermoelastic coefficient which occurs in aHoys having 27—43 wt % nickel. The elastic moduH in these aHoys increase with temperature. UsuaHy, and with additions of chromium, molybdenum, titanium, or aluminum, the constant-modulus aHoys are used in precision weighing machines, measuring devices, and osciHating mechanisms (see Weighing AND proportioning). 

Chapter 5. Physical Properties Under Elastic-Plastic Compression Table 5.1. Compressibilities of nickel-iron alloys (after Graham et al. [67G01]). 

A plugging material with 2-furaldehyde-acetone monomer and silicone oligomers has been described [1099]. The components for this material are shown in Table 18-1. The 2-furaldehyde-acetone monomer can contain mono-furfurylidene-acetone and difurfurylidene-acetone. The hardener can be iron chloride, benzene-sulfonic acid, hexamethylene diamine, or polyethylene polyamine. The plugging stone has improved strength, elastic-deformation, and anticorrosion and adhesion properties. 

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