Determination Features of the Component Diffusion Coefficients of the Fe-Cr-Ni-Gr Powder Systems Sintering

Abstract:

To predict structuring and to produce Fe-Cr-Ni-Graphite-based powdered alloys with tailor-made properties, the component diffusion coefficients have been determined that allow calculating sintering or homogenizing annealing parameters of heterogeneous charge products. It has been revealed that Fe, Cr and Ni heterodiffusion coefficients are influenced not only by their own concentration, but also by structuring kinetics and the number and distribution of the graphite in charge. The electron-probe test shows the distribution of the components in the in-terparticle contact zones. Using the Motano’s, the Lubov’s and the Maksimov’s methods, the values of mutual diffusion coefficients depending on the component concentration have been determined. Using Darken’s ratios and having experimentally determined the component interparticle zones and the displacement distance, the partial heterodiffusion coefficients have been calculated. The given paper proves that the powder-component grain-size distribution alloys should be selected on the basis of relative values of the heterodiffusion coefficients.

• Periodical: Materials Science Forum (Volume 870)
• Pages: 286-292
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.870.286
• Online since: September 2016
• Authors: V.G. Perederiy*, B.G. Gasanov, P.V. Sirotin
• Keywords: Components, Diffusion Coefficients, Electron-Probe Test, Grain-Size Distribution, Homogenization, Structuring

References

[1] Ya. E. Geguzin, Physics of sintering, Science, Moscow, (1984).

[2] V. Hermel, Mass transfer processes at sintering, Nauk. dumka, Kiev, (1987).

[3] V.D. Jones, Fundamentals of powder metallurgy, Pressing and sintering, Mir, Moscow, (1965).

[4] B.S. Bokstein, Thermodynamics and kinetics of diffusion in solid bodies, Metallurgy, Moscow, (1974).

[5] S.D. Gertsriken, Diffusion in metals and alloys in a firm phase, State publishing house of physical and mathematical literature, Moscow, (1960).

[6] A.A. Zhukhovitsky, Physical chemistry, Metallurgy, Moscow, (1987).

[7] M.A. Krishtal, Diffusive processes in iron alloys, Metallurgizdat, Moscow, (1963).

[8] V. N. Antsiferov, V. B. Akimenko, Sintered alloy steel, Metallurgy, Moscow, (1983).

[9] Yu.G. Dorofeyev, Constructional powder materials and products, Metallurgy, Moscow, (1986).

[10] B.G. Gasanov, P.V. Sirotin, Powder materials for components operating under impact-abrasive wear conditions, Metallurgist. 55 (2011) 196-201.

DOI: 10.1007/s11015-011-9412-8

[11] I.B. Borovsky, Processes of mutual diffusion and homogenization of alloys, Nauka publishing house, Moscow, (1973).

[12] B.S. Bokstein, Diffusion in metals, Metallurgy, Moscow, (1978).

[13] V.N. Antsiferov, Mutual diffusion and homogenization in powder materials, Metallurgy, Moscow, (1988).

[14] B.G. Gasanov, Mutual diffusion and homogenization in powder alloys: Monograph, SRSPU, Novocherkassk, (2002).

[15] Y. Suzuki, Effect of Various Factors on the Dimensional Changes on Sintering of Fe-Cu-C Powder Compacts, PM World Congress, Granada, Spain. 3 (1998) 191-196.

[16] I.N. Kidin, Processes of diffusion at sintering alloy steel, received from mix powders, Ceramic-metal ceramic materials, Kiev, (1972).

[17] V. N. Antsiferov, V. B. Akimenko, Sintered alloy steel, Metallurgy, Moscow, (1983).

[18] L.N. Dyachkova, Diffusive interaction of components and structurization at sintering of powder constructional and antifrictional materials, 50 years of powder metallurgy of Belarus, History, achievements, perspectives, Minsk, 2010, pp.230-250.

[19] B.G. Gasanov, Homogenization of medium-sintered alloy powder steel, Universities News North-Caucasus region: Tekhn. Sciences. 3 (2013) 25-28.