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Phenomena of Intergranular Liquid Film Formation in Technology

DOI: 10.4236/msce.2015.31002    2,392 Downloads   2,710 Views  
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The phenomena of the first order phase transition (two-dimensional melting) of grain boundary at temperatures 0.6 - 0.9 TS0 (of the solid state melting point), discovered by the author (1971), is a fundamental property of solid crystalline materials. This finding leads to a principal revision of the scientific concepts of the solid state of substance. The phenomenological description and justification of the finding are developed. The generalized equation of Clausius-Clapeyron type for two-dimensional phase transition was obtained by applying the mathematical tools of the film thermodynamics. The equation has been used for calculating the grain boundary phase transition(GBPhT) temperature TSf of any metal, which TSf value lies within the range of (0.55 - 0.86) TS0. The investigation outcomes are applied to develop the methodology for more effective hard coating formation by synthesis of nanosize nitrides and carbonitrides in surface layers of steels and nickel alloys using a thermo-chemical processing (TChP). Production of an overall nitrogen concentration gradient from 4% to 0.5% at within surface layers leads to formation of modified coatings with a stepped change in properties. The mechanical behavior of new tools at the industrial tests indicated a higher heat resistance (nickel alloys), high resistance to surface wears and fragile breaks-down (chromium tool steels). A short overview of the results of some graded alloys characterization is presented.

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The authors declare no conflicts of interest.

Cite this paper

Minaev, Y. (2015) Phenomena of Intergranular Liquid Film Formation in Technology. Journal of Materials Science and Chemical Engineering, 3, 8-14. doi: 10.4236/msce.2015.31002.


[1] Minaev, Yu.A. (1972) Surface Layers of Pure Substances. ZhFKh, 46, 1090-1094.
[2] Kuznetsov, O.A. (Ed.) (2005) Scientific Discoveries: Collection of Short Descriptions of Scientific Discoveries, Scientific Hypotheses, 2004. RAEN, Moscow. (In Russian)
[3] Flad, A. (1970) Interphase Boundary Gas-Solid. Mir, Moscow, 18. (In Russian)
[4] Frenkel, Ya.I. (1959) Kinetics Theory of Liquids. RAN USSR, Moscow, Lenin-grad.
[5] Slezov, V.V. (1981) Effective Coefficient of Grain Boundary Diffusion in Polycrystals. Dokl.AN USSR, 257, 871-875.
[6] Harrison, L.G. (1961) Influence of Dislocations on Diffusion Kinetics in Solids with Particular Reference to the Alkali Halides. Transactions of the Faraday Society, 57, 1191-1199.
[7] Bokshtein, S.Z., Kishkin, S.T., Mishin, Y.M. and Razumovsky, I.M. (1985) Theory and Experimental Verification of the Method of Separate Determination of Boundary Diffusion Coefficient and the Diffusion Width of the Grain Boundaries. Dokl.AN USSR, 280, 1125-1128.
[8] Ralph, B. (1968) Field-Ion Microscopy. Plenum Press, Cambridge.
[9] Rusnaov, A.I. (1967) Phase Equilibria and Surface Phenomena. Khimiya, Leningrad. (In Russian);
[10] Krotov, V.V. and Rusanov, A.I. (1999) Physicochemical Hydrodynamics of Capillary Systems. Imperial College Press, London.
[11] Inoko, F. and Yoshikawa, T. (1996) Deformation, Recrystallization and Premelting in Bicrystals. Materials Science Forum, 204-206, 379-388.
[12] Minaev, Yu.A. (2007) Phase Transitions in Surface Layers of Polycrystalline Solids. ZhFKh, 81, 1-4.
[13] Kablov, E.N. (2001) Alloy Blade Turbine Engines. Alloys. Technology. Coating. MISiS, Moscow. (In Russian)

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