Abstract
Surface energies are the major factors determining behavior during liquid phase sintering. The minimum criteria for successful liquid phase sintering are i) a low temperature liquid, ii) solubility of the solid in the liquid, and iii) liquid wetting of the solid grains (1). These conditions result in a reduction in surface energy with liquid spreading. At high volume fractions of solid, the elimination of porosity and its associated surface energy requires shape accommodation on the part of the solid grains, which is dependent on solubility of the solid in the liquid. Furthermore the rate of microstructural coarsening during liquid phase sintering, as seen by the grain growth rate, increases with the solid-liquid surface energy. These factors lead to the conclusion that surface energy is the major driving force for densification.
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References
J. Gurland and J. T. Norton, “Role of the Binder Phase in Cemented Tungsten Carbide-Cobalt Alloys,” Trans. AIME, 1952, vol. 194, pp. 1051–1056.
L. E. Murr, Interfacial Phenomena in Metals and Alloys, Addison-Wesley Publ., Reading, MA, 1975.
C. Isenberg, The Science of Soap Films and Soap Bubbles, Tieto Ltd., Avon, United Kingdom, 1978.
J. H. Hildebrand and R. L. Scott, The Solubility of Nonelectrolytes, third edition, Dover Publ., New York, NY, 1964.
R. S. Burdon, Surface Tension and the Spreading of Liquids, second edition, Cambridge University Press, Cambridge, United Kingdom, 1949.
V. N. Eremenko, Y. V. Naidich, and I. A. Lavrinenko, Liquid-Phase Sintering, Consultants Bureau, New York, NY, 1970.
F. V. Lenel and T. Pecanha, “Observations on the Sintering of Compacts from a Mixture of Iron and Copper Powders,” Powder Met., 1973, vol. 16, pp. 351–365.
R. M. German, “Origin of the Necklace Structure in Liquid Phase Sintering,” Inter. J. Powder Met., 1986, vol. 23, in press.
A. M. Stoneham, “Ceramic Surfaces: Theoretical Studies,” J. Amer. Ceramic Soc, 1981, vol. 64, pp. 54–60.
N. Eustathopoulos and J. C. Joud, “Interfacial Tension and Adsorption in Metallic Systems,” Current Topics in Materials Science, vol. 4, E. Kaldis (ed.), North-Holland Publ., Amsterdam, Netherlands, 1980, pp. 281–360.
J. J. Burton and E. S. Machlin, “Prediction of Segregation to Alloy Surfaces from Bulk Phase Diagrams,” Phys. Rev. Lett., 1976, vol. 37, pp. 1433–1436.
E. D. Hondros and M. P. Seah, “Segregation to Interfaces,” Inter. Metals Revs., 1977, vol. 22, pp. 262–301.
D. Camel, N. Eustathopoulos, and P. Desre, “Chemical Adsorption and Temperature Dependence of the Solid-Liquid Interfacial Tension of Metallic Binary Alloys,” Acta Met., 1980, vol. 28, pp. 239–247.
M. P. Seah, “Grain Boundary Segregation,” J. Phys. F: Metal Phys., 1980, vol. 10, pp. 1043–1064.
J. F. Kuzmick and E. N. Mazza, “Studies on Control of Growth or Shrinkage of Iron-Copper Compacts During Sintering,” Trans. AIME, 1950, vol. 188, pp. 1218–1219.
C. Durdaller, “The Effect of Additions of Copper, Nickel and Graphite on the Sintered Properties of Iron-Base Sintered P/M Parts,” Prog. Powder Met., 1969, vol. 25, pp. 73–100.
I. A. Aksay, C. E. Hoge and J. A. Pask, “Wetting Under Chemical Equilibrium and Nonequilibrium Conditions,” J. Phys. Chem., 1974, vol. 78, pp. 1178–1183.
I. A. Aksay, C. E. Hoge, and J. A. Pask, “Phase Distribution in Solid-Liquid-Vapor Systems,” Surfaces and Interfaces of Class and Ceramics, V. D. Frechette, W. C. Lacourse and V. L. Burdick (eds.), Plenum Press, New York, NY, 1974, pp. 299–321.
J. White, “Microstructure and Grain Growth in Ceramics in the Presence of a Liquid Phase,” Sintering and Related Phenomena, G. C. Kuczynski (ed.), Plenum Press, New York, NY, 1973, pp. 81–108.
H. Fischmeister, A. Kannappan, L. Ho-Yi, and E. Navara, “Grain Growth During Sintering of W-Cu-Ni Alloys,” Phys. Sintering, 1969, vol. 1, pp. G1–G13.
P. E. D. Morgan and M. S. Koutsoutis, “Phase Studies Concerning Sintering in Aluminas Doped with Ti(+4),” J. Amer. Ceramic Soc, 1985, vol. 68, pp. C156–C158.
D. Y. Kim and A. Accary, “Mechanisms of Grain Growth Inhibition During Sintering of WC-Co Based Hard Metals,” Sintering Processes, G. C. Kuczynski (ed.), Plenum Press, New York, NY, 1980, pp. 235–244.
T. J. Whalen and M. Humenik, “Sintering in the Presence of a Liquid Phase,” Sintering and Related Phenomena, G. C. Kuczynski, N. Hooton and C. Gibbon (eds.), Gordon and Breach, 1967, New York, NY, pp. 715–74
D. J. Lee and R. M. German, “Sintering Behavior of Iron-Aluminum Powder Mixtures,” Inter. J. Powder Met. Powder Tech., 1985, vol. 21, pp. 9–21.
W. D. Kingery, “Densification During Sintering in the Presence of a Liquid Phase. I. Theory,”. J. Appl. Phys., 1959, vol. 30, pp. 301–306.
R. B. Heady and J. W. Cahn, “An Analysis of the Capillary Forces in Liquid-Phase Sintering of Spherical Particles,” Metall. Trans., 1970, vol. 1, pp. 185–189.
H. Emi, S. Endo, C. Kanaoka, and S. Kawai, “Measurement of Forces due to a Liquid Bridge between Spherical Solid Particles,” Int. Chem. Eng., 1979, vol. 19, pp. 300–306.
B. Derjaguin, “Concerning the Paper: ‘The Effect of Capillary Liquid on the Force of Adhesion between Spherical Solid Particles,’“ J. Colloid Interface Sci., 1968, vol. 26, p.253.
H. M. Princen, “Comments on ‘The Effects of Capillary Liquid on the Force of Adhesion between Spherical Solid Particles,’“ J. Colloid Interface Sci., 1968, vol. 26, pp. 249–253.
K. S. Hwang, “Analysis of Initial Stage Sintering in the Solid and Liquid Phase,” Ph.D. Thesis, Rensselaer Polytechnic Institute, Troy, NY, 1984.
V. Smolej and S. Pejovnik, “Some Remarks on the Driving Force for Liquid-Phase Sintering,” I. Metallkde., 1976, vol. 67, pp. 603–605.
W. Pietsch and H. Rumpf, “Haftkraft, Kapillardruck, Flussingkeitsvolumen und Grenzwinkel einer Flussigkeitsbrucke zwischen zwei Kugeln,” Chemie-Ing.-Techn., 1967, vol. 39, pp. 885–893.
G. Mason and W. C. Clark, “Liquid Bridges between Spheres,” Chem. Eng. Sci., 1965, vol. 20, pp. 859–866.
Y. V. Naidich, I. A. Lavrinenko, and V. Y. Petrishchev, “Study on the Capillary Adhesive Forces Between Solid Particles with a Liquid Layer at the Points of Contact. 1. Spherical Particles,” Soviet Powder Met. Metal Ceram., 1965, vol. 4, pp. 129–133.
W. J. Huppmann and R. Riegger, “Modelling of Rearrangement Processes in Liquid Phase Sintering,” Acta Met., 1975, vol. 23, pp. 965–971.
W. D. Kingery, “Sintering in the Presence of a Liquid Phase,” Ceramic Fabrication Processes, W. D. Kingery (ed.), John Wiley, New York, NY, 1958, pp. 131–143.
A. Crowson and J. W. Burlingame, “Activated Sintering of Steel Powders,” Processing of Metal and Ceramic Powders, R. M. German and K. W. Lay (eds.), The Metallurgical Society, Warrendale, PA, 1982, pp. 199–211.
A. P. Savitskii and N. N. Burtsev, “Compact Growth in Liquid Phase Sintering,” Soviet Powder Met. Metal Ceram., 1979, vol. 18, pp. 96–102.
A. P. Savitskii and L. S. Martsunova, “Effect of Solid-State Solubility on the Volume Changes Experienced by Aluminum During Liquid-Phase Sintering,” Soviet Powder Met. Metal Ceram., 1977, vol. 16, pp. 333–337.
R. F. Snowball and D. R. Milner, “Densification Processes in the Tungsten Carbide-Cobalt System,” Powder Met., 1968, vol. 11, pp. 23–40.
W. D. Kingery “Sintering in the Presence of a Liquid Phase,” Kinetics of High-Temperature Processes, W. D. Kingery (ed.), John Wiley, New York, NY, 1959, pp. 187–194.
A. M. Brown and M. F. Ashby, “Correlations for Diffusion Constants,” Acta Met., 1980, vol. 28, pp. 1085–1101.
W. Kehl and H. F. Fischmeister, “Liquid Phase Sintering of Al-Cu Compacts,” Powder Met., 1980, vol. 23, pp. 113–119.
V. Z. Bugakov, Diffusion in Metals and Alloys, National Technical Information Service, Springfield, VA, 1971.
A. P. Savitskii and N. N. Burtsev, “Effect of Powder Particle Size on the Growth of Titanium Compacts During Liquid-Phase Sintering with Aluminum,” Soviet Powder Met. Metal Ceram., 1981, vol. 20, pp. 618–621.
R. W. Heckel, R. D. Lanam, and R. A. Tanzilli, “Techniques for the Study of Homogenization in Compacts of Blended Powders,” Advanced Experimental Techniques in Powder Metallurgy, J. S. Hirschhorn and K. H. Roll (eds.), Plenum Press, New York, NY, 1970, pp. 139–188.
J. Beretka and T. Brown, “Effect of Particle Size on the Kinetics of the Reaction Between Magnesium and Aluminum Oxides,” J. Amer. Ceramic Soc., 1983, vol. 66, pp. 383–388.
J. Beretka, “Kinetic Analysis of Solid-State Reactions Between Powdered Reactants,” J. Amer. Ceramic Soc, 1984, vol. 67, pp. 615–620.
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German, R.M. (1985). Thermodynamic and Kinetic Factors. In: Liquid Phase Sintering. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-3599-1_3
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DOI: https://doi.org/10.1007/978-1-4899-3599-1_3
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