Abstract
In this discussion, the concern is with the properties of systems with high volume fractions of solid (typically over 50% solid at the sintering temperature), which includes most practical materials processed by liquid phase sintering techniques. There is a diversity of final microstructures possible by liquid phase sintering. The microstructure carries over to affect the properties, especially mechanical behavior. However, microstructure is not the only factor affecting the properties of liquid phase sintered materials (1,2). Table 9.1 lists the specific factors by categories of powder characteristics, sintering cycle, alloy composition, post-sintering heat treatment, sintered microstructure, and testing conditions. In light of such diversity, it is difficult to make specific statements about optimal conditions. However, there are some general results which provide insight to the links between composition, processing, microstructure, and properties.
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References
R. M. German and J. E. Hanafee, “Processing Effects on Toughness for Liquid Phase Sintered W-Ni-Fe,” Processing of Metal and Ceramic Powders, R. M. German and K. W. Lay (eds.), The Metallurgical Society, Warrendale, PA, 1982, pp. 267–282.
R. M. German, J. E. Hanafee, and S. L. DiGiallonardo, “Toughness Variation with Test Temperature and Cooling Rate for Liquid Phase Sintered W-3.5Ni-1.5Fe,” Metall. Trans. A, 1984, vol. 15A, pp. 121–128.
Z. Hashin, “Analysis of Composite Materials — A Survey,” J. Appl. Mech., 1983, vol. 50, pp. 481–505.
H. Doi, Elastic and Plastic Properties of WC-Co Composite Alloys, Freund Scientific Publications, Tel-Aviv, Israel, 1974.
H. Fischmeister and B. Karlsson, “Plastizitatseigenschaften Grob-Zweiphasiger Werkstoffe,” I. Metallkde., 1977, vol. 68, pp. 311–327.
R. K. Viswanadham and J. D. Venables, “A Simple Method for Evaluating Cemented Carbides,” Metall. Trans. A, 1977, vol. 8A, pp. 187–191.
G. Grathwohl and R. Warren, “The Effect of Cobalt Content on the Microstructure of Liquid-Phase Sintered TaC-Co Alloys,” Mater. Sci. Eng., 1974, vol. 14, pp. 55–65.
J. Gurland and P. Bardzil, “Relation of Strength, Composition, and Grain Size of Sintered WCCo Alloys,” Trans. TMS-AIME, 1955, vol. 203, pp. 311–315.
R. Warren and B. Johannesson, “The Fracture Toughness of Hardmetals,” Inter. J. Refractory Hard Met., 1984, vol. 3, pp. 187–191.
H. E. Exner and J. Gurland, “A Review of Parameters Influencing Some Mechanical Properties of Tungsten Carbide-Cobalt Alloys,” Powder Met., 1970, vol. 13, pp. 13–31.
F. V. Lenel, Powder Metallurgy Principles and Applications, Metal Powder Industries Federation, Princeton, NJ, 1980, pp. 383–400.
V. K. Sarin, “Cemented Carbide Cutting Tools,” Advances in Powder Technology, G. Y. Chin (ed.), American Society for Metals, Metals Park, OH, 1982, pp. 253–288.
J. Gurland, “A Structural Approach to the Yield Strength of Two-Phase Alloys with Coarse Microstructures,” Mater. Sci. Eng., 1979, vol. 40, pp. 59–71.
R. H. Krock, “Elastic and Plastic Deformation of Dispersed Phase Liquid Phase Sintered Tungsten Composite Materials,” Metals for the Space Age, F. Benesovsky (ed.), Metallwerk Plansee, Reutte, Austria, 1965, pp. 256–275.
C. Nishimatsu and J. Gurland, “Experimental Survey of the Deformation of the Hard-Ductile Two-Phase Alloy System WC-Co” Trans. ASM, 1960, vol. 52, pp. 469–484.
B. Paul, “Prediction of Elastic Constants of Multiphase Materials,” Trans TMS-AIME, 1960, vol. 218, pp. 36–41.
H. Krock, “Some Comparisons Between Fiber-Reinforced and Continuous Skeleton Tungsten-Copper Composite Materials,” J. Mater., 1966, vol. 1, pp. 278–292.
M. Nakamura and J. Gurland, “The Fracture Toughness of WCCo Two Phase Alloys — A Preliminary Model,” Metall. Trans. A, 1980, vol. 11A, pp. 141–146.
J. R. Pickens and J. Gurland, “The Fracture Toughness of WCCo Alloys Measured on Single-Edge Notched Beam Specimens Précracked by Electron Discharge Machining,” Mater. Sci. Eng., 1978, vol. 33, pp. 135–142.
J. Spanoudakis and R. J. Young, “Crack Propagation in a Glass Particle-Filled Epoxy Resin. Part 1. Effect of Particle Volume Fraction and Size,” J. Mater. Sci., 1984, vol. 19, pp. 473–486.
D. V. Edmonds and P. N. Jones, “Interfacial Embrittlement in Liquid-Phase Sintered Tungsten Heavy Alloys,” Metall. Trans. A, 1979, vol. 10A, pp. 289–295.
T. R. Moules and C. A. Calow, “Studies on the Activation-Sintering of Iron Powder,” Powder Met., 1972, vol. 15, pp. 55–66.
J. Spandoukakis and R. J. Young, “Crack Propagation in a Glass Particle-Filled Epoxy Resin. Part 2. Effect of Particle-Matrix Adhesion,” J. Mater. Sci., 1984, vol. 19, pp. 487–496.
C. Li and R. M. German, “The Properties of Tungsten Processed by Chemically Activated Sintering,” Metall. Trans. A, 1983, vol. 14A, pp. 2031–2041.
K. S. Churn and R. M. German, “Fracture Behavior of W-Ni-Fe Heavy Alloys,” Metall. Trans. A, 1984, vol. 15A, pp. 331–338.
L. Albano-Muller, F. Thummler, and G. Zapf, “High-Strength Sintered Iron-Base Alloys by Using Transition Metal Carbides,” Powder Met., 1973, vol. 16, pp. 236–256.
J. L. Chermant and F. Osterstock, “Elastic and Plastic Characteristics of WC-Co Composite Materials,” Powder Met. Inter., 1979, vol. 11, pp. 106–109.
J. L. Chermant, A. Deschanvres, and F. Osterstock, “Factors Influencing the Rupture Stress of Hardmetals,” Powder Met., 1977, vol. 20, pp. 63–69.
J. L. Chermant, M. Coster, G. Hautier, and P. Schaufelberger, “Statistical Analysis of the Behaviour of Cemented Carbides under High Pressure,” Powder Met., 1974, vol. 17, pp. 85–102.
T. Zhenyao, “A New Statistical Relation Between the Strength and the Microstructural Parameters,” Mater. Sci. Eng., 1982, vol. 56, pp. 73–85.
J. Lorenz, J. Weiss, and G. Petzow, “Dense Silicon Nitride Alloys: Phase Relations and Consolidation, Microstructure and Properties,” Advances in Powder Technology, G. Y. Chin (ed.), American Society for Metals, Metals Park, OH, 1982, pp. 289–308.
E. A. Almond, “Deformation Characteristics and Mechanical Properties of Hardmetals,” Science of Hard Materials, R. K. Viswanadham, D. J. Rowcliffe and J. Gurland (eds.), Plenum Press, New York, NY, 1983, pp. 517–557.
S. Amberg and H. Doxner, “Porosity in Cemented Carbides,” Powder Met., 1977, vol. 20, pp. 1–10.
C. Chatfield, “Comments on Microstructure and the Transverse Rupture Strength of Cemented Carbides,” Inter. J. Refractory Hard Met., 1985, vol. 4, pp. 48.
P. B. Anderson, “Hartmetalle erhohter Zahigkeit,” Planseeber. Pulvermet., 1967, vol. 15, pp. 180–186.
L. LeRoux, “Microstructure and Transverse Rupture Strength of Cemented Carbides,” Inter. J. Refract. Hard Met., 1984, vol. 3, pp. 99–100.
U. Engel and H. Hubner, “Strength Improvement of Cemented Carbides by Hot Isostatic Pressing (HIP),” J. Mater. Sci., 1978, vol. 13, pp. 2003–2012.
S. Amberg, E. A. Nylander, and B. Uhrenius, “The Influence of Hot Isostatic Pressing on the Porosity of Cemented Carbide,” Powder Met. Inter., 1974, vol. 6, pp. 178–180.
J. L. Chermant and F. Osterstock, “Fracture Toughness and Fracture of WCCo Composites,” J. Mater. Sci., 1976, vol. 11, pp. 1939–1951.
R. M. German and L. L. Bourguignon, “Analysis of High Tungsten Content Heavy Alloys,” Powder Metallurgy in Defense Technology, vol. 6, C. L. Freeby and W. J. Ullrich (eds.), Metal Powder Industries Federation, Princeton, NJ, 1985, pp. 117–131.
F. Osterstock, “Impact Behaviour of Tungsten Carbide-Cobalt Alloys,” Inter. J. Refractory Hard Metals, 1983, vol. 2, pp. 116–120.
F. E. Sczerzenie and H. C. Rogers, “Hydrogen Embrittlement of Tungsten Base Heavy Alloys,” Hydrogen in Metals, I. M. Bernstein and A. W. Thompson (eds.), American Society for Metals, Metals Park, OH, 1974, pp. 645–655.
S. B. Luyckx, “Role of Inclusions in the Fracture Initiation Process in WC-Co Alloys,” Acta Met., 1975, vol. 23, pp. 109–115.
C. J. Li and R. M. German, “Enhanced Sintering of Tungsten — Phase Equilibria Effects on Properties,” Inter. J. Powder Met. Powder Tech., 1984, vol. 20, pp. 149–162.
B. C. Muddle, “Interphase Boundary Precipitation in Liquid Phase Sintered W-Ni-Fe and W-Ni-Cu Alloys,” Metall. Trans. A, 1984, vol. 15A, pp. 1089–1098.
B. C. Muddle and D. V. Edmonds, “Interfacial Segregation and Embrittlement in Liquid Phase Sintered Tungsten Alloys,” Metal Sci., 1983, vol. 17, pp. 209–218.
K. S. Churn and D. N. Yoon, “Pore Formation and its Effect on Mechanical Properties in W-Ni-Fe Heavy Alloy,” Powder Met., 1979, vol. 22, pp. 175–178.
L. Ekbom, “Microstructural Study of the Deformation and Fracture Behavior of a Sintered Tungsten-Base Composite,” Modern Developments in Powder Metallurgy, vol. 14, H. H. Hausner, H. W. Antes and G. D. Smith (eds.), Metal Powder Industries Federation, Princeton, NJ, 1981, pp. 177–188.
C. T. Peters, “The Relationship Between Palmqvist Indentation Toughness and Bulk Fracture Toughness for Some WC-Co Cemented Carbides,” J. Mater. Sci., 1979, vol. 14, pp. 1619–1623.
K. S. Cherniavsky, “Stereology of Cemented Carbides,” Sci. Sintering, 1982, vol. 14, pp. 1–12.
J. E. Marion, A. G. Evans, M. D. Drory, and D. R. Clarke, “High Temperature Failure Initiation in Liquid Phase Sintered Materials,” Acta Met., 1983, vol. 31, pp. 1445–1457.
R. L. Tsai and R. Raj, “Creep Fracture in Ceramics Containing Small Amounts of a Liquid Phase,” Acta Met., 1982, vol. 30, pp. 1043–1058.
P. Lindskog, “The Effect of Phosphorus Additions on the Tensile, Fatigue, and Impact Strength of Sintered Steels Based on Sponge Iron,” Powder Met., 1973, vol. 16, pp. 374–386.
R. L. Hodson and N. M. Parikh, “Cemented Carbides with High-Melting Binders II: Ternary Equilibrium Systems,” Inter. J. Powder Met., 1967, vol. 3, no.3, pp. 31–40.
K. S. Hwang and R. M. German, “High Density Ferrous Components by Activated Sintering,” Processing of Metal and Ceramic Powders, R. M. German and K. W. Lay (eds.), The Metallurgical Society, Warrendale, PA, 1982, pp. 295–310.
R. M. German and B. H. Rabin, “Enhanced Sintering Through Second Phase Additions,” Powder Met., 1985, vol. 28, pp. 7–12.
T. Sadahiro and S. Takatsu, “A New Precracking Method for Fracture Toughness Testing of Cemented Carbides,” Modern Developments in Powder Metallurgy, vol. 14, H. H. Hausner, H. W. Antes and G. D. Smith (eds.), Metal Powder Industries Federation, Princeton, NJ, 1981, pp. 561–572.
S. Singh, “Palmqvist Toughness of Cemented Carbide Alloys,” Inter. J. Refractory Hard Met., 1985, vol. 4, pp. 27–30.
P. Schwarzkopf and R. Kieffer, Cemented Carbides, MacMillan Co., New York, NY, 1960.
M. D. Thouless and A. G. Evans, “Nucleation of Cavities During Creep of Liquid Phase Sintered Materials,” J. Amer. Ceramic Soc., 1984, vol. 67, pp. 721–727.
J. T. Smith and J. D. Wood, “Elevated Temperature Compressive Creep Behavior of Tungsten Carbide-Cobalt Alloys,” Acta Met., 1968, vol. 16, pp. 1219–1226.
A. A. Fahmy and A. N. Ragai, “Thermal Expansion Behavior of Two-Phase Solids,” J. Appl. Phys., 1970, vol. 41, pp. 5108–5111.
K. Wakashima, M. Otsuka, and S. Umekawa, “Thermal Expansions of Heterogeneous Solids Containing Aligned Ellipsoidal Inclusions,” J. Composite Mater., 1974, vol. 8, pp. 391–404.
L. I. Tuchinskii, “Thermal Expansion of Composites with a Skeletal Structure,” Soviet Powder Met. Metal Ceram., 1983, vol. 22, pp. 659–664.
S. J. Feltham, B. Yates, and R. J. Martin, “The Thermal Expansion of Particulate-Reinforced Composites,” J. Mater. Sci., 1982, vol. 17, pp. 2309–2323.
S. Nazare, G. Ondracek, and F. Thummler, “Relations Between Stereometric Microstructure and Properties of Cermets and Porous Materials,” Modern Developments in Powder Metallurgy, vol. 5, H. H. Hausner (ed.), Plenum Press, New York, NY, 1971, pp. 171–186.
N. C. Kothari, “Factors Affecting Tungsten-Copper and Tungsten-Silver Electrical Contact Materials,” Powder Met. inter., 1982, vol. 14, pp. 139–159.
G. H. Gessinger and K. N. Melton, “Burn-off Behaviour of W-Cu Contact Materials in an Electric Arc,” Powder Met. Inter., 1977, vol. 9, pp. 67–72.
G.J. Witter and W. R. Warke, “A Correlation of Material Toughness, Thermal Shock Resistance, and Microstructure of High Tungsten, Silver-Tungsten Composite Materials,” IEEE Trans. Parts Hybrids Packaging, 1975, vol. 11, pp. 21–29.
A. Ball and A. W. Paterson, “Microstructural Design of Erosion Resistant Hard Materials,” Proceedings Eleventh international Plansee Seminar, vol. 2, H. Bildstein and H. M. Ortner (eds.), Metallwerk Plansee, Reutte, Austria, 1985, pp. 377–391.
J. Larsen-Basse, “Effect of Composition, Microstructure, and Service Conditions on the Wear of Cemented Carbides,” J. Metals, 1983, vol. 35, no.11, pp. 35–42.
J. Larsen-Basse, “Wear of Hard-Metals in Rock Drilling: A Survey of the Literature,” Powder Met., 1973, vol. 16, pp. 1–32.
Y. G. Bogatin, “Effect of Phase and Structural Transformations Occurring During Liquid-Phase Sintering on the Magnetic Properties of Samarium Cobalt Magnets,” Soviet Powder Met. Metal Ceram., 1978, vol. 17, pp. 393–398.
G. H. Gessinger and E. De Lamotte, “Der Sintermechanismus von Samarium-Kobalt-Legierungen,” I. Metallkde., 1973, vol. 64, pp. 771–775.
P. J. Jorgensen and R. W. Bartlett, “Liquid-Phase Sintering of SmCo5,” J. Appl. Phys., 1973, vol. 44, pp. 2876–2880.
P. J. Jorgensen and R. W. Bartlett, “Solid-Phase Sintering of SmCo5,” J. Less-Common Metals, 1974, vol. 37, pp. 205–212.
G. Jangg, M. Drozda, H. Danninger, H. Wibbeler, and W. Schatt, “Sintering Behavior, Mechanical and Magnetic Properties of Sintered Fe-Si Materials,” Inter. J. Powder Met. Powder Tech., 1984, vol. 20, pp. 287–300.
G. Jangg, M. Drozda, H. Danninger, and G. Eder, “Magnetic Properties of Sintered Fe-P Materials,” Powder Met. Inter., 1984, vol. 16, pp. 264–267.
F. Frehn and W. Hotop, “Effect of Small Boron Contents on the Properties of Compacts Prepared by Vacuum Sintering,” Symposium on Powder Metallurgy, Special Report 58, Iron and Steel Institute, London, UK, 1956, pp. 137–143.
K. H. Moyer, “The Effects of Phosphorus on the Properties of Iron Alloys for Magnetic Applications,” Prog. Powder Met., 1981, vol. 37, pp. 81–98.
W. Rutkowski and B. Weglinski, “The Influence of Silicon Additions on the Magnetic Properties of Iron Sinters,” Planseeber. Pulvermetall., 1979, vol. 27, pp. 162–177.
W. Rutkowski and B. Weglinski, “Phosphorus and its Influence on Properties of Magnetically Soft Sinters,” Planseeber. Pulvermetall., 1980, vol. 28, pp. 39–55.
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German, R.M. (1985). Properties of Liquid Phase Sintered Materials. In: Liquid Phase Sintering. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-3599-1_9
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