The structure of porous nickel plaques produced by the following routes has been examined using scanning electron microscopy: (a) pressure-less sintering of nickel powder; (b) slurry sintering of powder; (c) roll-compaction and sintering of powder; (d) pyrolysis of cloth impregnated with nickel chloride. The observations show that measurements of pore-size distribution with a mercury porosimeter can be misleading, and also reveal the existence of fine closed porosity in plaques made from impregnated cloth. The relation of the observed porosity characteristics and inter-particle bond diameters to the mechanical and electrical properties of the plaques is discussed.
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References
1.
JuuselaJ., RekolaT., TikkanenM. H., and YlasaariS., Internat. J. Powder Met., 1969, 5, 91.
2.
WilliamsN. J., AshcroftT. B., and TurnerT. S., ‘Power Sources 3,’ Proc. 7th International Symposium*IBrighton, 1970, pp. 149-167.
3.
TraceyV. A. and WilliamsN. J., Eleetrochem. Teehnol., 1965, 3, 17.
