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- W2332765391 abstract "Cylindrical compacts, φ10×h10 mm, for the size measurement and cubic compacts, 10 mm in size, for the dilatometry were formed of an electrolytic iron powder by die-wall lubricating alone, or by admixing 0.3-1.5 wt% of zinc-stearate.During pressing at 200-800 MPa the diameters of the cylindrical compacts and the die-cavity were larger than the original diameter of die-cavity size by 0.01-0.07%. The ejection of compact from the die was accompanied by some radial spring-back in the compact; that is, some 0.04-0.17% of expansion in comparison with the original die size.During de-waxing at 600°C (873K) for 30 min and sintering at 1100°C (1373K) for 60 min in dissociated ammonia, the compacts expanded in the radial direction only when they contained zinc-stearate and were heated rapidly at the rate of several hundred degrees per minute. While those compacted by die-wall lubricating alone, and/or heated slowly at l0°C/min exhibited some shrinkage almost of the same order as the expansion by the spring-back. No correlation, however, was found between the expansion and the shrinkage.On the dilatometer, the compacts were heated slowly at 10°C/min in hydrogen. Some of the compacts containing zinc-stearate, expanded in the lateral direction and shrank in the pressing direction simultaneously during the early stage of de-waxing." @default.
- W2332765391 created "2016-06-24" @default.
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- W2332765391 date "1986-01-01" @default.
- W2332765391 modified "2023-09-25" @default.
- W2332765391 title "Dimensional change of iron powder compacts in lateral direction during compacting, de-waxing and sintering." @default.
- W2332765391 doi "https://doi.org/10.2497/jjspm.33.361" @default.
- W2332765391 hasPublicationYear "1986" @default.
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