Summary
1—Data are presented to show the influence of various pressing and sintering conditions upon the process have an important influence upon the final density of compacts sintered to achieve theoretical density. I. this, connection, high compacting pressures, rapid heating rates, and high sintering temperatures exaggerate the effect of evolved gases and promote the formation of large initial pores which are eliminated during continued sintering only with difficulty.
4—A density close to that for the fused alloy (97.5 pct) has been obtained for 50 pct Fe-50 pct C. powder, compacts by providing for the escape of liberated gases before appreciable sintering has occurred.
5—The results of this investigation should prove of interest to powder metallurgists concerned with the production of very high density materials or with the production of parts having a controlled porosity, such as bearings and filters.
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Discussion on this paper, TP 3135E, may be sent, 2 copies, to AIME by Dec. 1, 1951. Manuscript, April 16, 1951; revision, July 12, 1951. Detroit Meeting, October 1951.
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Warren, D., Libsch, J.F. Role of Gases in the Production of High Density Powder Compacts. JOM 3, 774–781 (1951). https://doi.org/10.1007/BF03397371
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DOI: https://doi.org/10.1007/BF03397371