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A MECHANISM FOR THE PRESSURE-SINTERING (HOT PRESSING) OF BERYLLIUM

Jacques Butcher, H. M. Lindsay, J.N. Lowe, V. D. Scott

Open publisher page 4 citations

Abstract

Previous work on the vacuum hot pressing of beryllium powders is reviewed to illustrate the dominant role of powder chemistry in consolidation behaviour. New electron-microscope evidence is advanced to show that oxides are present on the surface of beryllium powder particles but, in contrast, are not found predominantly at the grain boundaries of hot-pressed compacts.Finally, a model is proposed incorporating the macro and micro features of consolidation, which involves sintering of the compact followed by recrystallization.

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What this paper is about

Previous work on the vacuum hot pressing of beryllium powders is reviewed to illustrate the dominant role of powder chemistry in consolidation behaviour. New electron-microscope evidence is advanced to show that oxides are present on the surface of beryllium powder particles but, in contrast, are not found predominantly at the grain boundaries of hot-pressed compacts.Finally, a model is proposed incorporating the macro and micro features of consolidation, which involves sintering of the compact followed by recrystallization.

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Available abstract

Previous work on the vacuum hot pressing of beryllium powders is reviewed to illustrate the dominant role of powder chemistry in consolidation behaviour. New electron-microscope evidence is advanced to show that oxides are present on the surface of beryllium powder particles but, in contrast, are not found predominantly at the grain boundaries of hot-pressed compacts.Finally, a model is proposed incorporating the macro and micro features of consolidation, which involves sintering of the compact followed by recrystallization.

Key concepts: Beryllium, Materials science, Sintering, Recrystallization (geology), Metallurgy, Hot pressing, Consolidation (business), Powder metallurgy

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