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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.
Notes
* Contribution to a Symposium on “The Role of Powder Metallurgy in Nuclear Technology”, held in London on 16 and 17 November, 1967.