Enhanced consolidation of ball-milled NbAl intermetallic powders

Mino, Kazuaki; Yoshizawa, Hiroki; Saitoh, Yoshiyuki

doi:10.1016/0921-5093(93)90720-y

Cited by 1 publication

(2 citation statements)

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“…26 In addition, these agglomerates contain a large area of interparticle boundaries which can greatly enhance the sintering kinetics in comparison with powder particles of the same size but with little or no internal grain boundaries, as demonstrated in previous studies on Nb-Al intermetallics. 27 These expectations, however, remain to be confirmed by experiments.…”

Section: Resultsmentioning

confidence: 94%

“…It is anticipated that the green density of the compact from these agglomerates can be relatively high if sufficient pressure is applied during compaction because the broad distribution of the agglomerate size can improve the powder packing density 26 . In addition, these agglomerates contain a large area of interparticle boundaries which can greatly enhance the sintering kinetics in comparison with powder particles of the same size but with little or no internal grain boundaries, as demonstrated in previous studies on Nb–Al intermetallics 27 . These expectations, however, remain to be confirmed by experiments.…”

Section: Resultsmentioning

confidence: 99%

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Crystallite Size Refinement of ZrB₂by High‐Energy Ball Milling

Galán

Ortiz

Guiberteau

et al. 2009

Journal of the American Ceramic Society

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The high‐energy ball milling behavior of a commercially available ZrB2 powder was studied by X‐ray diffractometry and transmission electron microscopy. It is shown that ball milling is very effective in obtaining nanocrystalline ZrB2 powder. Further, the crystallite size refinement occurs through repeated brittle fracture, with the final crystal size being limited by a combination of the fracture strength of particles and the compressive stress induced by collision of balls. With this mechanism, the crystallite size first decreases rapidly, then gradually, and finally approaches to an asymptotic limit as the ball‐milling time increases. Additionally, the higher the ball‐to‐powder weight ratio, the faster the decrease in the crystallite size and the smaller the ultimate crystallite size.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%