Optimisation of high energy ball milling parameters to
Fig 2a–d show the secondary electron micrographs of the ball milled Alloy 617 06 WtY 2 O 3 Alloy 617–06 WtY 2 O 3 powder and 2 wt of stearic acid PCA using 500 1000 1500 and 2000 rpm for 30 min Fig 2a shows that the powder milled at 500 rpm produces lamellar flakes typical to the initial stage of a mechanical milling process