Milling time

Number of steel balls

Diameter of steel balls, mm

Mass ratio of powder/balls

The total weight of the balls, g

15 min

8

1

1:6

65.71

30 min

8

1

1:6

65.71

1 h

17

0.5

1:5

58.05

3 h

17

0.5

1:5

58.05

5 h

36

0.3

1:3

34.52

6 h

36

0.3

1:3

34.52

7 h

36

0.3

1:3

34.52

8 h and 25 min

(2 + 4 + 3 + 7)

1 + 0.8 + 0.5 + 0.3

1:4

41.90