X RAY DIFFRACTION STUDY OF W B ELEMENTAL POWDER
The vessel and balls used for milling were made of sintered WC Co material A set of 10 balls of 10 mm in diameter and 4 balls of 12 mm in diameter were used The weight ratio of balls to the amount of milled samples was kept constant and equal to about 20 1 After definite time intervals during milling a small amount of powder