Effect of Mechanical Milling and Cold Pressing on Co Powder

Table 1

XRD data of unmilled free, unmilled cold pressed (CP), 30 h milled-free, 30 h milled CP and 30 h milled CP 400°C-annealed Co powder.

Material condition	Space group and number	Phases	Lattice parameter (Å)
			𝑎	𝑐
Unmilled powder	P63/mmc no. 194	HCP	2.51	4.07
Unmilled CP	P63/mmc no. 194	HCP	2.50	4.06
Milled powder	Fm-3m no. 225	FCC	3.80	—
Milled CP	Fm-3m no. 225	FCC	3.75	—
Milled CP annealed	Fm-3m no. 225	FCC	3.80	—