Table 2.

The vacancy formation energies of W − M co-doping Al₃Ti when an Al vacancy forms at V₁ site (${\mathrm{E}}_{{\mathrm{V}}_1}$) or V₂ site (${\mathrm{E}}_{{\mathrm{V}}_2}$) under both Al-rich and Ti-rich environment.

	${\mathrm{E}}_{{\mathrm{V}}_1}$(eV)		${\mathrm{E}}_{{\mathrm{V}}_2}$(eV)
	Al-rich	Ti-rich	Al-rich	Ti-rich
W-C	2.00	1.47	−0.08	−0.61
W-Si	1.15	0.62	−0.07	−0.59
W-Ge	0.95	0.43	−0.14	−0.67
W-Sn	0.42	−0.11	−0.41	−0.94
W-Pb	−0.59	−1.11	−0.59	−1.05