Table 1.

Intermetallic phases of copper and aluminum and their physical properties [31,32].

Phase	Chemical Composition	Cu Mass in %	Al Mass in %	Hardness in HV	Specific Resistivity in µΩ cm	ΔG in kJ mol−1
Cu	Cu	100	0	100	1.8	-
γ1	Al4Cu9	80	20	1050	14.2	−21.69
δ	Al2Cu3	78	22	180	13.4	−20.67
ζ2	Al3Cu4	75	25	624	12.2	−20.64
η2	AlCu	70	30	648	11.4	−19.92
Θ	Al2Cu	55	45	413	8.0	−13.05
Al	Al	0	100	60	2.9	-