Table 2.

Phase composition of the as-received powder and the aluminum foams thermally processed for 3 h at 750 °C in air and at 750–900 °C in Ar.

Sample	α-Al2O3, wt.%	γ-Al2O3, wt.%
Al powder	-	-
Air 750 °C	20.2	2.4
Ar 750 °C	-	4.6
Ar 800 °C	-	3.8
Ar 850 °C	1.5	4.3
Ar 900 °C (shrink part of the foam)	28.8	7.4