Umphezulu we-aluminium alloy unefilimu ye-oxide eyenziweyo, enemibala yokwenza ifilimu edibeneyo. Ifilimu edibeneyo ayinakuchasana kuphela nokugqwala kunye ne-friction, kodwa inokumelana nomlilo othile, ngoko ke yenziwe kumnyango womlilo we-aluminium alloy. Umnyango womlilo unamandla aphezulu e-flexural kunye ne-deformation encinci.