No, those are still the Blades of Chaos. Those are just upgraded.
He doesn't get the Blades of Athena until Ares takes them away, and then Athena gives him new ones at the very end of GoW1, after he kills Ares. He continues to use them in GoW2.
His blades in general in my personal opinion are one of the huge draws to this game. By far they are my most favorite weapon ever created for a game.
Giant blades that fly out and are attached to chains? Yes please.