P> The child question was born. Which alloy has a melting temperature higher than the maximum melting temperature of pure alloy components?

What is question? Does anyone not know that if you start with the melting of nickel (the melting temperature of 1454) and gradually insert aluminum into it (the melting temperature of 660), the alloy will harden? I think everyone who has ever made the alloy of nickel with aluminum has learned this hard.