Fe+ Cu=FeCu

It seems you are presenting a chemical reaction. However, the equation you've written (Fe + Cu = FeCu) is not correctly balanced, and in standard conditions, iron (Fe) and copper (Cu) do not combine to form an intermetallic compound FeCu directly through simple combination.

If you're looking for information on intermetallic compounds formed between iron and copper, one example is the compound FeCu (iron-copper), which can occur under specific conditions, but generally requires more complex processing or specific atmospheres to form.

If you have a specific question about this reaction, intermetallic compounds, or related topics, please let me know!