Influence of Boron Additions on Dissipative Properties of Quasicrystalline Al-Cu-Fe Coatings

Influence of boron on mechanical and dissipative properties of quasicrystalline Al-Cu-Fe coatings is studied. As shown, the hardness of coatings based on quasicrystalline Al-Cu-Fe phase under alloying with boron remains practically unchanged, while their fracture toughness slightly increases. At the same time, damping capacity of nanoquasicrystalline coating Al-Cu-Fe-B is found to be essentially lower as compared with that of similar coating without boron. Possible mechanisms of the change in dissipative properties are discussed.