Influence of Fe-additives on the microstructure and mechanical properties of vacuum copper condensates

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 528; no. 3; pp. 1030 - 1036
• Main Authors: Ustinov, A.I., Skorodzievskii, V.S., Fesiun, O.V., Melnichenko, T.V., Taranenko, V.N., Nekrasov, A.A.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 25-01-2011; Elsevier
• Subjects: Condensates; Condensed matter: structure, mechanical and thermal properties; Copper; Cross-disciplinary physics: materials science; rheology; EBPVD; Exact sciences and technology; Iron; Logarithmic decrement; Materials science; Mechanical and acoustical properties; Mechanical properties; Methods of deposition of films and coatings; film growth and epitaxy; Microhardness; Microstructure; Molecular, atomic, ion, and chemical beam epitaxy; Nanomaterials; Nanostructure; Nanotwins; Physical properties of thin films, nonelectronic; Physics; Structure and morphology; thickness; Substructures; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology; Logarithmic decrement; EBPVD; Nanotwins; Copper; Microhardness; Stacking faults; Mechanical properties; Dynamic loads; Twinning; Substructure; Nanometer scale; Transmission electron microscopy; Domain structure; Transition elements; Iron additions; Microstructure; Electron beam evaporation
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2010.10.067

▶ Hardness of the Cu–Fe condensates is increased with addition of Fe additives (up to 1.7%). ▶ Twin microstructure leads to increase of dissipative properties of Cu–Fe condensates. ▶ Mechanical properties of Cu–Fe condensates depend on twined structure of the condensate.
Investigation of iron additives on mechanical properties of vacuum condensates with nano-twinned substructure of grains at static (microhardness) and dynamic (damping capacity) loads was studied. Cu–Fe vacuum condensates were produced at simultaneous deposition of component vapour phases on substrates under temperature conditions which enable formation of copper condensates with a nano-twinned substructure. It is established that small iron additives (up to 1.7wt.%) lead to a considerable increase of Cu–Fe condensate microhardness. At further increase of iron content in copper right up to 7%, condensate microhardness stays at approximately the same level. Iron influence on dissipative properties of Cu–Fe condensates is manifested in a significant weakening of amplitude dependence of damping level and enhancement of temperature influence on it. Change of mechanical properties of vacuum condensates Cu–Fe at iron addition is associated with its influence on such microstructural characteristics of condensates as twin domain thickness, volume fraction of grains with nano-twinned substructure and their dimensions.