Mixing the immiscible through high-velocity mechanical impacts: an experimental and theoretical study

Autor(es)

Malviya, Kirtiman D. ^[1] ; Oliveira, Eliezer F. ^{[2, 3, 4]} ; Autreto, Pedro A. S. ^{[3, 5]} ; Ajayan, Pulickel M. ^[2] ; Galvao, Douglas S. ^{[3, 4]} ; Tiwary, Chandra S. ^{[2, 6]} ; Chattopadhyay, Kamanio ^[1]

Afiliação do(s) autor(es)

^[1] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka - India

^[2] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 - USA

^[3] Univ Estadual Campinas, Gleb Wataghin Inst Phys, UNICAMP, BR-13083859 Campinas, SP - Brazil

^[4] Univ Estadual Campinas, UNICAMP, CCES, BR-13083859 Campinas, SP - Brazil

^[5] Fed Univ ABC, Ctr Nat Human Sci, Santo Andre, SP - Brazil

^[6] Indian Inst Technol, Met & Mat Engn, Kharagpur 721302, W Bengal - India

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS D-APPLIED PHYSICS; v. 52, n. 44 OCT 30 2019.
• Citações Web of Science: 0

Resumo

In two-component metallic systems, thermodynamic immiscibility leads to phase separation such as in two-phase eutectic compositional alloys. The limit of the immiscibility of component elements under non-equilibrium conditions have been explored, but achieving complete miscibility and formation of single phase microstructures in eutectic alloys would be unprecedented. Here, we report that during the low-temperature ball milling that provides high energy impact, complete mixing of phases can occur in immiscible Ag-Cu eutectic alloys. From combined theoretical and experimental studies, we show that impact can produce solid solutions of Ag-Cu nanoparticles of eutectic composition. Our results show that phase diagrams of low dimensional materials under non-equilibrium conditions remain unexplored and could lead to new alloy microstructures drastically different from their bulk counterparts. (AU)

• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 16/18499-0 - Investigação de propriedades estruturais, mecânicas e funcionais de nanoestruturas de carbono
• Beneficiário: Eliezer Fernando de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado