| Grant number: | 19/18460-4 |
| Support Opportunities: | Regular Research Grants |
| Start date: | January 01, 2020 |
| End date: | October 31, 2025 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Condensed Matter Physics |
| Agreement: | CONFAP - National Council of State Research Support Foundations |
| Principal Investigator: | Fernando Alvarez |
| Grantee: | Fernando Alvarez |
| Host Institution: | Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil |
| City of the host institution: | Campinas |
| Associated researchers: | Alexandre Fassini Michels ; Bruna Louise Perotti ; Carla Daniela Boeira ; Felipe Cemin ; Francisco das Chagas Marques ; Jennifer Stefani Weber ; Leonardo Mathias Leidens ; Mawin Javier Martinez Jimenez ; Nayrim Brizuela Guerra ; Saron Rosy Sales de Mello ; Vinícius Pavinato |
Abstract
The increasing demand for advanced materials combining unique and unusual properties has encouraged the study of new high entropy compounds, such as high entropy alloys (HEA) and ceramics (HEC). The synthesis of these materials was stimulated by the advent of recent computational modeling techniques that consider entropy during material design, which is a fundamental key to explain the stabilization of complex, multicomponent compounds of technological importance. Therefore, the challenge of this proposal focuses on designing and synthetizing high entropy alloys (HEA) at small scales, i.e., as thin and ultrathin films, as well as advancing the fundamental physical knowledge on this new type of materials (scientific goal) and also evaluating the thermo-mechanical and tribological behaviors (technological goal). We expect to achieve these goals by using computational modeling and thermodynamic analysis, followed by the materials synthesis and characterization, understanding of the physical fundaments leading to the desired final properties and the measurement of friction coefficients of tribological systems. The use of plasma spectroscopy in real time during the synthesis of the HEA samples will allow us to control the precursors of the films looking for gaining understanding on the physical fundaments involved in the film growth. In addition to the tribological properties, studies of thermo-mechanical properties will be carried out. We will investigate the mechanical stress as a function of temperature, coefficient of thermal expansion, Young's modulus and Poisson's ratio using methodology developed in our laboratories. These properties are important for applications in device manufacturing. (AU)
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