Study and synthesis of High Entropy Alloy (HEA) thin films

• Grant number: 18/24461-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2019
• End date: April 30, 2022
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Fernando Alvarez
• Grantee: Felipe Cemin
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

The increasing demand for advanced materials combining unique and unusual properties has encouraged the study of new high entropy compounds, such as metallic oxides and High Entropy Alloys (HEA) containing more than four elements. The synthesis of these materials was stimulated by the advent of recent computational modeling techniques considering entropy during material design, which is a fundamental key to explain the stabilization of complex, multicomponent compounds of technological importance. The originality of these new materials is to combine the properties of the individual compounds with the thermodynamic stabilizing effect of the entropy. Therefore, the challenge of this proposal focuses on designing and synthetizing high entropy compounds at small scales, i.e., as thin and ultrathin films, as well as advancing in the elementary physical knowledge on this new type of materials. We expect to achieve these goals by using computational modeling and thermodynamic analysis, followed by the materials synthesis, characterization and understanding of the physical fundaments leading to the desired final properties. The team proposing this project has extensive experience in synthesis and characterization of thin films, including metallic oxides and nanostructured thin film alloys, which will allow us to start studying more complex systems of HEA containing elements such as Ti, Cr, Ni, C, Al, N, H. We emphasize that the study of HEA is a pioneer proposal in Brazil and it will allow us to reach a prominent place in the area of new materials, since they present important theoretical challenges in fundamental and experimental physical knowledge with application in several areas, such as Optical, Mechanical, tribological and special coatings. (AU)

Scientific publications

(10)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PEROTTI, BRUNA L.; CAMMARATA, ANTONIO; CEMIN, FELIPE; SALES DE MELLO, SARON R.; LEIDENS, LEONARDO M.; ECHEVERRIGARAY, FERNANDO G.; MINEA, TIBERIU; ALVAREZ, FERNANDO; MICHELS, ALEXANDRE F.; POLCAR, TOMAS; et al. Phototribology: Control of Friction by Light. ACS APPLIED MATERIALS & INTERFACES, v. 13, n. 36, p. 43746-43754, SEP 15 2021. (19/00757-0, 18/24461-0)

ZANATTA, A. R.; CEMIN, F.; ECHEVERRIGARAY, F. G.; ALVAREZ, F.. On the relationship between the Raman scattering features and the Ti-related chemical states of TixOyNz films. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, v. 14, p. 864-870, SEP-OCT 2021. (19/18460-4, 18/24461-0, 19/00757-0)

LITORIA, ADITYA K.; JOSHI, MANOJ D.; ANTUNES, V.; SINGH, DIGVIJAY; FIGUEROA, CARLOS A.; ALVAREZ, F.; HOSMANI, SANTOSH S.. The response of boronized 34CrAlMo5-10 (EN41B) steel to nanoindentation, oxidation, and wear. PHILOSOPHICAL MAGAZINE, v. 101, n. 7, p. 777-818, APR 3 2021. (12/10127-5, 18/24461-0, 19/00757-0)

BOEIRA, CARLA D.; CEMIN, FELIPE; LEIDENS, LEONARDO M.; WEBER, JENNIFER S.; MICHELS, ALEXANDRE F.; AGUZZOLI, CESAR; SERRA, RICARDO; EVARISTO, MANUEL; FERNANDES, FILIPE; ALVAREZ, FERNANDO; et al. Adhesion of Amorphous Carbon Nanofilms on Ferrous Alloy Substrates Using a Nanoscale Silicon Interlayer: Implications for Solid-State Lubrication. ACS APPLIED NANO MATERIALS, v. 5, n. 3, p. 10-pg., 2022-03-25. (18/24461-0, 19/18460-4)

SCOCA, DIEGO L. S.; CEMIN, FELIPE; BILMES, SARA A.; FIGUEROA, CARLOS A.; ZANATTA, ANTONIO R.; ALVAREZ, FERNANDO. Role of Rare Earth Elements and Entropy on the Anatase-To-Rutile Phase Transformation of TiO2 Thin Films Deposited by Ion Beam Sputtering. ACS OMEGA, v. 5, n. 43, p. 28027-28036, NOV 3 2020. (12/10127-5, 18/24461-0, 19/18460-4)

ZANATTA, A. R.; ECHEVERRIGARAY, F. G.; CEMIN, F.; ALVAREZ, F.. radual and selective achievement of Rutile-TiO2 by thermal annealing amorphous TixOyNz film. Journal of Non-Crystalline Solids, v. 579, MAR 1 2022. (18/24461-0, 19/00757-0, 19/18460-4)

ANTUNES, VINICIUS G.; FIGUEROA, CARLOS A.; ALVAREZ, FERNANDO. Chemisorption Competition between H2O and H-2 for Sites on the Si Surface under Xe+ Ion Bombardment: An XPS Study. Langmuir, v. 38, n. 6, p. 8-pg., 2022-02-15. (12/10127-5, 19/00757-0, 19/18460-4, 18/24461-0)

CEMIN, FELIPE; DE MELLO, SARON R. S.; FIGUEROA, CARLOS A.; ALVAREZ, FERNANDO. Influence of substrate bias and temperature on the crystallization of metallic NbTaTiVZr high-entropy alloy thin films. SURFACE & COATINGS TECHNOLOGY, v. 421, SEP 15 2020. (18/24461-0, 19/18460-4)

CEMIN, FELIPE; ARTICO, LEONARDO LUIS; PIROLI, VANESSA; YUNES, JOSE ANDRES; FIGUEROA, CARLOS ALEJANDRO; ALVAREZ, FERNANDO. Superior in vitro biocompatibility in NbTaTiVZr(O) high-entropy metallic glass coatings for biomedical applications. Applied Surface Science, v. 596, p. 11-pg., 2022-09-15. (19/18460-4, 19/04943-3, 18/24461-0)

CEMIN, FELIPE; JIMENEZ, MAWIN J. M.; LEIDENS, LEONARDO M.; FIGUEROA, CARLOS A.; ALVAREZ, FERNANDO. A thermodynamic study on phase formation and thermal stability of AlSiTaTiZr high -entropy alloy thin films. Journal of Alloys and Compounds, v. 838, OCT 15 2020. (19/18460-4, 18/24461-0)