MARQUES, PEDRO ENRIQUE MONFORTE BRANDAO ; ALENCASTRO, FELIPE SAMPAIO ; SIMÃO, RENATA ANTOUN ; ROCHA, ADRIANA DA CUNHA .
Resumo: THIS WORK PROPOSES METHODOLOGY TO DESIGN AND SYNTHESIZE A HIGH ENTROPY ALLOY (HEA) WITH REFRACTORY PROPERTIES IN THE FORM OF A PROTECTIVE THIN FILM. THE GOAL IS TO DEPOSIT A FILM WITH CHARACTERISTIC MICROSTRUCTURE OF HEA, WITH THE PRESENCE OF A DISORDERED SOLID SOLUTION MATRIX. TO PERFORM THE ALLOY DESIGN, A MINIMUM SET OF TARGET PROPERTIES OF INTEREST FOR THE ALLOY WAS DEFINED, IN THIS CASE THE YIELD STRENGTH, OXIDATION RESISTANCE AND RAW MATERIAL COST. FROM THESE PROPERTIES, SIX CONSTITUENT ELEMENTS WERE CHOSEN. AN ARTIFICIAL INTELLIGENCE MODEL WAS DEVELOPED TO DETERMINE THE OPTIMAL CHEMICAL COMPOSITION FROM PUBLIC DATA MINED FROM THE LITERATURE. ONCE DESIGNED, THE ALLOY WAS DEPOSITED OVER A SUBSTRATE, BY MAGNETRON SPUTTERING TECHNIQUE, USING POWER BALANCING TO ACHIEVE THE OPTIMAL COMPOSITION ON THREE CHOSEN TARGETS. TWO SAMPLES WERE DEPOSITED, ONE WITH HOMOGENEOUS DEPOSITION, AND ANOTHER WITH STATIC SAMPLE CARRIER. CHARACTERIZATION OF THE SAMPLES CONCLUDED THAT A CHEMICAL AND MORPHOLOGICAL HOMOGENEOUS SINGLE-PHASE BCC MICROSTRUCTURE WAS ACHIEVED, AND REVEALED THE PRESENCE OF THE HIGH MIXING ENTROPY AND SEVERE LATTICE DISTORTION HEA’S FUNDAMENTAL EFFECT.
