首页|Novel high entropy intermetallic compounds: Synthesis and detonation spraying
Novel high entropy intermetallic compounds: Synthesis and detonation spraying
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NSTL
Elsevier
(NiCoFeCuMn)Zn-3 and (NbTaVNiTiFe)Al-3 high entropy intermetallic compound (HEIC) powders are fabricated by induction melting followed by ball milling. The fabricated (NiCoFeCuMn)Zn-3 HEIC powder possesses a single gamma-brass D8(2)-type structure, while (NbTaVNiTiFe)Al-3 exhibits D0(22) HEIC phase along with Ni4Ti3 and FeNi intermetallic inclusions. The microstructure of (NiCoFeCuMn)Zn-3 HEIC powder consists of a homogenous distribution of constituent elements. In the microstructure of (NbTaVNiTiFe)Al3, (TaNb)-rich and (FeNi)-rich regions are formed. A modified electronegativity parameter is proposed as a new indicator to design single high-entropy phases in ordered (A1A2A3 ... An)B-m systems. The application of the prepared HEICs as precursor powders for detonation spraying (DS) is further examined. The results indicate that both powders can exhibit sufficient thermal stability during DS. The coatings exhibit sound bonding with substrate, and consist of lamellar microstructure with low porosities. It is predicted that HEICs, as a promising class of high entropy materials, are interesting candidates for a wide range of applications from coatings to catalysts.
High entropy intermetallic compoundsMicrostructureDetonation sprayingMicrohardnessSINGLE-PHASEALLOYS
Moghaddam, Ahmad Ostovari、Abdollahzadeh, Amin、Samodurova, Marina、Shaburova, Nataliya、Mikhailov, Dmitry、Fereidonnejad, Rahele、Zhivulin, Vladimir、Trofimov, Evgeny
NSTL
Elsevier
