Microstructural Evolution of High-Entropy Intermetallic Compounds during Detonation Spraying

被引：1
作者：
Moghaddam, Ahmad Ostovari [1 ]
Sudarikov, Mikhail [2 ]
Shaburova, Nataliya [1 ]
Polyakova, Marina [2 ,3 ]
Samodurova, Marina [4 ]
Trofimov, Evgeny [1 ]
机构：
[1] South Ural State Univ, Dept Mat Sci, Phys & Chem Properties Mat, 76 Lenin Ave, Chelyabinsk 454080, Russia
[2] South Ural State Univ, Dept Sci & Innovat Act, 76 Lenin Ave, Chelyabinsk 454080, Russia
[3] Nosov Magnitogorsk State Tech Univ, Dept Mat Proc, 38 Lenin Ave, Magnitogorsk 455000, Russia
[4] South Ural State Univ, Dept Informat & Measuring Technol, 76 Lenin Ave, Chelyabinsk 454080, Russia
来源：
METALS | 2024年 / 14卷 / 01期
基金：
俄罗斯科学基金会;
关键词：
high-entropy intermetallic compounds; detonation spraying; microstructure; microhardness; STRENGTH; ALLOYS;
D O I：
10.3390/met14010050
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study aims at investigating the feasibility of depositing quality coatings from various high-entropy intermetallic compounds (HEICs) using detonation spraying (DS). Four different HEIC coatings, namely (NbTaVCrTi)Al-3, (NbTaVNiFe)Al-3, (NbTaVZrHf)Al-3, and (FeNiCoCrMn)(MoCr), were prepared by DS on low alloy steel substrates. The HEIC powders were first prepared by arc melting followed by ball milling and then used as reinforcement particles to deposit HEIC coatings. Elemental segregation was observed for all the as-cast samples. Powders with average particle sizes of about similar to 25 mu m for (NbTaVCrTi)Al-3, similar to 22 mu m for (NbTaVNiFe)Al-3, similar to 34 mu m for (NbTaVZrHf)Al-3, and similar to 18 mu m for (FeNiCoCrMn)(MoCr) were obtained. (NbTaVCrTi)Al-3, (NbTaVNiFe)Al-3, and (NbTaVZrHf)Al-3 HEICs exhibited a nearly single D0(22) (TaAl3 type) structure, while (FeNiCoCrMn)(MoCr) exhibited a single D8(b) (FeCr type) structure. Dense coatings consisted of a lamellar microstructure and sound bonding with the substrate, and low porosity was obtained for all the samples. Crystal structures of the HEIC samples were highly retained during DS, whereas all the samples underwent some degree of oxidation. Microhardness values of 745 HV for (NbTaVCrTi)Al-3, 753 HV for (NbTaVNiFe)Al-3, and 862 HV for (NbTaVZrHf)Al-3 were obtained, which are significantly higher than the microhardness of the substrate (similar to 140 HV). Among all the samples, (FeNiCoCrMn)(MoCr) exhibited the highest microhardness values of about 1047 HV.
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页数：14
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