{"title":"(CoCrFeMn)1-xNix高熵合金涂层在压裂泵阀上的原子侵蚀行为及影响机制","authors":"Yunhai Liu, Jiawei Xie, Benteng Che","doi":"10.1021/acs.langmuir.4c03092","DOIUrl":null,"url":null,"abstract":"The CoCrFeMnNi high-entropy alloy is widely regarded as a highly promising coating for enhancing the erosion resistance of fracturing pump valves, owing to its outstanding overall properties. This study employs molecular dynamics simulations to compare and analyze the wear and erosion resistance mechanisms of (CoCrFeMn)<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub> coatings with varying Ni ratios (0.2, 0.4, 0.6, 0.8) under nanoindentation, scratch, and impact conditions at a microscopic scale. The findings indicate that as the proportion of Ni increases under the three simulation conditions, the coating exhibits more dislocation locks, an HCP phase structure, and shear bands. These factors collectively enhance the material’s surface hardness, wear resistance, and plastic recovery. Nonetheless, this is not universally applicable. When the indentation and scratch depth are greater than 20 Å, the (CoCrFeMn)<sub>0.4</sub>Ni<sub>0.6</sub> coating benefits from robust metal bonds and a stable lattice structure, leading to fewer wear atoms and subsurface defects, thus exhibiting superior erosion resistance. These conclusions serve as a theoretical foundation for the selection of (CoCrFeMn)<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub> coatings in practical fracturing operations.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"7 1","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Atomic Erosion Behavior and Influence Mechanism of (CoCrFeMn)1–xNix High-Entropy Alloy Coating on Fracturing Pump Valves During Stimulation Operation\",\"authors\":\"Yunhai Liu, Jiawei Xie, Benteng Che\",\"doi\":\"10.1021/acs.langmuir.4c03092\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The CoCrFeMnNi high-entropy alloy is widely regarded as a highly promising coating for enhancing the erosion resistance of fracturing pump valves, owing to its outstanding overall properties. This study employs molecular dynamics simulations to compare and analyze the wear and erosion resistance mechanisms of (CoCrFeMn)<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub> coatings with varying Ni ratios (0.2, 0.4, 0.6, 0.8) under nanoindentation, scratch, and impact conditions at a microscopic scale. The findings indicate that as the proportion of Ni increases under the three simulation conditions, the coating exhibits more dislocation locks, an HCP phase structure, and shear bands. These factors collectively enhance the material’s surface hardness, wear resistance, and plastic recovery. Nonetheless, this is not universally applicable. When the indentation and scratch depth are greater than 20 Å, the (CoCrFeMn)<sub>0.4</sub>Ni<sub>0.6</sub> coating benefits from robust metal bonds and a stable lattice structure, leading to fewer wear atoms and subsurface defects, thus exhibiting superior erosion resistance. These conclusions serve as a theoretical foundation for the selection of (CoCrFeMn)<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub> coatings in practical fracturing operations.\",\"PeriodicalId\":50,\"journal\":{\"name\":\"Langmuir\",\"volume\":\"7 1\",\"pages\":\"\"},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2024-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Langmuir\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1021/acs.langmuir.4c03092\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Langmuir","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.langmuir.4c03092","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Atomic Erosion Behavior and Influence Mechanism of (CoCrFeMn)1–xNix High-Entropy Alloy Coating on Fracturing Pump Valves During Stimulation Operation
The CoCrFeMnNi high-entropy alloy is widely regarded as a highly promising coating for enhancing the erosion resistance of fracturing pump valves, owing to its outstanding overall properties. This study employs molecular dynamics simulations to compare and analyze the wear and erosion resistance mechanisms of (CoCrFeMn)1–xNix coatings with varying Ni ratios (0.2, 0.4, 0.6, 0.8) under nanoindentation, scratch, and impact conditions at a microscopic scale. The findings indicate that as the proportion of Ni increases under the three simulation conditions, the coating exhibits more dislocation locks, an HCP phase structure, and shear bands. These factors collectively enhance the material’s surface hardness, wear resistance, and plastic recovery. Nonetheless, this is not universally applicable. When the indentation and scratch depth are greater than 20 Å, the (CoCrFeMn)0.4Ni0.6 coating benefits from robust metal bonds and a stable lattice structure, leading to fewer wear atoms and subsurface defects, thus exhibiting superior erosion resistance. These conclusions serve as a theoretical foundation for the selection of (CoCrFeMn)1–xNix coatings in practical fracturing operations.
期刊介绍:
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).