{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,3]],"date-time":"2026-03-03T23:26:14Z","timestamp":1772580374787,"version":"3.50.1"},"reference-count":49,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2024,1,10]],"date-time":"2024-01-10T00:00:00Z","timestamp":1704844800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["52303392"],"award-info":[{"award-number":["52303392"]}]},{"name":"National Natural Science Foundation of China","award":["2020JC-50"],"award-info":[{"award-number":["2020JC-50"]}]},{"name":"National Natural Science Foundation of China","award":["2022JQ-326"],"award-info":[{"award-number":["2022JQ-326"]}]},{"name":"National Natural Science Foundation of China","award":["2021GY-133"],"award-info":[{"award-number":["2021GY-133"]}]},{"name":"National Natural Science Foundation of China","award":["YCS21212142"],"award-info":[{"award-number":["YCS21212142"]}]},{"name":"Natural Science Foundation of Shaanxi Province","award":["52303392"],"award-info":[{"award-number":["52303392"]}]},{"name":"Natural Science Foundation of Shaanxi Province","award":["2020JC-50"],"award-info":[{"award-number":["2020JC-50"]}]},{"name":"Natural Science Foundation of Shaanxi Province","award":["2022JQ-326"],"award-info":[{"award-number":["2022JQ-326"]}]},{"name":"Natural Science Foundation of Shaanxi Province","award":["2021GY-133"],"award-info":[{"award-number":["2021GY-133"]}]},{"name":"Natural Science Foundation of Shaanxi Province","award":["YCS21212142"],"award-info":[{"award-number":["YCS21212142"]}]},{"name":"Natural Science Basic Research Program of Shaanxi","award":["52303392"],"award-info":[{"award-number":["52303392"]}]},{"name":"Natural Science Basic Research Program of Shaanxi","award":["2020JC-50"],"award-info":[{"award-number":["2020JC-50"]}]},{"name":"Natural Science Basic Research Program of Shaanxi","award":["2022JQ-326"],"award-info":[{"award-number":["2022JQ-326"]}]},{"name":"Natural Science Basic Research Program of Shaanxi","award":["2021GY-133"],"award-info":[{"award-number":["2021GY-133"]}]},{"name":"Natural Science Basic Research Program of Shaanxi","award":["YCS21212142"],"award-info":[{"award-number":["YCS21212142"]}]},{"name":"Shaanxi Provincial Key Research and Development Program China","award":["52303392"],"award-info":[{"award-number":["52303392"]}]},{"name":"Shaanxi Provincial Key Research and Development Program China","award":["2020JC-50"],"award-info":[{"award-number":["2020JC-50"]}]},{"name":"Shaanxi Provincial Key Research and Development Program China","award":["2022JQ-326"],"award-info":[{"award-number":["2022JQ-326"]}]},{"name":"Shaanxi Provincial Key Research and Development Program China","award":["2021GY-133"],"award-info":[{"award-number":["2021GY-133"]}]},{"name":"Shaanxi Provincial Key Research and Development Program China","award":["YCS21212142"],"award-info":[{"award-number":["YCS21212142"]}]},{"name":"Xi\u2019an Shiyou University College Students\u2019 Innovation and Entrepreneurship Training Project","award":["52303392"],"award-info":[{"award-number":["52303392"]}]},{"name":"Xi\u2019an Shiyou University College Students\u2019 Innovation and Entrepreneurship Training Project","award":["2020JC-50"],"award-info":[{"award-number":["2020JC-50"]}]},{"name":"Xi\u2019an Shiyou University College Students\u2019 Innovation and Entrepreneurship Training Project","award":["2022JQ-326"],"award-info":[{"award-number":["2022JQ-326"]}]},{"name":"Xi\u2019an Shiyou University College Students\u2019 Innovation and Entrepreneurship Training Project","award":["2021GY-133"],"award-info":[{"award-number":["2021GY-133"]}]},{"name":"Xi\u2019an Shiyou University College Students\u2019 Innovation and Entrepreneurship Training Project","award":["YCS21212142"],"award-info":[{"award-number":["YCS21212142"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>The microwave absorption performance of high-entropy alloys (HEAs) can be improved by reducing the reflection coefficient of electromagnetic waves and broadening the absorption frequency band. The present work prepared flaky irregular-shaped Al1.5Co4Fe2Cr and Al1.5Co4Fe2Cr@rGO alloy powders by mechanical alloying (MA) at different rotational speeds. It was found that the addition of trace amounts of reduced graphene oxide (rGO) had a favorable effect on the impedance matching, reflection loss (RL), and effective absorbing bandwidth (EAB) of the Al1.5Co4Fe2Cr@rGO HEA composite powders. The EAB of the alloy powders prepared at 300 rpm increased from 2.58 GHz to 4.62 GHz with the additive, and the RL increased by 2.56 dB. The results showed that the presence of rGO modified the complex dielectric constant of HEA powders, thereby enhancing their dielectric loss capability. Additionally, the presence of lamellar rGO intensified the interfacial reflections within the absorber, facilitating the dissipation of electromagnetic waves. The effect of the ball milling speed on the defect concentration of the alloy powders also affected its wave absorption performance. The samples prepared at 350 rpm had the best wave absorption performance, with an RL of \u221216.23 and \u221217.28 dB for a thickness of 1.6 mm and EAB of 5.77 GHz and 5.43 GHz, respectively.<\/jats:p>","DOI":"10.3390\/e26010060","type":"journal-article","created":{"date-parts":[[2024,1,10]],"date-time":"2024-01-10T07:50:48Z","timestamp":1704873048000},"page":"60","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Effect of Reduced Graphene Oxide on Microwave Absorbing Properties of Al1.5Co4Fe2Cr High-Entropy Alloys"],"prefix":"10.3390","volume":"26","author":[{"given":"Shuo","family":"Wang","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering, Xi\u2019an Shiyou University, Xi\u2019an 710065, China"},{"name":"Xi\u2019an Rare Metal Materials Institute Co., Ltd., Xi\u2019an 710016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weiran","family":"Zhang","sequence":"additional","affiliation":[{"name":"Xi\u2019an Rare Metal Materials Institute Co., Ltd., Xi\u2019an 710016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6355-9923","authenticated-orcid":false,"given":"Yong","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, University of Science and Technology Beijing, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinqiang","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Xi\u2019an Shiyou University, Xi\u2019an 710065, China"},{"name":"Xi\u2019an Rare Metal Materials Institute Co., Ltd., Xi\u2019an 710016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ruixuan","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, University of Science and Technology Beijing, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yujie","family":"Zhong","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Xi\u2019an Shiyou University, Xi\u2019an 710065, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2936","DOI":"10.1007\/s40843-022-2074-5","article-title":"Multi-spectrum bands compatibility: New trends in stealth materials research","volume":"65","author":"Zhao","year":"2022","journal-title":"Sci. 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