{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T19:17:56Z","timestamp":1790882276596,"version":"4.1.0"},"reference-count":31,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"2024 Major Science and Technology Special Project of Henan Province, China","award":["241100220400"],"award-info":[{"award-number":["241100220400"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Fe-based amorphous alloys are attractive for microwave attenuation because they combine soft-magnetic behavior, relatively high electrical resistivity compared with compositionally similar crystalline alloys, and flexible structural design. A persistent challenge is to achieve strong attenuation and broad bandwidth at a small matching thickness without relying on complex multiphase architectures. Fe85P9C2B2Si2 amorphous powders were prepared by pulse-discharge atomization and the fine spherical fraction was subsequently flattened by controlled wet-ball milling. The atomized powders remain predominantly amorphous, whereas milling produces high-aspect-ratio microflakes together with localized approximately 5 nm band-like heterogeneous regions containing limited nanocrystalline order. Relative to the spherical powders, FP5 shows stronger dielectric and magnetic responses. At 16.9 GHz and a thickness of 1.7 mm, the attenuation constant reaches 235.9 m\u22121 and the normalized input-impedance magnitude is 0.999, indicating that strong intrinsic attenuation coincides with nearly ideal impedance matching. FP5 consequently exhibits a minimum reflection loss of \u221253.5 dB and an effective absorption bandwidth of 6.2 GHz (11.8\u201318.0 GHz) at 1.85 mm. The results indicate that the high-aspect-ratio morphology is the better-supported primary structural contribution to the improved absorption, while local amorphous\/nanocrystalline heterogeneity may provide an additional contribution.<\/jats:p>","DOI":"10.3390\/nano16191242","type":"journal-article","created":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T18:43:24Z","timestamp":1790880204000},"page":"1242","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Fe-Based Amorphous Microflakes with Deformation-Induced Nanoscale Heterogeneity Prepared by Pulse-Discharge Atomization and Ball Milling for Broadband Microwave Absorption"],"prefix":"10.3390","volume":"16","author":[{"given":"Chekai","family":"Liu","sequence":"first","affiliation":[{"name":"Luoyang Ship Material Research Institute, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"}]},{"given":"Xinghua","family":"Wang","sequence":"additional","affiliation":[{"name":"Luoyang Ship Material Research Institute, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"resources","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"}]},{"given":"Zonghai","family":"Zhao","sequence":"additional","affiliation":[{"name":"China Ship Research and Development Academy, Beijing 100101, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"}]},{"given":"Rui","family":"Ding","sequence":"additional","affiliation":[{"name":"Luoyang Ship Material Research Institute, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"}]},{"given":"Yanming","family":"Wu","sequence":"additional","affiliation":[{"name":"Luoyang Ship Material Research Institute, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"data-curation","vocabulary":"credit"}]},{"given":"Chenghui","family":"Hu","sequence":"additional","affiliation":[{"name":"Luoyang Ship Material Research Institute, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"}]},{"given":"Wei","family":"Xue","sequence":"additional","affiliation":[{"name":"Luoyang Ship Material Research Institute, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"}]},{"given":"Jingwu","family":"Liu","sequence":"additional","affiliation":[{"name":"Luoyang Ship Material Research Institute, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"visualization","vocabulary":"credit"}]},{"given":"Xinghao","family":"Wei","sequence":"additional","affiliation":[{"name":"Luoyang Ship Material Research Institute, Luoyang 471023, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"formal-analysis","vocabulary":"credit"}]}],"member":"1968","published-online":{"date-parts":[[2026,10,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1666","DOI":"10.1007\/s10854-023-11073-7","article-title":"Enhanced microwave absorption performance of FeSiBCCr flake amorphous powder from ball milling","volume":"34","author":"Wu","year":"2023","journal-title":"J. Mater. Sci. Mater. Electron."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1016\/j.jallcom.2017.02.089","article-title":"Microwave absorbing properties of FeCrMoNiPBCSi amorphous powders composite","volume":"705","author":"Chen","year":"2017","journal-title":"J. Alloys Compd."},{"key":"ref_3","first-page":"64","article-title":"Research Status and Perspectives of Electromagnetic Wave Absorption Materials Used in Ship","volume":"41","author":"Hou","year":"2025","journal-title":"Dev. Appl. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Zheng, W., Ye, W., Yang, P., Wang, D., Xiong, Y., Liu, Z., Qi, J., and Zhang, Y. (2022). Recent progress in iron-based microwave absorbing composites: A review and prospective. Molecules, 27.","DOI":"10.3390\/molecules27134117"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"704","DOI":"10.1016\/j.apt.2016.02.026","article-title":"Amorphous FexB100\u2212x nanostructures: Facile synthesis, magnetic properties and their applications as enhanced microwave absorbers at S- and C-bands","volume":"27","author":"Zheng","year":"2016","journal-title":"Adv. Powder Technol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"e70076","DOI":"10.1002\/jnm.70076","article-title":"Development of Fe-Based Amorphous\/Nanocrystalline Alloys for Electromagnetic Interference Mitigation","volume":"38","author":"Guo","year":"2025","journal-title":"Int. J. Numer. Model.-Electron. Netw. Devices Fields"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"177344","DOI":"10.1016\/j.jallcom.2024.177344","article-title":"MOF composite FeSiB-based nano-amorphous magnetic powder and the influence of porous morphology on dielectric polarization and microwave absorption mechanisms","volume":"1010","author":"Dong","year":"2025","journal-title":"J. Alloys Compd."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.msea.2006.02.300","article-title":"Wear resistivity of super-precision microgear made of Ni-based metallic glass","volume":"449","author":"Ishida","year":"2007","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"S2","DOI":"10.1016\/j.jallcom.2013.11.122","article-title":"Development and applications of Fe- and Co-based bulk glassy alloys and their prospects","volume":"615","author":"Inoue","year":"2014","journal-title":"J. Alloys Compd."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"768","DOI":"10.1007\/s12613-025-3252-1","article-title":"Advances in Fe-based electromagnetic wave absorbers: Multiscale engineering from atomic defects to macroscopic architectures for performance optimization","volume":"33","author":"Luo","year":"2026","journal-title":"Int. J. Miner. Metall. Mater."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"16614","DOI":"10.1021\/acsanm.5c02650","article-title":"Electromagnetic Wave Absorption Performance of Co\u2013Fe Alloy: Review and Perspective","volume":"8","author":"Xu","year":"2025","journal-title":"ACS Appl. Nano Mater."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"120434","DOI":"10.1016\/j.carbon.2025.120434","article-title":"Heterogeneous interface engineering in FexOy@C@Expanded graphite array structure with confined magnetic coupling to boost microwave absorption","volume":"242","author":"Yang","year":"2025","journal-title":"Carbon"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Zhou, M.Y., Zhou, Z.H., and Cheng, H.F. (2026). Composition and Structural Design of Magnetic Alloy\/Composites for High-Performance Microwave Absorption: A Review. Nanomaterials, 16.","DOI":"10.3390\/nano16050290"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"241","DOI":"10.1016\/j.powtec.2017.08.059","article-title":"Glass formation and magnetic study of new Fe70Ta5Si10C15 powders prepared by mechanical alloying with high thermal stability","volume":"322","author":"Yekta","year":"2017","journal-title":"Powder Technol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"190276","DOI":"10.1016\/j.jallcom.2026.190276","article-title":"Optimizing annealing conditions to enhance microwave absorption in FeSiB amorphous alloy powder","volume":"1080","author":"Zhang","year":"2026","journal-title":"J. Alloys Compd."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Wang, Z., An, C., Wang, F., Liang, H., Hou, Z., Shen, H., and Wu, H. (2025). Enhanced Microwave Absorption Performance of Amorphous Co100\u2212xFex Nanoparticles. Nanomaterials, 15.","DOI":"10.3390\/nano15141091"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/j.jmst.2023.06.027","article-title":"Formation mechanism of Fe-based amorphous powders produced by spark erosion","volume":"170","author":"Liu","year":"2024","journal-title":"J. Mater. Sci. Technol."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"156","DOI":"10.1016\/j.powtec.2018.01.012","article-title":"Spark erosion as a high-throughput method for producing bimodal nanostructured 316L stainless steel powder","volume":"328","author":"Harrington","year":"2018","journal-title":"Powder Technol."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.matpr.2021.12.138","article-title":"The outcome of dielectric fluids in electrical discharge machining performance: A review","volume":"56","author":"Biswas","year":"2022","journal-title":"Mater. Today Proc."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"823","DOI":"10.1063\/1.1635973","article-title":"Spark-eroded particles: Influence of processing parameters","volume":"95","author":"Carrey","year":"2004","journal-title":"J. Appl. Phys."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"415604","DOI":"10.1088\/0957-4484\/23\/41\/415604","article-title":"Spark erosion: A high production rate method for producing Bi0.5Sb1.5Te3 nanoparticles with enhanced thermoelectric performance","volume":"23","author":"Nguyen","year":"2012","journal-title":"Nanotechnology"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.apt.2013.12.005","article-title":"New developments in spark production of nanoparticles","volume":"25","author":"Pfeiffer","year":"2014","journal-title":"Adv. Powder Technol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2263","DOI":"10.1088\/1674-1056\/17\/6\/054","article-title":"Influence of shape anisotropy on microwave complex permeability in carbonyl iron flakes\/epoxy resin composites","volume":"17","author":"Wen","year":"2008","journal-title":"Chin. Phys. B"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"112209","DOI":"10.1016\/j.jpcs.2024.112209","article-title":"Enhancement of the microwave absorption performance of flaky FeSiCr powder through the compounding of cobalt ferrite","volume":"193","author":"Wu","year":"2024","journal-title":"J. Phys. Chem. Solids"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"181442","DOI":"10.1016\/j.jallcom.2025.181442","article-title":"Constructing carbonyl iron\/FeSiCr heterointerfaces in multilayered FeSiCr@ferrite composites for tunable broadband microwave absorption","volume":"1034","author":"Jing","year":"2025","journal-title":"J. Alloys Compd."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"5981","DOI":"10.1007\/s11664-018-6447-7","article-title":"Microwave Absorption Properties of Fe-Based Amorphous Particles Prepared Using Ball-Milling Method","volume":"47","author":"Ding","year":"2018","journal-title":"J. Electron. Mater."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"064302","DOI":"10.1063\/1.3211987","article-title":"Synthesis and microwave electromagnetic properties of CoFe alloy nanoflakes prepared with hydrogen-thermal reduction method","volume":"106","author":"Gong","year":"2009","journal-title":"J. Appl. Phys."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"4414","DOI":"10.1038\/s41467-018-06919-2","article-title":"Shear-band affected zone revealed by magnetic domains in a ferromagnetic metallic glass","volume":"9","author":"Shen","year":"2018","journal-title":"Nat. Commun."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"233","DOI":"10.1016\/j.jmmm.2004.07.045","article-title":"Particle size influence to the microwave properties of iron based magnetic particulate composites","volume":"285","author":"Wu","year":"2005","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1016\/j.jallcom.2019.05.061","article-title":"Nanolayered flaky Fe-based amorphous-nanocrystalline\/graphite sheet composites with enhanced microwave absorbing properties","volume":"797","author":"Shi","year":"2019","journal-title":"J. Alloys Compd."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"720","DOI":"10.1016\/j.jallcom.2018.11.112","article-title":"Synthesis and enhanced microwave absorption performance of CIP@ SiO2@Mn0.6Zn0.4Fe2O4 ferrite composites","volume":"779","author":"Chen","year":"2019","journal-title":"J. Alloys Compd."}],"container-title":["Nanomaterials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2079-4991\/16\/19\/1242\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T18:53:46Z","timestamp":1790880826000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2079-4991\/16\/19\/1242"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,10,1]]},"references-count":31,"journal-issue":{"issue":"19","published-online":{"date-parts":[[2026,10]]}},"alternative-id":["nano16191242"],"URL":"https:\/\/doi.org\/10.3390\/nano16191242","relation":{},"ISSN":["2079-4991"],"issn-type":[{"value":"2079-4991","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,10,1]]}}}