{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,20]],"date-time":"2026-01-20T00:08:18Z","timestamp":1768867698788,"version":"3.49.0"},"reference-count":34,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T00:00:00Z","timestamp":1768694400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Natural Science Foundation of Shandong Province China","award":["ZR2021ME089"],"award-info":[{"award-number":["ZR2021ME089"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Interfacial adhesion between selective laser-melted (SLM) AlSi10Mg and polyimide (PI) insulating coatings is often limited by mismatched physicochemical properties. To improve adhesion, Al-rich and Si-rich microstructured surfaces were fabricated on the XY plane (perpendicular to the build direction) and the Z plane (parallel to the build direction) by acidic and alkaline etching, exploiting the characteristic microstructure of SLM AlSi10Mg. Surface topography, chemical composition, and wettability were characterized, and interfacial mechanical performance was evaluated by shear and pull-off tests. The microstructures increased surface roughness and improved wettability. The shear strength rose from 2.6 \u00b1 1.5 MPa for the polished surface to 43.2 \u00b1 8.6 MPa. The polished surface showed a pull-off strength of 2.2 \u00b1 0.25 MPa. In pull-off tests, failure mainly occurred within the dolly\/adhesive\/PI system, indicating that the interfacial tensile strength exceeded the strength of the adhesive system; the maximum measured pull-off strength was 29.0 \u00b1 1.3 MPa. Fractography predominantly showed cohesive failure in PI on Al-rich microstructures. Si-rich microstructures exhibited mixed failure, including fracture of the Si skeleton and tearing of PI, together with interfacial microcracks.<\/jats:p>","DOI":"10.3390\/ma19020385","type":"journal-article","created":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T11:35:27Z","timestamp":1768822527000},"page":"385","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Effect of Selectively Etched Al-Rich and Si-Rich Microstructures on the Adhesion of Polyimide Coatings to SLM AlSi10Mg"],"prefix":"10.3390","volume":"19","author":[{"given":"Jianzhu","family":"Li","sequence":"first","affiliation":[{"name":"State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology at Weihai, Wenhua West Road 2, Weihai 264209, China"},{"name":"School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shuo","family":"Yang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology at Weihai, Wenhua West Road 2, Weihai 264209, China"},{"name":"School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yujie","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology at Weihai, Wenhua West Road 2, Weihai 264209, China"},{"name":"School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,1,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Khina, A.G., Bulkatov, D.P., Storozhuk, I.P., and Sokolov, A.P. 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