{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T17:32:07Z","timestamp":1777570327759,"version":"3.51.4"},"reference-count":14,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2016,10,20]],"date-time":"2016-10-20T00:00:00Z","timestamp":1476921600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>The isothermal oxidation resistance of Al0.2Co1.5CrFeNi1.5Ti0.3 high-entropy alloy is analyzed and the microstructural evolution of the oxide layer is studied. The limited aluminum, about 3.6 at %, leads to the non-continuous alumina. The present alloy is insufficient for severe circumstances only due to chromium oxide that is 10 \u03bcm after 1173 K for 360 h. Thus, the aluminized high-entropy alloys (HEAs) are further prepared by the industrial packing cementation process at 1273 K and 1323 K. The aluminizing coating is 50 \u03bcm at 1273 K after 5 h. The coating growth is controlled by the diffusion of aluminum. The interdiffusion zone reveals two regions that are the Ti-, Co-, Ni-rich area and the Fe-, Cr-rich area. The oxidation resistance of aluminizing HEA improves outstandingly, and sustains at 1173 K and 1273 K for 441 h without any spallation. The alumina at the surface and the stable interface contribute to the performance of this Al0.2Co1.5CrFeNi1.5Ti0.3 alloy.<\/jats:p>","DOI":"10.3390\/e18100376","type":"journal-article","created":{"date-parts":[[2016,10,20]],"date-time":"2016-10-20T10:15:49Z","timestamp":1476958549000},"page":"376","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Isothermal Oxidation of Aluminized Coatings on High-Entropy Alloys"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3072-7916","authenticated-orcid":false,"given":"Che-Wei","family":"Tsai","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan"}]},{"given":"Kuen-Cheng","family":"Sung","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan"}]},{"given":"Kzauki","family":"Kasai","sequence":"additional","affiliation":[{"name":"Surface and Interface Kinetics Group, National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan"}]},{"given":"Hideyuki","family":"Murakami","sequence":"additional","affiliation":[{"name":"Surface and Interface Kinetics Group, National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan"}]}],"member":"1968","published-online":{"date-parts":[[2016,10,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1002\/adem.200300567","article-title":"Nanostructured high-entropy alloys with multiple principal elements: Novel alloy design concepts and outcomes","volume":"6","author":"Yeh","year":"2004","journal-title":"Adv. Eng. Mater."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"633","DOI":"10.3166\/acsm.31.633-648","article-title":"Recent progress in high-entropy alloys","volume":"31","author":"Yeh","year":"2006","journal-title":"Ann. Chim. Sci. Mater."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"214","DOI":"10.1016\/j.msea.2008.12.053","article-title":"Microstructure and mechanical properties of CoCrFeNiTiAlx high-entropy alloys","volume":"508","author":"Zhang","year":"2009","journal-title":"Mater. Sci. Eng. A Struct. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/j.jallcom.2009.12.010","article-title":"Characterization of nanocrystalline CoCrFeNiTiAl high-entropy solid solution processed by mechanical alloying","volume":"495","author":"Zhang","year":"2010","journal-title":"J. Alloys Compd."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1016\/j.intermet.2012.03.059","article-title":"Effects of annealing treatment on properties of CoCrFeNiTiAlx multi-component alloys","volume":"28","author":"Zhang","year":"2012","journal-title":"Intermetallics"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.intermet.2011.10.010","article-title":"Effects of annealing treatment on phase composition and microstructure of CoCrFeNiTiAlx high-entropy alloys","volume":"22","author":"Zhang","year":"2012","journal-title":"Intermetallics"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"6308","DOI":"10.1016\/j.actamat.2011.06.041","article-title":"Microstructure and wear behavior of AlxCo1.5CrFeNi1.5Tiy high-entropy alloys","volume":"59","author":"Chuang","year":"2011","journal-title":"Acta Mater."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"184","DOI":"10.1007\/s11661-013-2097-9","article-title":"On the Solidification and Phase Stability of a Co-Cr-Fe-Ni-Ti High-Entropy Alloy","volume":"45","author":"Yeh","year":"2014","journal-title":"Metall. Mater. Trans. A Phys. Metall. Mater. Sci."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"379","DOI":"10.1016\/j.jallcom.2015.09.042","article-title":"The evolution of microstructures and high temperature properties of AlxCo1.5CrFeNi1.5Tiy high entropy alloys","volume":"653","author":"Chang","year":"2015","journal-title":"J. Alloys Compd."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1016\/S0257-8972(02)00843-5","article-title":"Characterization of phases of aluminized nickel base superalloys","volume":"167","author":"Wollner","year":"2003","journal-title":"Surf. Coat. Technol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"915","DOI":"10.1016\/j.matchemphys.2013.09.016","article-title":"Formation and cyclic oxidation resistance of Hf-Co-modified aluminide coatings on nickel base superalloys","volume":"143","author":"Li","year":"2014","journal-title":"Mater. Chem. Phys."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1768","DOI":"10.2320\/matertrans.M2010439","article-title":"Effect of Surface Treatment and Crystal Orientation on Microstructural Changes in Aluminized Ni-Based Single-Crystal Superalloy","volume":"52","author":"Kasai","year":"2011","journal-title":"Mater. Trans."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2252","DOI":"10.2320\/matertrans.M2013205","article-title":"Effect of Thermal History on Microstructural Changes in Aluminized Nickel-Based Single-Crystal Superalloy","volume":"54","author":"Kasai","year":"2013","journal-title":"Mater. Trans."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"428","DOI":"10.1016\/j.scriptamat.2008.04.025","article-title":"Anisotropy of secondary reaction zone formation in aluminized Ni-based single-crystal superalloys","volume":"59","author":"Murakami","year":"2008","journal-title":"Scr. Mater."}],"container-title":["Entropy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1099-4300\/18\/10\/376\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:33:36Z","timestamp":1760211216000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1099-4300\/18\/10\/376"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,10,20]]},"references-count":14,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2016,10]]}},"alternative-id":["e18100376"],"URL":"https:\/\/doi.org\/10.3390\/e18100376","relation":{},"ISSN":["1099-4300"],"issn-type":[{"value":"1099-4300","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,10,20]]}}}