{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T09:44:50Z","timestamp":1762508690518,"version":"build-2065373602"},"reference-count":29,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2022,2,1]],"date-time":"2022-02-01T00:00:00Z","timestamp":1643673600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["UIDB\/50010\/2020 and UIDP\/50010\/2020"],"award-info":[{"award-number":["UIDB\/50010\/2020 and UIDP\/50010\/2020"]}]},{"name":"Ministerio de Econom\u00eda y Competitividad of Spain 35","award":["MAT2015-70780-C4-4-P and PID2019-106631GB-C44"],"award-info":[{"award-number":["MAT2015-70780-C4-4-P and PID2019-106631GB-C44"]}]},{"DOI":"10.13039\/100012818","name":"Comunidad de Madrid","doi-asserted-by":"publisher","award":["S2018\/NMT-36 4411ADITIMAT-CM"],"award-info":[{"award-number":["S2018\/NMT-36 4411ADITIMAT-CM"]}],"id":[{"id":"10.13039\/100012818","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003759","name":"Universidad Polit\u00e9cnica de Madrid","doi-asserted-by":"publisher","award":["M190020074EMTG,COAT4FUSION"],"award-info":[{"award-number":["M190020074EMTG,COAT4FUSION"]}],"id":[{"id":"10.13039\/501100003759","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Crystals"],"abstract":"<jats:p>CrNbTaVWx with (x = 1 and 1.7) high entropy alloys have been devised for thermal barriers between the plasma-facing tungsten tiles and the copper-based heat sink in the first wall of fusion nuclear reactors. These novel materials were prepared by ball milling and consolidated by Upgrade Field Assisted Sintering Technology at 1873 K under an applied pressure of 90 MPa for 10 min. In this work, the structural and mechanical properties of these materials were evaluated. Consolidated samples presented a major phase with a bcc-type structure with lattice parameter value of 0.316 nm for CrNbTaVW and CrNbTaVW1.7 compositions. Moreover, observation of the microstructures evidences also two minor phases: Ta-Nb-Cr and Ta-V rich (in which carbon is detected). Despite the similarity in the structural properties of these two alloys, their mechanical properties are distinct. The flexural stress for the sample with higher amount of W (CrNbTaVW1.7) is higher by 50% in the 298\u2013873 K range, with an increased strain to fracture, which can be associated with reduced brittleness caused by the additional W incorporation.<\/jats:p>","DOI":"10.3390\/cryst12020219","type":"journal-article","created":{"date-parts":[[2022,2,1]],"date-time":"2022-02-01T22:16:18Z","timestamp":1643753778000},"page":"219","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Improvement of Mechanical Properties with Non-Equimolar CrNbTaVW High Entropy Alloy"],"prefix":"10.3390","volume":"12","author":[{"given":"Francisco","family":"Ant\u00e3o","sequence":"first","affiliation":[{"name":"Instituto de Plasmas e Fus\u00e3o Nuclear, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal"}]},{"given":"Ricardo","family":"Martins","sequence":"additional","affiliation":[{"name":"Instituto de Plasmas e Fus\u00e3o Nuclear, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal"}]},{"given":"Jos\u00e9 Brito","family":"Correia","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada do Pa\u00e7o do Lumiar, 1649-038 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4442-891X","authenticated-orcid":false,"given":"Rui Coelho","family":"da Silva","sequence":"additional","affiliation":[{"name":"Instituto de Plasmas e Fus\u00e3o Nuclear, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2640-3038","authenticated-orcid":false,"given":"Ant\u00f3nio Pereira","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"C2TN, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Campus Tecnol\u00f3gico e Nuclear, Estrada Nacional 10, 2695-066 Bobadela, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5240-6702","authenticated-orcid":false,"given":"Elena","family":"Tejado","sequence":"additional","affiliation":[{"name":"Departamento de Ciencia de Materiales-CIME, ETSI Caminos, Canales y Puertos, Universidad Polit\u00e9cnica de Madrid, 28040 Madrid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3561-5999","authenticated-orcid":false,"given":"Jos\u00e9 Ygnacio","family":"Pastor","sequence":"additional","affiliation":[{"name":"Departamento de Ciencia de Materiales-CIME, ETSI Caminos, Canales y Puertos, Universidad Polit\u00e9cnica de Madrid, 28040 Madrid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0633-8937","authenticated-orcid":false,"given":"Eduardo","family":"Alves","sequence":"additional","affiliation":[{"name":"Instituto de Plasmas e Fus\u00e3o Nuclear, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal"}]},{"given":"Marta","family":"Dias","sequence":"additional","affiliation":[{"name":"Instituto de Plasmas e Fus\u00e3o Nuclear, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,2,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"S696","DOI":"10.1088\/0029-5515\/47\/10\/S18","article-title":"Status of R & D activities on materials for fusion power reactors","volume":"47","author":"Baluc","year":"2007","journal-title":"Nucl. Fusion."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"304","DOI":"10.1016\/j.jnucmat.2003.08.009","article-title":"Brittle fracture and the brittle-to-ductile transition of tungsten","volume":"323","author":"Gumbsch","year":"2003","journal-title":"J. Nucl. Mater."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"277","DOI":"10.1016\/j.jnucmat.2014.06.014","article-title":"Developing structural, high-heat flux and plasma facing materials for a near-term DEMO fusion power plant: The EU assessment","volume":"455","author":"Stork","year":"2014","journal-title":"J. Nucl. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1263","DOI":"10.1007\/s11661-005-0218-9","article-title":"Mechanical performance of the Al x CoCrCuFeNi high-entropy alloy system with multiprincipal elements","volume":"36","author":"Tong","year":"2005","journal-title":"Metall. Mater. Trans. A"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"H1161","DOI":"10.1149\/2.056111jes","article-title":"Thermal Stability and Performance of NbSiTaTiZr High-Entropy Alloy Barrier for Copper Metallization","volume":"158","author":"Tsai","year":"2011","journal-title":"J. Electrochem. Soc."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"736","DOI":"10.1107\/S0021889813005785","article-title":"Thermal expansion and enhanced heat transfer in high-entropy alloys","volume":"46","author":"Lu","year":"2013","journal-title":"J. Appl. Cryst."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"260","DOI":"10.1016\/j.matdes.2005.07.011","article-title":"An investigation of the erosion-corrosion characteristics of ductile cast iron","volume":"28","author":"Zhou","year":"2007","journal-title":"Mater. Des."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"433","DOI":"10.1016\/S1002-0071(12)60080-X","article-title":"Phase stability in high entropy alloys: Formation of solid-solution phase or amorphous phase","volume":"21","author":"Guo","year":"2011","journal-title":"Prog. Nat. Sci. Mater. Int."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"5743","DOI":"10.1016\/j.actamat.2013.06.018","article-title":"The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy","volume":"61","author":"Otto","year":"2013","journal-title":"Acta Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2030","DOI":"10.1007\/s11837-014-1066-0","article-title":"Microstructure and Properties of Aluminum-Containing Refractory High-Entropy Alloys","volume":"66","author":"Senkov","year":"2014","journal-title":"Jom"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"3092","DOI":"10.1557\/jmr.2018.153","article-title":"Development and exploration of refractory high entropy alloys\u2014A review","volume":"33","author":"Senkov","year":"2018","journal-title":"J. Mater. Res."},{"key":"ref_12","unstructured":"The International Centre for Diffraction Data-ICDD (2020, April 23). Available online: http:\/\/www.icdd.com\/."},{"key":"ref_13","unstructured":"(2020, April 23). BAM Berlin PowderCell. Available online: http:\/\/www.ccp14.ac.uk\/ccp\/web-mirrors\/powdcell\/a_v\/v_1\/powder\/e_cell.html."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"534","DOI":"10.1002\/adem.200700240","article-title":"Solid-solution phase formation rules for multi-component alloys","volume":"10","author":"Zhang","year":"2008","journal-title":"Adv. Eng. Mater."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1564","DOI":"10.1557\/JMR.1992.1564","article-title":"An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments","volume":"7","author":"Oliver","year":"1992","journal-title":"J. Mater. Res."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1926","DOI":"10.1038\/s41598-017-02168-3","article-title":"Powder Metallurgy Processing of a WxTaTiVCr High-Entropy Alloy and Its Derivative Alloys for Fusion Material Applications","volume":"7","author":"Waseem","year":"2017","journal-title":"Sci. Rep."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"286","DOI":"10.1016\/j.ijrmhm.2019.02.005","article-title":"Mechanical and electrical properties of NbMoTaW refractory high-entropy alloy thin films","volume":"80","author":"Kim","year":"2019","journal-title":"Int. J. Refract. Met. Hard Mater."},{"key":"ref_18","unstructured":"ASMIH Committee (1990). ASM Handbook: Properties and Selection, ASM International."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"6043","DOI":"10.1016\/j.jallcom.2011.02.171","article-title":"Microstructure and room temperature properties of a high-entropy TaNbHfZrTi alloy","volume":"509","author":"Senkov","year":"2011","journal-title":"J. Alloys Compd."},{"key":"ref_20","unstructured":"Stephens, J.R. (1972). Review of Deformation Behavior of Tungsten At Temperatures Less Than 0.2 Absolute Melting Temperature. Nasa Tm X-2482, National Aeronautics and Space Administration."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"3301","DOI":"10.1557\/jmr.2018.247","article-title":"Enhanced Strength and Ductility of a Tungsten-doped CoCrNi Medium Entropy Alloy","volume":"33","author":"Wu","year":"2018","journal-title":"J. Mater. Res."},{"key":"ref_22","unstructured":"(2022, January 03). Rate Processes in Plastic Deformation of Materials: Proceedings from the Google Books. Available online: https:\/\/books.google.pt\/books\/about\/Rate_Processes_in_Plastic_Deformation_of.html?id=tXsMYAAACAAJ&redir_esc=y."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"698","DOI":"10.1016\/j.intermet.2011.01.004","article-title":"Mechanical properties of Nb25Mo25Ta25W25 and V20Nb20Mo20Ta20W20 refractory high entropy alloys","volume":"19","author":"Senkov","year":"2011","journal-title":"Intermetallics"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"2876","DOI":"10.1007\/s11661-018-4646-8","article-title":"Effect of Cold Deformation and Annealing on the Microstructure and Tensile Properties of a HfNbTaTiZr Refractory High Entropy Alloy","volume":"49","author":"Senkov","year":"2018","journal-title":"Metall. Mater. Trans. A"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1216","DOI":"10.1016\/j.fusengdes.2015.03.031","article-title":"Enhancing the DEMO divertor target by interlayer engineering","volume":"98\u201399","author":"Barrett","year":"2015","journal-title":"Fusion Eng. Des."},{"key":"ref_26","first-page":"2099","article-title":"Strong and Ductile Non-equiatomic High-Entropy Alloys 2017.pdf","volume":"69","author":"Li","year":"2017","journal-title":"J. Met."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1016\/j.intermet.2018.05.013","article-title":"Fracture resistance of high entropy alloys: A review","volume":"99","author":"Li","year":"2018","journal-title":"Intermetallics"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Ternero, F., Rosa, L.G., Urban, P., Montes, J.M., and Cuevas, F.G. (2021). Influence of the total porosity on the properties of sintered materials\u2014A review. Metals, 11.","DOI":"10.3390\/met11050730"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1016\/j.scriptamat.2016.09.036","article-title":"Fracture properties of a refractory high-entropy alloy: In situ micro-cantilever and atom probe tomography studies","volume":"128","author":"Zou","year":"2017","journal-title":"Scr. Mater."}],"container-title":["Crystals"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4352\/12\/2\/219\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T22:12:47Z","timestamp":1760134367000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4352\/12\/2\/219"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,2,1]]},"references-count":29,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2022,2]]}},"alternative-id":["cryst12020219"],"URL":"https:\/\/doi.org\/10.3390\/cryst12020219","relation":{},"ISSN":["2073-4352"],"issn-type":[{"type":"electronic","value":"2073-4352"}],"subject":[],"published":{"date-parts":[[2022,2,1]]}}}