{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T21:00:36Z","timestamp":1792270836202,"version":"4.4.0"},"reference-count":46,"publisher":"Tsinghua University Press","issue":"8","license":[{"start":{"date-parts":[[2022,7,25]],"date-time":"2022-07-25T00:00:00Z","timestamp":1658707200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2022,7,25]],"date-time":"2022-07-25T00:00:00Z","timestamp":1658707200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J Adv Ceram"],"published-print":{"date-parts":[[2022,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The order-disorder transition (ODT) of A<jats:sub>2<\/jats:sub>B<jats:sub>2<\/jats:sub>O<jats:sub>7<\/jats:sub> compounds obtained enormous attention owing to the potential application for thermal barrier coating (TBC) design. In this work, the influence of ODT on the mechanical and thermophysical properties of dual-phase A<jats:sub>2<\/jats:sub>B<jats:sub>2<\/jats:sub>O<jats:sub>7<\/jats:sub> high-entropy ceramics was investigated by substituting Ce<jats:sup>4+<\/jats:sup> and Hf<jats:sup>4+<\/jats:sup> with different ionic radii on B-sites (Zr<jats:sup>4+<\/jats:sup>). The X-ray diffraction (XRD), Raman, and transmission electron microscopy (TEM) results show that <jats:inline-formula><jats:alternatives><jats:tex-math>$$r_{\\rm{A}^{3+}}\/r_{\\rm{B}^{4+}}=1.47$$<\/jats:tex-math><mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\">\n                  <mml:msub>\n                    <mml:mi>r<\/mml:mi>\n                    <mml:mrow>\n                      <mml:msup>\n                        <mml:mrow>\n                          <mml:mi>A<\/mml:mi>\n                        <\/mml:mrow>\n                        <mml:mrow>\n                          <mml:mn>3<\/mml:mn>\n                          <mml:mo>+<\/mml:mo>\n                        <\/mml:mrow>\n                      <\/mml:msup>\n                    <\/mml:mrow>\n                  <\/mml:msub>\n                  <mml:mrow>\n                    <mml:mo>\/<\/mml:mo>\n                  <\/mml:mrow>\n                  <mml:msub>\n                    <mml:mi>r<\/mml:mi>\n                    <mml:mrow>\n                      <mml:msup>\n                        <mml:mrow>\n                          <mml:mi>B<\/mml:mi>\n                        <\/mml:mrow>\n                        <mml:mrow>\n                          <mml:mn>4<\/mml:mn>\n                          <mml:mo>+<\/mml:mo>\n                        <\/mml:mrow>\n                      <\/mml:msup>\n                    <\/mml:mrow>\n                  <\/mml:msub>\n                  <mml:mo>=<\/mml:mo>\n                  <mml:mn>1.47<\/mml:mn>\n                <\/mml:math><\/jats:alternatives><\/jats:inline-formula> is the critical value of ODT phase boundary with different doping B-site ion contents, and the energy dispersive spectroscopy (EDS) results further indicate the uniform distribution of elements. Interestingly, owing to the high intrinsic disorder derived from high-entropy effect, the A<jats:sup>2<\/jats:sup>B<jats:sup>2<\/jats:sup>O<jats:sup>7<\/jats:sup> high-entropy ceramics exhibit unreduced modulus (<jats:italic>E<\/jats:italic><jats:sub>0<\/jats:sub> \u2248 230 GPa) and enhanced mechanical properties (<jats:italic>HV<\/jats:italic> \u2248 10 GPa, <jats:italic>K<\/jats:italic><jats:sub>IC<\/jats:sub> \u2248 2.3 MPa\u00b7m<jats:sup>0.5<\/jats:sup>). A<jats:sub>2<\/jats:sub>B<jats:sub>2<\/jats:sub>O<jats:sub>7<\/jats:sub> high-entropy ceramics exhibit excellent thermal stability with relatively high thermal expansion coefficients (TECs) (Hf0.25, 11.20\u00d710<jats:sup>\u22126<\/jats:sup> K<jats:sup>\u22121<\/jats:sup>, 1000 \u00b0C). Moreover, the matching calculation implied that the ODT further enhances the phonon scattering coefficient, leading to a relatively lower thermal conductivity of (La<jats:sub>0.25<\/jats:sub>Eu<jats:sub>0.25<\/jats:sub>Gd<jats:sub>0.25<\/jats:sub>Yb<jats:sub>0.25<\/jats:sub>)<jats:sub>2<\/jats:sub>(Zr<jats:sub>0.85<\/jats:sub>Ce<jats:sub>0.15<\/jats:sub>)<jats:sub>2<\/jats:sub>O<jats:sub>7<\/jats:sub> (1.48\u20131.51 W\/(m\u00b7K), 100\u2013500 \u00b0C) compared with other components. This present work provides a novel composition design principle for high-entropy ceramics, as well as a material selection rule for high-temperature insulation applications.<\/jats:p>","DOI":"10.1007\/s40145-022-0605-3","type":"journal-article","created":{"date-parts":[[2022,7,25]],"date-time":"2022-07-25T14:03:58Z","timestamp":1658757838000},"page":"1222-1234","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":73,"title":["Influence of order-disorder transition on the mechanical and thermophysical properties of A2B2O7 high-entropy ceramics"],"prefix":"10.26599","volume":"11","author":[{"given":"Jiatong","family":"Zhu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mingyue","family":"Wei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Runwu","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xuanyu","family":"Meng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ping","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinlong","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guangzhong","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Feng","family":"Gao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"11138","published-online":{"date-parts":[[2022,7,25]]},"reference":[{"key":"605_CR1","doi-asserted-by":"publisher","first-page":"280","DOI":"10.1126\/science.1068609","volume":"296","author":"NP Padture","year":"2002","unstructured":"Padture NP, Gell M, Jordan EH. 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