A multicomponent γ-type (Gd1/6Tb1/6Dy1/6Tm1/6Yb1/6Lu1/6)2Si2O7 disilicate with outstanding thermal stability. Issue 11 (1st November 2020)

• Record Type: Journal Article
• Authors: Sun, Luchao; Luo, Yixiu; Ren, Xiaomin; Gao, Zenghua; Du, Tiefeng; Wu, Zhen; Wang, Jingyang
• Is Part Of: Materials research letters. Volume 8:Issue 11(2020)
• Page Start: 424
• Page End: 430
• Publication Date: 2020-11-01
• Subjects: Multicomponent complex oxide -- thermal stability -- thermal and environmental barrier coating; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2020.1783007
• Languages: English
• ISSNs: 2166-3831

Abstract

ABSTRACT: A multicomponent rare-earth disilicate (Gd1/6 Tb1/6 Dy1/6 Tm1/6 Yb1/6 Lu1/6 )2 Si2 O7 has been designed and successfully synthesized following the strategy of high entropy engineering. The as-prepared single-phase 6RE-disilicate possesses a new γ-type crystal structure (monoclinic, P 21 / c ) beyond the α-, β- and δ-type parent structures of six single RE disilicates. Six-species RE cations are homogeneously distributed on RE lattice sites and our multicomponent disilicate demonstrates outstanding thermal stability from room temperature up to around 1900°C. This work extends the knowledge of strategic multicomponent modification of complex ceramics with extremely high phase stability. IMPACT STATEMENT: The first multicomponent γ-type RE2 Si2 O7, (Gd1/6 Tb1/6 Dy1/6 Tm1/6 Yb1/6 Lu1/6 )2 Si2 O7 with outstanding phase stability is developed. It presents the possibility to design complex oxide through the 'one-from-none' strategy. GRAPHICAL ABSTRACT: UF0001