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High-entropy silicide ceramics developed from (TiZrNbMoW)Si2 formulation doped with aluminum
journal contribution
posted on 2020-03-04, 11:54 authored by Yuan Qin, Jin-Cheng Wang, Ji-Xuan Liu, Xiao-Feng Wei, Fei Li, Guo-Jun Zhang, Chengxi JingChengxi Jing, Jiawei Zhao, Houzheng WuWe report a success in synthesizing high entropy silicides (HES) compounds and manufacturing well-densified HES ceramics through spark plasma sintering. For a designed chemical formula as (Ti0.2Zr0.2Nb0.2Mo0.2W0.2)Si2, the as-synthesized HES showed a formula as (Ti0.22Zr0.06Nb0.29Mo0.22W0.21)Si2 with zirconium partially oxidized into zirconia. Doping with aluminum resulted in a HES with the same composition, promoted formation of ZrSi2 and Al2O3. XRD analysis of as-synthesized HES is well supported by the calculated diffraction data based on a 2 × 3x1 supercell with HCP crystal structure and experimental chemical composition. The cations in this HES crystal structure can occupy their positions randomly with little change of its lattice parameters and formation enthalpy.
Funding
National Natural Science Funds (No. 51873103, 51532009)
Capacity Building Project of Some Local Colleges and Universities in Shanghai (No. 17030501200)
Talent Program of Shanghai University of Engineering Science (No. 2017RC422017)
First-rate Discipline Construction of Applied Chemistry (No. 2018xk-B-06)
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Published in
Journal of the European Ceramic SocietyVolume
40Issue
8Pages
2752 - 2759Publisher
Elsevier BVVersion
- AM (Accepted Manuscript)
Rights holder
© ElsevierPublisher statement
This paper was accepted for publication in the journal Journal of the European Ceramic Society and the definitive published version is available at https://doi.org/10.1016/j.jeurceramsoc.2020.02.059.Acceptance date
2020-02-27Publication date
2020-02-28Copyright date
2020ISSN
0955-2219Publisher version
Language
- en
Depositor
Dr Houzheng Wu. Deposit date: 3 March 2020Usage metrics
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