Journal Articles Open Ceramics Year : 2024

Synthesis and characterization of a new (Ti1-yCuy)2(Al1-xCux)C MAX phase solid solution

Abstract

New [Ti (1-y) Cu y ] 2 [Al (1-x) Cu x ]C solid solutions have been synthesized by solid-state reaction performed at 760 and 800 • C on compacted Ti 2 AlC-40 vol % Cu composite particles produced by mechanical milling. Using XRD and EDXS, it is demonstrated that Cu atoms can enter the crystallographic structure of the Ti 2 AlC MAX phase, whereas a Cu(Al) solid solution is formed during thermal treatment. A selective chemical etching of the Cu(Al) matrix is performed to determine the composition of the MAX phase solid solution by analyzing the filtrate and the solid phase using ICP-OES end EDXS methods respectively. (Ti 0.85 Cu 0.15) 2 (Al 0.75 Cu 0.25)C and (Ti 0.85 Cu 0.15) 2 (Al 0.58 Cu 0.42)C solid solutions are formed after thermal treatment at 760 and 800 • C, respectively. The substitution rate on the A site of the MAX phase thus increases with temperature.

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hal-04365613 , version 1 (28-12-2023)

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L Aouchiche, D Eyidi, Véronique Gauthier-Brunet, M Nechiche, S Dubois. Synthesis and characterization of a new (Ti1-yCuy)2(Al1-xCux)C MAX phase solid solution. Open Ceramics, 2024, 17, ⟨10.1016/j.oceram.2023.100530⟩. ⟨hal-04365613⟩
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