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Sobota, Piotr
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article
New Route to Synthesize High-Entropy Carbide Powders by Mechanical Alloying
Abstract
<jats:title>Abstract</jats:title><jats:p>A new route for the synthesis of the (NbTa)<jats:inline-formula><jats:alternatives><jats:tex-math>_{0.67}</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.67</mml:mn></mml:mrow></mml:msub></mml:math></jats:alternatives></jats:inline-formula>(TiHfZr)<jats:inline-formula><jats:alternatives><jats:tex-math>_{0.33}</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.33</mml:mn></mml:mrow></mml:msub></mml:math></jats:alternatives></jats:inline-formula>C and (NbTa)<jats:inline-formula><jats:alternatives><jats:tex-math>_{0.67}</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.67</mml:mn></mml:mrow></mml:msub></mml:math></jats:alternatives></jats:inline-formula>(MoHfW)<jats:inline-formula><jats:alternatives><jats:tex-math>_{0.33}</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.33</mml:mn></mml:mrow></mml:msub></mml:math></jats:alternatives></jats:inline-formula>C high-entropy carbides powders by mechanical alloying is presented. Namely, pure metal powders were wet-milled in toluene using a planetary mill under an argon atmosphere. The synthesized materials crystallize with a rock-salt structure (space group <jats:inline-formula><jats:alternatives><jats:tex-math>Fm{{3}}m</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>F</mml:mi><mml:mi>m</mml:mi><mml:mover><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover><mml:mi>m</mml:mi></mml:mrow></mml:math></jats:alternatives></jats:inline-formula>). A significant reduction in structural defects with annealing of the samples was detected with X-ray diffraction and positron annihilation experiments. Simultaneously, only simple metallic properties without any trace of magnetic or superconducting phase transitions were observed.</jats:p>