Characterization of (HfTiZrTaM)B2 (M=Mn/Mo/W/Cr) high entropy diboride ceramics with five/six components prepared via powder metallurgy

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2025-03-07 DOI:10.1016/j.solidstatesciences.2025.107898

İlayda Süzer , Esin Aysel , Kübra Gürcan Bayrak , Sıddıka Mertdinç-Ülküseven , Duygu Ağaoğulları

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引用次数: 0

Abstract

This study shows the possibility of synthesizing five/six constituent high entropy (HfTiZrTaM)B₂ (M=Mn/Mo/W/Cr) diboride ceramics via mechanical alloying (MA) assisted spark plasma sintering (SPS). Firstly, metal borides as starting materials were synthesized in-house via mechanochemical synthesis (MCS) and leaching using optimum conditions. Secondly, metal borides were mixed in equimolar ratios to consist of five or six components, and then MA was used to hybridize the mixture for 6 h. SPS (2000 °C, 30 MPa) was used to convert the hybridized powders into densified structures. The compositional, microstructural, physical, mechanical and thermal analyses were conducted. Based on the results, the main HEB phase and low amount of (Hf, Zr) oxides were detected. Also, there was a secondary phase in the (HfTiZrTaCrW)B₂ composition. Approximately 8.19 g/cm³ and 6.72 g/cm³ were found as the highest and the lowest Archimedes’ densities for the (HfTiZrTaCrW)B₂ and (HfTiZrTaCrMo)B₂ samples, respectively. (HfTiZrTaCrMn)B₂ had the lowest hardness value nearly 22 GPa, and (HfTiZrTaCrW)B₂ had the highest hardness value at about 24 GPa. (HfTiZrTaCrW)B₂ had the highest wear rate (∼6.85x10⁻⁶ mm³/Nm), and (HfTiZrTaCrMo)B₂ had the lowest wear rate (∼5.95x10⁻⁷ mm³/Nm). Based on the thermal tests, the highest weight gain up to 1100 °C was found for the (HfTiZrTaCrMn)B₂ sample

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.