Effect of Oxygen on the Interaction of a High-Entropy Alloy (NiFeCoCrTiAl) with Cubic Boron Nitride

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Superhard Materials Pub Date : 2026-03-04 DOI:10.3103/S1063457626010181

O. A. Shcheretskyi, V. O. Shcheretskyi, D. A. Stratiichuk, V. Z. Turkevych, A. S. Osipov

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Abstract

Some thermodynamic aspects of interaction between Ni–Fe–Co–Cr–Ti–Al high-entropy alloys (HEAs) and cubic boron nitride (cBN) at high temperatures in a medium with and without oxygen are studied. CALPHAD modeling with literature data are used to estimate the temperature dependence of change in the Gibbs energy for the formation of nitrides, borides, and oxides. It is shown that the presence of oxygen essentially changes thermodynamic conditions for the reactions, in particularly, decreases the probability of direct interaction between Ti, Al, and cBN due to the formation of oxide phases. Comparative analysis with reactions of pure metals indicates that Ti and Al in the composition of HEAs have a low activity to agree with CALPHAD calculation results. Experimental high-temperature studied performed by using the method of synchronous thermal analysis fully confirm thermodynamic calculations. The obtained results can be used to develop the compositions of high-entropy alloys for application in cBN based composite materials.

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氧对高熵合金（NiFeCoCrTiAl）与立方氮化硼相互作用的影响

研究了Ni-Fe-Co-Cr-Ti-Al高熵合金（HEAs）与立方氮化硼（cBN）在有氧和无氧介质中高温相互作用的热力学问题。CALPHAD模型与文献数据被用来估计温度依赖于变化的吉布斯能量为氮化物，硼化物和氧化物的形成。结果表明，氧的存在从根本上改变了反应的热力学条件，特别是由于氧化相的形成，降低了Ti、Al和cBN之间直接相互作用的可能性。与纯金属反应的对比分析表明，组成HEAs的Ti和Al具有较低的活度，与CALPHAD计算结果一致。采用同步热分析方法进行的实验高温研究充分证实了热力学计算。所得结果可用于开发用于cBN基复合材料的高熵合金成分。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Superhard Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.80

自引率

66.70%

发文量

审稿时长

2 months

期刊介绍： Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.