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On the synthesis and characterisation of novel composite-structured high-entropy alloys

机译:关于新型复合材料结构高熵合金的合成与表征

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摘要

A study of novel composite-structured CoCrFeNi3Si, CoCrFe2Ni2Si and Co2CrFeNi2Si high-entropy alloys, synthesised by vacuum arc melting, is presented. The designing criteria for the formation of such alloys were based on the enthalpy of mixing and the valence electron concentration. X-ray diffraction analysis revealed that all the alloys were composed of face-centered cubic and intermetallic phases. Scanning electron microscopy, along with elemental analysis, indicated that the face-centered cubic phase mainly contains Co, Cr, Fe and Ni, whereas, the intermetallic compound is Ni-Si rich. All the synthesised high-entropy alloys in the present investigation possess excellent compressive strength along with ductility at room temperature, suggesting significant potential application in the engineering field. Furthermore, enhanced hardness, wear resistance and corrosion resistance were achieved in all the designed high-entropy alloys. The previously given design parameters for the composite-structured high-entropy alloys are in good accord with the current research work.
机译:提出了一种新型复合结构COCRFENI3SI,COCRFE2SI和CO2CRFENI2SI高熵合金,通过真空熔融合成。形成这种合金的设计标准基于混合的焓和价电子浓度。 X射线衍射分析表明,所有合金都由面为中心的立方和金属间相组成。扫描电子显微镜以及元素分析表明,以脸部为中心的立方相,主要含有CO,Cr,Fe和Ni,而金属间化合物是Ni-Si富含。本研究中的所有合成的高熵合金具有优异的抗压强度以及室温下的延展性,表明工程领域的显着潜在应用。此外,在所有设计的高熵合金中实现了增强的硬度,耐磨性和耐腐蚀性。先前给出的复合结构高熵合金的设计参数符合目前的研究工作良好。

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