辐照损伤对四元和高熵过渡金属二硼化物硬度和弹性特性的影响

IF 2.7 3区 物理与天体物理 Q2 PHYSICS, APPLIED Journal of Applied Physics Pub Date : 2024-09-11 DOI:10.1063/5.0206224
Amey Khanolkar, Amit Datye, Yan Zhang, Cody A. Dennett, Weiming Guo, Yang Liu, William J. Weber, Hua-Tay Lin, Yanwen Zhang
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引用次数: 0

摘要

多主成分过渡金属(TM)二硼化物是一类高熵陶瓷(HECs),由于其在极端环境应用(包括热/环境屏障、高超音速飞行器、涡轮发动机和下一代核反应堆)中具有良好的性能,近年来受到了广泛关注。虽然通过阳离子亚晶格上 TM 元素的随机分布增加化学无序性为定制弹性刚度和硬度提供了机会,但辐照引起的结构损伤对这些复杂材料物理性质的影响在很大程度上仍未得到探索。为此,我们通过激光产生的表面声波(SAW)色散和纳米压痕测量,分别研究了高熵 TM 二硼化物(Hf0.2Nb0.2Ta0.2Ti0.2Zr0.2)B2 及其三个四元子集在 10 MeV 金(Au)离子以高达 6 × 1015 Au cm-2 的通量辐照后在微米和亚微米长度尺度上的硬度和弹性模量变化。纳米压痕测量结果表明,TM 二硼化物在受到高能金离子辐照后,最初的硬度会有所提高,而在进一步辐照后,硬度会随之降低。其中一种四元成分 (Hf1/3Ta1/3Ti1/3)B2 的趋势明显例外,其硬度继续随着离子辐照通量的增加而增加。虽然通过测量声表面波色散和纳米压痕获得的有效弹性模量的绝对值存在差异(并归因于测量长度尺度上的微观结构变化),但这两种技术都得出了类似的趋势,即随着离子辐照通量的增加,弹性模量最初降低,随后达到饱和。四元 TM 二硼化物(Hf1/3Ta1/3Ti1/3)B2 再次偏离了这一趋势。高熵 TM 二硼化物(Hf0.2Nb0.2Ta0.2Ti0.2Zr0.2)B2 在低辐照度下发生初始变化后,辐照到高离子辐照度时硬度和模量的恢复程度最大,这表明它比四元TM 二硼化物具有更强的抗辐射损伤能力。本文讨论了通过调整晶格中的化学无序性和键特性,设计出具有更高硬度和模量以增强抗辐射能力(与单一成分的同类产品相比)的 HECs 的可能性。
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Effects of irradiation damage on the hardness and elastic properties of quaternary and high entropy transition metal diborides
Multi-principal component transition metal (TM) diborides represent a class of high-entropy ceramics (HECs) that have received considerable interest in recent years owing to their promising properties for extreme environment applications that include thermal/ environmental barriers, hypersonic vehicles, turbine engines, and next-generation nuclear reactors. While the addition of chemical disorder through the random distribution of TM elements on the cation sublattice has offered opportunities to tailor elastic stiffness and hardness, the effects of irradiation-induced structural damage on the physical properties of these complex materials have remained largely unexplored. To this end, changes in the hardness and elastic moduli of a high-entropy TM diboride (Hf0.2Nb0.2Ta0.2Ti0.2Zr0.2)B2 and three of its quaternary subsets following irradiation with 10 MeV gold (Au) ions to fluences of up to 6 × 1015 Au cm−2 are investigated at the micrometer and sub-micrometer length-scales via the dispersion of laser-generated surface acoustic waves (SAW) and nanoindentation, respectively. The nanoindentation measurements show that the TM diborides exhibit an initial increase in hardness following irradiation with energetic Au ions, with a subsequent decrease in hardness following further irradiation. One quaternary composition, (Hf1/3Ta1/3Ti1/3)B2, exhibits a notable exception to the trend and continues to exhibit an increase in hardness with ion irradiation fluence. Although differences in the absolute values of the effective elastic moduli obtained from the measured SAW dispersion and nanoindentation are observed (and attributed to microstructural variations at the measurement length-scale), both techniques yield similar trends in the form of an initial reduction and subsequent saturation in the elastic modulus with increasing ion irradiation fluence. The quaternary TM diboride (Hf1/3Ta1/3Ti1/3)B2 again exhibits a departure from this trend. The high-entropy TM diboride (Hf0.2Nb0.2Ta0.2Ti0.2Zr0.2)B2 exhibits the greatest recovery in hardness and modulus when irradiated to high ion fluences following initial changes at low fluence, indicating superior resistance to radiation-induced damage over its quaternary counterparts. Opportunities for designing HECs with superior hardness and modulus for enhanced radiation resistance (compared to their single constituent counterparts) by tailoring chemical disorder and bond character in the lattice are discussed.
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来源期刊
Journal of Applied Physics
Journal of Applied Physics 物理-物理:应用
CiteScore
5.40
自引率
9.40%
发文量
1534
审稿时长
2.3 months
期刊介绍: The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces
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