Impact of nuclear reactor radiation on the performance of AlN/sapphire surface acoustic wave devices

Wang, Y.; Guo, Sha; Harlow, Cole; Yazbeck, Maha; Khafizov, Marat

doi:10.1016/j.nimb.2020.08.018

Cited by 11 publications

(4 citation statements)

References 46 publications

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“…Most postirradiation measurements are not able to capture this supersaturated state, as by the time the ex situ characterization is done a different distribution of point defects is probed. Evidence for this effect has been demonstrated in several recent in situ measurements of various properties, including thermal conductivity, , elastic properties, − vibrational spectra observed using Raman spectroscopy and optical properties. , Similar approaches can be applied to the material systems considered in this review.…”

Section: Discussionmentioning

confidence: 80%

Thermal Energy Transport in Oxide Nuclear Fuel

et al. 2021

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To efficiently capture the energy of the nuclear bond, advanced nuclear reactor concepts seek solid fuels that must withstand unprecedented temperature and radiation extremes. In these advanced fuels, thermal energy transport under irradiation is directly related to reactor performance as well as reactor safety. The science of thermal transport in nuclear fuel is a grand challenge due to both computational and experimental complexities. Here, we provide a comprehensive review of thermal transport research on two actinide oxides: one currently in use in commercial nuclear reactors, uranium dioxide (UO2), and one advanced fuel candidate material, thorium dioxide (ThO2). In both materials, 5Concluding Remarks .

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Section: Discussionmentioning

confidence: 80%

Thermal Energy Transport in Oxide Nuclear Fuel

et al. 2021

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“…For the past few years, with the rapid development of nanomaterials such as graphene and carbon nanotubes (CNTs) [4], nano-Al-based composite materials [5][6][7] have received widespread attention from materials scientists. In addition, some nanomaterials such as AlN are also very important for nuclear fusion technology [8]. Some researchers have shown that the size of the reinforcing phase is one of the major aspects affecting mechanical properties of composites [9].…”

Section: Introductionmentioning

confidence: 99%

Dispersion and Preparation of Nano-AlN/AA6061 Composites by Pressure Infiltration Method

Sun

Zhu²,

Zhang³

et al. 2022

Nanomaterials

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Nanomaterials play an important role in metal matrix composites (MMC). In this study, 3.0 wt.%, 6.0 wt.%, and 9.0 wt.% nano-AlN-particles-reinforced AA6061 (nano-AlN/AA6061) composites were successfully prepared by pressure infiltration technique and then hot extruded (HE) at 500 °C. The microstructural characterization of the composites after HE show that the grain structure of the Al matrix is significantly refined, varying from 2 to 20 μm down to 1 to 3 μm. Nano-AlN particles in the composites are agglomerated around the matrix, and the distribution of nano-AlN is improved after HE. The interface between AA6061 and nano-AlN is clean and smooth, without interface reaction products. The 3.0 wt.% nano-AlN/AA6061 composite shows an uppermost yield and supreme tensile strength of 333 MPa and 445 MPa, respectively. The results show that the deformation procedure of the composite is beneficial to the further dispersion of nano-AlN particles and improves the strength of nano-AlN/AA6061 composite. At the same time, the strengthening mechanism active in the composites was discussed.

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“…Besides being used in SAW devices associated with good piezoelectric coupling, AlN has high acoustic velocity and good thermal and chemical stability. It was also demonstrated that SAW-based AlN/Sapphire structure can operate under irradiation inside a nuclear reactor [14]. This AlN epitaxial layer is deposited by MOCVD technique on a c-axis sapphire substrate.…”

Section: Introductionmentioning

confidence: 99%

“…Although AlN monocrystalline films are the ideal option for this application, it has been shown that preferentially oriented polycrystalline films can achieve adequate performance as well. Hence, AlN/Sapphire is a promising solution as a piezoelectric structure for high temperature SAW applications [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Electrical Characterization of a Bilayer Pt/AlN/Sapphire One Port Resonator for Sensor Applications

et al. 2021

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This paper presents a two-dimensional FEM (Finite Element Method) modeling and simulation of a surface acoustic wave (SAW) resonator based on a layered Pt/AlN/Sapphire structure. Such structure that exploits the electromechanical coupling of piezoelectric film is of high interest for harsh environments. By harsh environment we mean any environment that could hinder the operation of the device. Hardness can come from a variety of sources, and examples include the following: High pressure, High temperature, Shock/high vibration, Radiation, Harsh chemicals, etc. As part of this work, we are looking for high temperature sensor applications and only operating drifts due to temperature will be studied. SAW resonator is made from piezoelectric thin film Aluminum Nitride (AlN) layer on Sapphire substrate. Modal analysis is used to determine the eigen mode and the eigenfrequency of the system and the study of the frequency domain is used to determine the response of the model under influence of a harmonic excitation for one or more frequencies. In the FEM modeling, various parameters of the surface waves in the films, such as the surface velocity, the displacement of the piezoelectric thin film, the electrical potential, the electromechanical coefficient (k2), and the quality factor (Q) were studied. A comparative study between modeled and experimental curves showed a good agreement and allowed to validate our simulation method. Finally, a FEM study of the influence of normalized thickness of AlN thin film on resonator performances was carried out and compared with theorical results of literature.

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Impact of nuclear reactor radiation on the performance of AlN/sapphire surface acoustic wave devices

Cited by 11 publications

References 46 publications

Thermal Energy Transport in Oxide Nuclear Fuel

Thermal Energy Transport in Oxide Nuclear Fuel

Dispersion and Preparation of Nano-AlN/AA6061 Composites by Pressure Infiltration Method

Modeling and Electrical Characterization of a Bilayer Pt/AlN/Sapphire One Port Resonator for Sensor Applications

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