A measurement system of high-temperature oxidation environment with ultrasonic Ir 0.6 Rth 0.4 alloy thermometry

Wei, Yanlong; Wang, Gao; Gao, Yubin; Liu, Zhengguang; Xu, Lin; Tian, Miao; Yuan, Dongfang; Ren, Haiping; Zhou, Hanchang; Lu, Yang; Shi, Xueshun; Xiao, Zhaoqian

doi:10.1016/j.ultras.2018.04.001

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Alloys such as steels and bronze have traditionally been applied in engineering applications due to their significantly improved physical and chemical properties as compared to their monometallic counterparts. Many of these applications focus on properties such as high oxidation and corrosion resistance 1 , 2 , superior wear and fatigue resistance 3 , high thermal stability 1 , 4 and excellent electrocatalytic ability 5 , 6 . Recently, modern alloys have found new applications in industries like biomedical, aerospace industries and energy conversion and storage applications 7 , 8 .…”

Section: Introductionmentioning

confidence: 99%

Noble metal alloy thin films by atomic layer deposition and rapid Joule heating

Guo

Zou

Cheng

et al. 2022

Sci Rep

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Metal alloys are usually fabricated by melting constituent metals together or sintering metal alloy particles made by high energy ball milling (mechanical alloying). All these methods only allow for bulk alloys to be formed. This manuscript details a new method of fabricating Rhodium–Iridium (Rh–Ir) metal alloy films using atomic layer deposition (ALD) and rapid Joule heating induced alloying that gives functional thin film alloys, enabling conformal thin films with high aspect ratios on 3D nanostructured substrate. In this work, ALD was used to deposit Rh thin film on an Al2O3 substrate, followed by an Ir overlayer on top of the Rh film. The multilayered structure was then alloyed/sintered using rapid Joule heating. We can precisely control the thickness of the resultant alloy films down to the atomic scale. The Rh–Ir alloy thin films were characterized using scanning and transmission electron microscopy (SEM/TEM) and energy dispersive spectroscopy (EDS) to study their microstructural characteristics which showed the morphology difference before and after rapid Joule heating and confirmed the interdiffusion between Rh and Ir during rapid Joule heating. The diffraction peak shift was observed by Grazing-incidence X-ray diffraction (GIXRD) indicating the formation of Rh–Ir thin film alloys after rapid Joule heating. X-ray photoelectron spectroscopy (XPS) was also carried out and implied the formation of Rh–Ir alloy. Molecular dynamics simulation experiments of Rh–Ir alloys using Large-Scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) were performed to elucidate the alloying mechanism during the rapid heating process, corroborating the experimental results.

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Section: Introductionmentioning

confidence: 99%

Noble metal alloy thin films by atomic layer deposition and rapid Joule heating

Guo

Zou

Cheng

et al. 2022

Sci Rep

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“…Recently, Liao et al [ 4 ] used dry-coupled waveguide transducers for the long-term monitoring of mechanical parts in high temperature environments. Wei et al [ 5 ] designed an ultrasonic system for ultra-high temperature measurements using materials with a very high melting point as the delay line. Waveguides can also be used to make simultaneous measurements of several material properties.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Measurements of Temperature and Viscosity for Viscous Fluids Using an Ultrasonic Waveguide

Huang

Cegla

Wickenden³

et al. 2021

Sensors

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The characterisation and monitoring of viscous fluids have many important applications. This paper reports a refined ‘dipstick’ method for ultrasonic measurement of the properties of viscous fluids. The presented method is based on the comparison of measurements of the ultrasonic properties of a waveguide that is immersed in a viscous liquid with the properties when it is immersed in a reference liquid. We can simultaneously determine the temperature and viscosity of a fluid based on the changes in the velocity and attenuation of the elastic shear waves in the waveguide. Attenuation is mainly dependent on the viscosity of the fluid that the waveguide is immersed in and the speed of the wave mainly depends on the surrounding fluid temperature. However, there is a small interdependency since the mass of the entrained viscous liquid adds to the inertia of the system and slows down the wave. The presented measurements have unprecedented precision so that the change due to the added viscous fluid mass becomes important and we propose a method to model such a ‘viscous effect’ on the wave propagation velocity. Furthermore, an algorithm to correct the velocity measurements is presented. With the proposed correction algorithm, the experimental results for kinematic viscosity and temperature show excellent agreement with measurements from a highly precise in-lab viscometer and a commercial resistance temperature detector (RTD) respectively. The measurement repeatability of the presented method is better than 2.0% in viscosity and 0.5% in temperature in the range from 8 to 300 cSt viscosity and 40 to 90 °C temperature.

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“…Many of these applications focus on properties such as high oxidation and corrosion resistance 1,2 , superior wear and fatigue resistance 3 , high thermal stability 1,4 and excellent electrocatalytic ability 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Noble Metal Alloy Thin Films by Atomic Layer Deposition & Rapid Joule Heating

Guo¹,

Zou²,

Cheng³

et al. 2021

Preprint

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Metal alloys are usually fabricated by melting constituent metals together or sintering metal alloy particles made by high energy ball milling (mechanical alloying). All these methods only allow for bulk alloys to be formed. This manuscript details a new method of fabricating Rhodium/Iridium (Rh/Ir) metal alloy films using atomic layer deposition (ALD) and rapid Joule heating induced alloying that gives functional thin film alloys, enabling conformal thin films with high aspect ratios on 3D nanostructured substrate. In this work, ALD was used to deposit Rh thin film on an Al2O3 substrate, followed by an Ir overlayer on top of the Rh film. The multilayered structure was then alloyed / sintered using rapid Joule heating. We can precisely control the thickness of the resultant alloy films down to the atomic scale. The Rh@Ir alloy thin films were characterized using scanning and transmission electron microscopy (SEM/TEM) and energy dispersive spectroscopy (EDS) to study their microstructural characteristics. Grazing-incidence X-ray diffraction (GIXRD) and X-ray photoelectron spectroscopy (XPS) were also carried out to confirm the composition and formation of Rh-Ir thin film alloys. All the characterization results reveal that the Rh-Ir alloy thin film was prepared successfully with one single phase and homogeneous distribution of Rh and Ir throughout the film. Molecular Dynamics simulation experiments of Rh/Ir alloys using Large-Scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) were performed to elucidate the alloying mechanism during the rapid heating process, corroborating the experimental results.

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A measurement system of high-temperature oxidation environment with ultrasonic Ir 0.6 Rth 0.4 alloy thermometry

Cited by 4 publications

References 13 publications

Noble metal alloy thin films by atomic layer deposition and rapid Joule heating

Noble metal alloy thin films by atomic layer deposition and rapid Joule heating

Simultaneous Measurements of Temperature and Viscosity for Viscous Fluids Using an Ultrasonic Waveguide

Noble Metal Alloy Thin Films by Atomic Layer Deposition & Rapid Joule Heating

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A measurement system of high-temperature oxidation environment with ultrasonic Ir 0.6 Rth 0.4 alloy thermometry

Cited by 4 publications

References 13 publications

Noble metal alloy thin films by atomic layer deposition and rapid Joule heating

Noble metal alloy thin films by atomic layer deposition and rapid Joule heating

Simultaneous Measurements of Temperature and Viscosity for Viscous Fluids Using an Ultrasonic Waveguide

Noble Metal Alloy Thin Films by Atomic Layer Deposition &amp; Rapid Joule Heating

Contact Info

Product

Resources

About

Noble Metal Alloy Thin Films by Atomic Layer Deposition & Rapid Joule Heating