Research and Implementation of a 1800°C Sapphire Ultrasonic Thermometer

Liang, Haijian; Yang, Fengbao; Lu, Yang; Liu, Zhengguang; Wang, Gao; Wei, Yanlong; Xue, Hongxin

doi:10.1155/2017/9710763

Cited by 12 publications

(5 citation statements)

References 29 publications

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“…A long period (6 h) and high temperature (> 1600 °C) measurement with a V-T fit of 0.998 ± 0.001 was achieved using a sapphire ultrasonic temperature sensor. This sapphire ultrasonic temperature sensor avoided the influence of stray light in high temperature measurements and overcame the temperature limit (> 600 °C) of black body sensors [77].…”

Section: Single Crystal Fiber Sensormentioning

confidence: 99%

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Single Crystal Fibers: Diversified Functional Crystal Material

Wang

Zhang

et al. 2019

Adv. Fiber Mater.

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Single crystal fibers (SCF) are considered to be a combination of bulk crystals and conventional fibers, thereby possessing the stable physical and chemical properties accompanied with excellent waveguide properties. This paper gives a detailed introduction to the development history of single crystal fibers, including the evolution of the growth technique and the optimization of the growth process. Laser-heated pedestal growth (LHPG) and Micro-pulling-down (μ-PD) methods are considered to be the most widely used growth techniques for growing single crystal fibers, and the advantages of the two methods are also introduced in detail. The second part of this paper describes the characterization of single crystal fibers, including diameter fluctuation, crystal quality and optical losses. A series of cladding approaches for SCF, such as magnetron sputtering, sol-gel, liquid phase epitaxy, co-drawing LHPG, ion implantation and micro-structure cladding will be reviewed. In addition, the research status of single crystal fiber laser and single crystal fiber sensor are also summarized in view of the current research foundation.

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Section: Single Crystal Fiber Sensormentioning

confidence: 99%

mentioning

confidence: 99%

Single Crystal Fibers: Diversified Functional Crystal Material

Wang

Zhang

et al. 2019

Adv. Fiber Mater.

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“…Furthermore, a remote sensing structure can be used to guide the ultrasonic wave out from an environment that is over 1100 Celsius and subsequently detect it by using PSFBG [ 100 ]. By further incorporating FBG with other techniques such as sapphire fiber [ 147 ], FBG can possibly detect ultrasonic signals in temperatures over 1800 Celsius, which will have a significant impact on the aerospace industry.…”

Section: Future Trendsmentioning

confidence: 99%

Ultrasonic Structural Health Monitoring Using Fiber Bragg Grating

Okabe

2018

Sensors

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The fiber Bragg grating (FBG) sensor, which was developed over recent decades, has been widely used to measure manifold static measurands in a variety of industrial sectors. Multiple experiments have demonstrated its ability in ultrasonic detection and its potential in ultrasonic structural health monitoring. Unlike static measurements, ultrasonic detection requires a higher sensitivity and broader bandwidth to ensure the fidelity of the ultrasonic Lamb wave that propagates in a plate-like structure for the subsequent waveform analysis. Thus, the FBG sensor head and its corresponding demodulation system need to be carefully designed, and other practical issues, such as the installation methods and data process methods, should also be properly addressed. In this review, the mature techniques of FBG-based ultrasonic sensors and their practical applications in ultrasonic structural health monitoring are discussed. In addition, state-of-the-art techniques are introduced to fully present the current developments.

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“…Corrosion in high-temperature melts is influenced by various factors such as melting, dissolution, and chemical reactions. The corrosion pattern will undergo modifications based on variations in the temperature of the metal melt, the types of solid/liquid metals, and the external environment [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Study on chemical corrosion properties of titanium alloy in 2A14 aluminum melt

Yang,

Zhang,

Liu

et al. 2023

Mater. Res. Express

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Titanium alloy radiation rods have excellent physical and chemical properties compared to other materials, and are commonly used for ultrasonic casting of 2A14 aluminum alloy. However, titanium alloys are chemically corroded in high-temperature aluminum melts for a long time, making it difficult to precisely regulate the elemental composition during casting. In order to better understand the high-temperature chemical corrosion mechanism of titanium alloy radiation rods, this research looks into the corrosion morphology, weight loss, surface roughness, and reaction layer. The study's findings suggest that the rate of chemical corrosion of titanium alloy in high-temperature aluminum melt is often inversely correlated with the degree of roughness, with the degree of roughness changing nonlinearly during the corrosion process. Titanium alloy weight loss rates with roughness Ra0.4μm, Ra7.2μm, Ra9.5μm and Ra9.8μm are 0.16mg per minute, 0.25mg per minute, 0.37mg per minute and 0.29mg per minute, respectively. The corrosion product of the chemical corrosion process is TiAl3, which is granular. Under varying roughness conditions, the solid-liquid interface of Al/Ti emerges reactants after 4 minutes, and the TiAl3 reaction layer arises after 12 minutes. Furthermore, the reaction layer with little roughness is flat and compact, whereas the reaction layer with great roughness is loose and contains many faults. At the same time, the growth rate of the reaction layer decreases slightly. And the greater the surface roughness, the greater the TiAl3 reaction layer grows at the titanium alloy matrix.

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Research and Implementation of a 1800°C Sapphire Ultrasonic Thermometer

Cited by 12 publications

References 29 publications

Single Crystal Fibers: Diversified Functional Crystal Material

Single Crystal Fibers: Diversified Functional Crystal Material

Ultrasonic Structural Health Monitoring Using Fiber Bragg Grating

Study on chemical corrosion properties of titanium alloy in 2A14 aluminum melt

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