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Matin Amani - One of the best experts on this subject based on the ideXlab platform.
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thin film Thermocouples based on the system in2o3 sno2
Journal of the American Ceramic Society, 2011Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing thermocouple of all compositions studied.
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Thermoelectric Properties of ZnxInyOx + 1.5y Films
Journal of The Electrochemical Society, 2011Co-Authors: Otto J. Gregory, Matin AmaniAbstract:Ceramic thin film Thermocouples are being developed to replace noble metal Thermocouples operating within the harsh environments of advanced turbine engines used for power generation and propulsion. Seebeck coefficients as large as 158 μV/°C were determined for indium oxide (In 2 O 3 ) at 950°C and 256 μV/°C for zinc oxide (ZnO) at 1250°C relative to platinum reference electrodes. Because these Seebeck coefficients are appreciably larger than those for metallic Thermocouples, alloys in the system indium zinc oxide (Zn x In y O x+1.5y ) were investigated by cosputtering from high purity ZnO and In 2 O 3 targets. Thermocouple libraries were patterned with platinum reference electrodes and rapidly screened using combinatorial chemistry techniques. Thermoelectric response, power, and resistivity were determined for each thermocouple in the library. Thermocouples with the optimum compositions were prepared and the resulting power factor of the biceramic junctions was determined from 75 to 650°C.
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Thin‐Film Thermocouples Based on the System In2O3–SnO2
Journal of the American Ceramic Society, 2010Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing thermocouple of all compositions studied.
Otto J. Gregory - One of the best experts on this subject based on the ideXlab platform.
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Diffusion barrier coatings for CMC Thermocouples
Surface and Coatings Technology, 2018Co-Authors: Kevin Rivera, Matthew Ricci, Otto J. GregoryAbstract:Abstract A platinum:silicon carbide thermocouple has been developed to measure the surface temperature of ceramic matrix composites (CMC) with high resolution. Platinum was deposited by rf sputtering onto a SiC-SiC CMC substrates coated with a dielectric, such that the SiC-SiC CMC was one thermoelement and the platinum film was another thermoelement comprising the Pt:SiC(CMC) thermocouple. The purpose of the dielectric was to electrically isolate the platinum leads from the SiC-SiC CMC. The thermoelectric output, hysteresis and drift of the Pt:SiC(CMC) Thermocouples were measured at temperatures ranging from 600 °C to 1000 °C. The thermoelectric powers generated by the Pt:SiC Thermocouples were an order in magnitude greater than conventional Pt:Pd or Type K Thermocouples. Thermoelectric powers as large as 250 μV/K were reported for these Thermocouples, as compared to thermoelectric powers of 10 μV/K reported for Pt:Pd and Type K Thermocouples. The results presented within show that the Pt:SiC(CMC) Thermocouples exhibit excellent stability at high temperatures, relatively low drift rates, and little hysteresis during thermal cycling. However, the Pt:SiC junctions were prone to oxidation effects as well as the formation of platinum silicides at high temperature, which can compromise the junction and lead to excessive drift. Therefore, a number of diffusion barrier coatings were applied to the Pt:SiC junctions in an attempt to improve stability and lower drift in this promising new class of Thermocouples.
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thin film Thermocouples based on the system in2o3 sno2
Journal of the American Ceramic Society, 2011Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing thermocouple of all compositions studied.
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Thermoelectric Properties of ZnxInyOx + 1.5y Films
Journal of The Electrochemical Society, 2011Co-Authors: Otto J. Gregory, Matin AmaniAbstract:Ceramic thin film Thermocouples are being developed to replace noble metal Thermocouples operating within the harsh environments of advanced turbine engines used for power generation and propulsion. Seebeck coefficients as large as 158 μV/°C were determined for indium oxide (In 2 O 3 ) at 950°C and 256 μV/°C for zinc oxide (ZnO) at 1250°C relative to platinum reference electrodes. Because these Seebeck coefficients are appreciably larger than those for metallic Thermocouples, alloys in the system indium zinc oxide (Zn x In y O x+1.5y ) were investigated by cosputtering from high purity ZnO and In 2 O 3 targets. Thermocouple libraries were patterned with platinum reference electrodes and rapidly screened using combinatorial chemistry techniques. Thermoelectric response, power, and resistivity were determined for each thermocouple in the library. Thermocouples with the optimum compositions were prepared and the resulting power factor of the biceramic junctions was determined from 75 to 650°C.
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Thin‐Film Thermocouples Based on the System In2O3–SnO2
Journal of the American Ceramic Society, 2010Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing thermocouple of all compositions studied.
Ximing Chen - One of the best experts on this subject based on the ideXlab platform.
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thin film Thermocouples based on the system in2o3 sno2
Journal of the American Ceramic Society, 2011Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing thermocouple of all compositions studied.
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Thin‐Film Thermocouples Based on the System In2O3–SnO2
Journal of the American Ceramic Society, 2010Co-Authors: Ximing Chen, Otto J. Gregory, Matin AmaniAbstract:Ceramic Thermocouples are being developed to replace noble-metal Thermocouples that are unable to withstand the harsh environments inside the hot sections of turbine engines used for power generation and propulsion. A number of alloys in the system indium oxide (In2O3):tin oxide (SnO2) were systematically investigated as Thermocouples. Specifically, solid solutions containing up to 10 wt% SnO2 were initially tested relative to a platinum reference electrode and the resulting thermoelectric properties were measured. The results indicated that the thermoelectric response was dependent on the SnO2 content in the alloy. Seebeck coefficients ranged from 53 to 224 μV/°C at temperatures up to 1300°C, which are considerably larger than those generated from metal Thermocouples. Bi-ceramic Thermocouples based on selected solid solutions of indium tin oxide (ITO) exhibited high temperature stability and Seebeck coefficient on the order of 160 μV/°C. Postdeposition treatments had a significant effect on the stability of the ceramic Thermocouples. High-temperature annealing improved the film uniformity, stability, and reproducibility of the ITO thin-film Thermocouples. A bi-ceramic thermocouple consisting of In2O3 and In2O3:SnO2 (95:5 wt%) was the best-performing thermocouple of all compositions studied.
Qiyong Zeng - One of the best experts on this subject based on the ideXlab platform.
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magnetron sputtering of nicr nisi thin film thermocouple sensor for temperature measurement when machining chemical explosive material
Key Engineering Materials, 2011Co-Authors: Qiyong Zeng, Tao Hong, Le ChenAbstract:Temperature plays a vital role in the machining industry today. A Nickel-Chrome versus Nickel-Silicon thin-film thermocouple system has been established for measuring instantaneous workpiece temperature in chemical explosive material machining. The NiCr/NiSi thin-film Thermocouples have been deposited inside high speed steel cutters by magnetron sputtering. The typical deposition conditions are summarized. Static and dynamic calibrations of the NiCr/NiSi thin-film Thermocouples are presented. The Seebeck coefficient of the TFTC is 40.4 μV/°C which is almost the same as that of NiCr/NiSi wire thermocouple. The response time is about 0.42ms. The testing results indicate that the developed NiCr/NiSi thin-film thermocouple sensors can respond fast enough to catch the very short temperature pulse and perform excellently when machining chemical explosive material in situ.
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a new fabrication method of nicr nisi thin film thermocouple sensor for workpiece temperature measurement in chemical explosive material machining
World Congress on Intelligent Control and Automation, 2006Co-Authors: Qiyong Zeng, Xinlu Deng, Jun XuAbstract:With increasing cutting speeds being used in machining operations, the thermal aspects of cutting have become more important. A new fabrication method of Nickel-Chrome versus Nickel-Silicon thin-film thermocouple — rf magnetron sputtering is presented. The thin film Thermocouples have been directly deposited inside high speed steel cutters and the thickness of the thermocouple junction is only 1.6 μ m. The great efforts of this article are devoted to the comparison study between this kind of fabrication method and Multiple Arc Ion Plating method introduced in the authors' former work. Static and dynamic calibrations of the NiCr/NiSi thin-film Thermocouples are also presented. It is concluded that, comparing to Ion plating method, the compositions of the thermocouple thin films deposited by rf magnetron sputtering are closer to those of the alloy targets; the Seebeck coefficient of the thin-film Thermocouples are closer to those of standard K-type wire Thermocouples; And the thin film thermocouple can respond faster.
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development of nicr nisi thin film thermocouple sensor for workpiece temperature measurement in chemical explosive material machining
Journal of Manufacturing Science and Engineering-transactions of The Asme, 2006Co-Authors: Qiyong Zeng, Jing Xu, Xinlu Deng, Jun XuAbstract:Temperature plays a vital role in the machining industry today. With increasing cutting speeds being used in machining operations, the thermal aspects of cutting have become more important. A nickel-chrome versus nickel-silicon thin-film thermocouple system has been established for measuring instantaneous workpiece temperature in chemical explosive material machining. The thin-film Thermocouples have been directly deposited inside high-speed steel cutters by means of multiple arc ion plating and the thickness of the thermocouple junction is only a few micrometers. The research effort has been concentrated on developing solutions to the insulating problem between the thin-film Thermocouples and the high-speed steel cutters. SiO 2 insulating films have been deposited on the high-speed steel substrates by microwave electron cyclotron resonance plasma source enhanced radiofrequency (rf) reactive magnetron sputtering. Static and dynamic calibrations of the NiCr/NiSi thin-film Thermocouples are presented. The results of the testing indicate that the thin-film Thermocouples have good linearity, little response time, and perform excellently when machining in situ.
Jun Xu - One of the best experts on this subject based on the ideXlab platform.
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a new fabrication method of nicr nisi thin film thermocouple sensor for workpiece temperature measurement in chemical explosive material machining
World Congress on Intelligent Control and Automation, 2006Co-Authors: Qiyong Zeng, Xinlu Deng, Jun XuAbstract:With increasing cutting speeds being used in machining operations, the thermal aspects of cutting have become more important. A new fabrication method of Nickel-Chrome versus Nickel-Silicon thin-film thermocouple — rf magnetron sputtering is presented. The thin film Thermocouples have been directly deposited inside high speed steel cutters and the thickness of the thermocouple junction is only 1.6 μ m. The great efforts of this article are devoted to the comparison study between this kind of fabrication method and Multiple Arc Ion Plating method introduced in the authors' former work. Static and dynamic calibrations of the NiCr/NiSi thin-film Thermocouples are also presented. It is concluded that, comparing to Ion plating method, the compositions of the thermocouple thin films deposited by rf magnetron sputtering are closer to those of the alloy targets; the Seebeck coefficient of the thin-film Thermocouples are closer to those of standard K-type wire Thermocouples; And the thin film thermocouple can respond faster.
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development of nicr nisi thin film thermocouple sensor for workpiece temperature measurement in chemical explosive material machining
Journal of Manufacturing Science and Engineering-transactions of The Asme, 2006Co-Authors: Qiyong Zeng, Jing Xu, Xinlu Deng, Jun XuAbstract:Temperature plays a vital role in the machining industry today. With increasing cutting speeds being used in machining operations, the thermal aspects of cutting have become more important. A nickel-chrome versus nickel-silicon thin-film thermocouple system has been established for measuring instantaneous workpiece temperature in chemical explosive material machining. The thin-film Thermocouples have been directly deposited inside high-speed steel cutters by means of multiple arc ion plating and the thickness of the thermocouple junction is only a few micrometers. The research effort has been concentrated on developing solutions to the insulating problem between the thin-film Thermocouples and the high-speed steel cutters. SiO 2 insulating films have been deposited on the high-speed steel substrates by microwave electron cyclotron resonance plasma source enhanced radiofrequency (rf) reactive magnetron sputtering. Static and dynamic calibrations of the NiCr/NiSi thin-film Thermocouples are presented. The results of the testing indicate that the thin-film Thermocouples have good linearity, little response time, and perform excellently when machining in situ.
