Novel temperature sensors for SiC–SiC CMC engine components

Rivera, Kevin; Muth, Tommy; Rhoat, John; Ricci, Matt; Gregory, Otto J.

doi:10.1557/jmr.2017.216

Cited by 12 publications

(5 citation statements)

References 9 publications

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“…[1][2][3][4][5][6] They are generally derived from polycarbosilane (PCS), the precursor to SiC, via melt spinning, curing, and high-temperature pyrolysis. Therefore, given their importance as a raw material, the relationship between the molecular structure, molecular weight distribution, and spinnability of PCS is an important issue affecting the preparation of high-performance SiC bres.…”

Section: Introductionmentioning

confidence: 99%

Evolution of molecular composition of polycarbosilane and its effect on spinnability

Wang

Song

2018

RSC Adv.

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The molecular composition of polycarbosilane (PCS) and its evolution in the synthesis process, as well as the contribution of each component to the spinnability of PCS, were explored by combining distillation separation with gel permeation chromatogram peak-splitting. The results show that PCS is composed of four kinds of molecules with different structures, namely M L , M M , M H , and M SH (number-average molecular weights of 531, 1207, 2731, and 10 977, respectively). In the synthesis process, PCS changed from containing two components to three components, and finally to four components. The PCS can be spun when it is composed of M L , M M , and M H , but is not suitable for spinning when it is composed of one, two, or four components. For a PCS having three components, increasing the amount of M H and restricting M L to within a certain range can enhance the spinnability of PCS. The underlying mechanism is controlled by the linear structure of M H and its low melting point by there being an appropriate M L content, which ensures melting, de-foaming, and stability in spinning. The final optimum ratio is found to be an M H content of 30-45%, an M M content of 30-51%, and an M L content of 18-25%.

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Section: Introductionmentioning

confidence: 99%

Evolution of molecular composition of polycarbosilane and its effect on spinnability

Wang

Song

2018

RSC Adv.

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“…With the addition of the transition layer, the thermocouple service performance improved. Rivera [15] prepared a SiC/Pt TFTC with a large Seebeck coefficient, which however could only work below 1000 • C. Yakaboylu [16] deposited MoSi 2 and WSi 2 -based ceramic composite thick films on Al 2 O 3 substrates via the screen-printing technique. These films exhibited stable thermoelectric performance at 1350 • C with a peak thermoelectric voltage of 19.3 mV.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature-Sensing Smart Bolt Based on Indium Tin Oxide/In2O3 Thin-Film Thermocouples with Nickel-Based Single-Crystal Superalloy via Screen Printing

et al. 2022

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In this study, thin-film thermocouples (TFTCs) were combined with a smart bolt to design a smart bolt that can directly test high temperature in service monitoring and parameter calculation for gas turbine structure design. The first-principles calculation was used to analyze the design of the surface properties of nickel-based alloys and insulating layers, and finite element analysis was used to optimize dimension parameters by controlling the thermal stress matching of insulating layers and sensitive layers. The effect of the glass powder with different particle sizes on the microstructure of the ITO and In2O3 films was studied via SEM. The preferred particle size of the additive glass powder is 400 nm. The XRD pattern shows the (222) peak has the highest intensity. The intensities of the (222) and (622) peaks increase after the heat treatment. The calibration results show that the average Seebeck coefficient of the TFTCs can reach 64.9 μV/°C at 1100 °C with a maximum voltage of 71.4 mV. The repeatability error of the cycles of the sensor after heat treatment is ±1.05%. The repeatability of the sensor is up to 98.95%. The smart bolts were tested for application in small aero engines. It can be seen that under the impact of 1000 °C, the thermal response of the prepared smart bolt is better than that of the K-type armored thermocouple, and the thermal balance is achieved faster. The intelligent bolt sensor proposed in this work has better engineering application prospects owing to its convenience of installation in harsh environments.

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“…SiC fiber reinforced SiC matrix composites (SiC f /SiC) are the potential contenders for high temperature structural applications because of the excellent mechanical properties, low density, good thermal stability, oxidation resistance and corrosion resistance [1][2][3]. For the purpose of the high toughness for the specific technological applications, such as the rotating structure of engines, the improvement of the toughness of SiC f /SiC composites needed to be considered.…”

Section: Introductionmentioning

confidence: 99%

Toughening mechanisms of Ti3SiC2- and TiB2- toughened SiC matrix prepared via reactive melt infiltration

Zhou

Jiao

Liu

et al. 2021

Journal of Materials Research

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The SiC-Ti 3 SiC 2 -TiB 2 composites herein were prepared in situ by reactive melt infiltration (RMI). The synergy mechanism between Ti 3 SiC 2 and TiB 2 on fracture toughness of SiC matrix was investigated. The phase composition and microstructure of SiC-Ti 3 SiC 2 -TiB 2 composites were studied, and their mechanical properties, such as Vickers hardness, elastic modulus and indent fracture toughness, were compared to those of SiC ceramics and SiC-Ti 3 SiC 2 composites. The crack propagation of SiC-Ti 3 SiC 2 -TiB 2 composites was simulated via Extended Finite Element Method (XFEM), and the fracture behavior in laminated Ti 3 SiC 2 grains was also evaluated. The results show that SiC-Ti 3 SiC 2 -TiB 2 composites exhibit an indentation fracture toughness of 9.57 MPa m 1/2 , which is greatly higher than that of SiC ceramics and SiC-Ti 3 SiC 2 composites. It was suggested that the main toughening mechanisms of lamellar Ti 3 SiC 2 grains and columnar TiB 2 grains are crack deflection, crack bridging, grain fracture, delamination and grain pull-out.

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Novel temperature sensors for SiC–SiC CMC engine components

Abstract: Abstract

Cited by 12 publications

References 9 publications

Evolution of molecular composition of polycarbosilane and its effect on spinnability

Evolution of molecular composition of polycarbosilane and its effect on spinnability

High-Temperature-Sensing Smart Bolt Based on Indium Tin Oxide/In2O3 Thin-Film Thermocouples with Nickel-Based Single-Crystal Superalloy via Screen Printing

Toughening mechanisms of Ti3SiC2- and TiB2- toughened SiC matrix prepared via reactive melt infiltration

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