Oxide-scale evolution and dynamic oxidation mechanism of ZrB2-SiC in high-enthalpy plasma wind tunnel

Liu, Liping; Yang, Lingwei; Zhao, Changhao; Xiao, Xueren; Ye, Zhiyong; Zhang, Jun; Wang, Guolin; Wang, Yiguang

doi:10.1016/j.jeurceramsoc.2021.02.006

Cited by 19 publications

(3 citation statements)

References 30 publications

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“…The main plasma parameters involved enthalpy (H 0 ), heat flux ( cw q ), flow pressure (P), flow density (), velocity (U), and percentages of atomic O and N (C O and C N ). They were determined by a standard flow reconstruction protocol developed for the 1 MW plasma wind tunnel [25]. cw q and P were firstly measured by a copper slug (TU1 type, purity ≥ 99.97%, O content ≤ 0.003%) and a pitot pressure probe (DMP331, 0-60 kPa, 0.01% full scale, Germany), respectively.…”

Section: Dynamic Oxidation Experiments In Plasma Wind Tunnelmentioning

confidence: 99%

Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas

et al. 2022

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This work employed an inductively coupled plasma wind tunnel to study the dynamic oxidation mechanisms of carbon fiber reinforced SiC matrix composite (Cf/SiC) in high-enthalpy and high-speed plasmas. The results highlighted a transition of passive/active oxidations of SiC at 800–1600 °C and 1–5 kPa. Specially, the active oxidation led to the corrosion of the SiC coating and interruption of the SiO2 growth. The transition borders of active/passive oxidations were thus defined with respect to oxidation temperature and partial pressure of atomic O in the high-enthalpy and high-speed plasmas. In the transition and passive domains, the SiC dissipation was negligible. By multiple dynamic oxidations of Cf/SiC in the domains, the SiO2 thickness was not monotonously increased due to the competing mechanisms of passive oxidation of SiC and dissipation of SiO2. In addition, the mechanical properties of the SiC coating/matrix and the Cf/SiC were maintained after long-term dynamic oxidations, which suggested an excellent thermal stability of Cf/SiC serving in thermal protection systems (TPSs) of reusable hypersonic vehicles.

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Section: Dynamic Oxidation Experiments In Plasma Wind Tunnelmentioning

confidence: 99%

Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas

et al. 2022

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“…critical to the optimal structure design of a spacecraft thermal protection system. Usually, the high-temperature ablation test is a kind of 'pass or fail' test and the ablation changes are studied only at a single location, such as the stagnation point [1][2][3][4], by comparing the test object shapes of the beginning and ending conditions [5,6]. The contact method using an implanted optical fiber sensor to achieve the online measurement of the ablation rate for an ablative heat shield [7], proposed by Sakai et al in [7], can only give the shape change along one direction.…”

Section: Introductionmentioning

confidence: 99%

“…Wen et al [12] in 2017 introduced a physical filter to a blue LED light projector system for thermal radiation suppression to measure the test object at 1200 • C. Also, the single-camera-projector structured light method, replacing one camera in the binocular vision system with a projector, has the advantages of not requiring recognizable surface features of the object and full-field measurement capacity in 3D full-field measurement applications [13]. For a wind tunnel test, the measured stagnation point temperature of the object can reach over 1600 • C [6]. It is well known that the background radiation increases as the object temperature rises.…”

Section: Introductionmentioning

confidence: 99%

In-situ 3D shape measurement system for a high-temperature object in a plasma wind tunnel via DMD-projection laser structured light and adaptive speckle filtering

Liu¹,

Yang²,

Xiao³

et al. 2022

Meas. Sci. Technol.

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Evaluation of object 3D shape change during ablation in wind tunnel test is critical for optimization of thermal protection system. However, strong thermal radiation and harsh environment bring challenges to the traditional measurement methods. A single camera DMD-projector structured laser light system is proposed for in-situ 3D shape measurement in wind tunnel test. A customized Digital Micro-Mirror Device (DMD) combined with laser source is devised for projecting concentrated full-field high-power structured light stripes. To filter laser speckle noise in projected chessboard images for model calibration, an auto-window Kuwahara adaptive filter is put forward. 3D shape of a blunt-head cylinder was in-situ measured in a plasma wind tunnel which maximum temperature reached 1950℃. Diameter reconstruction error was within 0.85% (0.17/20.03mm). With projected laser light and multi-step filters, ablation process of front face of a dome-top cylinder at 1950℃ was clearly observed at a long working distance over 1.5m.

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New insights on the ablation mechanism of silicon carbide in dissociated air plasmas

Yang

Li²,

Zhang

et al. 2022

Aerospace Science and Technology

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Oxide-scale evolution and dynamic oxidation mechanism of ZrB2-SiC in high-enthalpy plasma wind tunnel

Cited by 19 publications

References 30 publications

Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas

Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas

In-situ 3D shape measurement system for a high-temperature object in a plasma wind tunnel via DMD-projection laser structured light and adaptive speckle filtering

New insights on the ablation mechanism of silicon carbide in dissociated air plasmas

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