Spectral Emissivity of UHTC Coatings for Super Light-weight Thermal Protection Systems of Space Re-entry Vehicles

Carlo Purpura; Eduardo Trifoni; Marius Kütemeyer; Gennadiy Frolov; Irina Neshpor; Laura Silvestroni; Maria Parco

Spectral Emissivity of UHTC Coatings for Super Light-weight Thermal Protection Systems of Space Re-entry Vehicles

Carlo Purpura, Eduardo Trifoni, Marius Kütemeyer, Gennadiy Frolov, Irina Neshpor, Laura Silvestroni, Maria Parco

Research output: Contribution to conference › Paper › peer-review

Abstract

A test campaign was performed in the GHIBLI arc jet facility in the framework of the European funded LIGHT-TPS project, devoted to research and development of Ultra-High Temperature Ceramic (UHTC) coatings on Ceramic Matrix Composites (CMC) for super lightweight Thermal Protection Systems (TPS) of space re-entry vehicles. Two UHTC coatings made of different zirconium diboride (ZrB2) compositions, ZrB2-3SiC-5WC and ZrB2-20SiC-10AlN, were tested with the aim of increasing the oxidation resistance of the Carbon/Carbon (C/C) CMC substrates. In particular, four UHTC coated flat disks of 20 mm of diameter were exposed to an hypersonic jet of plasma composed of air and argon for a total duration of 5ï¿½6 minutes, achieving a maximum surface temperature of 1800ï¿½2000ï¿½C at stagnation pressures of 23ï¿½25 mbar. The UHTC coating made by ZrB2-20SiC-10AlN survived the tests forming an oxidized surface layer. Three different pyrometers have been used to measure the surface temperature in the disk stagnation area. During the tests, one pyrometer was repeatedly switched from dual-color to single-color mode in order to evaluate the experimental emissivity of the surface at different temperatures. At the end, the measured spectral emissivity values at the wavelength Î»e= 1 Î¼m varied between 0.6 and 0.5 for ZrB2-3SiC-5WC coating in the range 1750ï¿½1800ï¿½C and between 0.6 and 0.4 for ZrB2-20SiC-10AlN one in the range 1700ï¿½2000ï¿½C.

Original language	English
Pages	18-26
Publication status	Published - 2019
Event	8th International Workshop on Radiation of High Temperature Gases for Space Missions - Madrid, Spain Duration: 1 Jan 2019 → … https://indico.esa.int/event/272/

Conference

Conference	8th International Workshop on Radiation of High Temperature Gases for Space Missions
Country/Territory	Spain
Period	1/01/19 → …
Other	March 25-29
Internet address	https://indico.esa.int/event/272/

Cite this

@conference{8d74d489e1a74a6eb04dd237f6a93b80,

title = "Spectral Emissivity of UHTC Coatings for Super Light-weight Thermal Protection Systems of Space Re-entry Vehicles",

abstract = "A test campaign was performed in the GHIBLI arc jet facility in the framework of the European funded LIGHT-TPS project, devoted to research and development of Ultra-High Temperature Ceramic (UHTC) coatings on Ceramic Matrix Composites (CMC) for super lightweight Thermal Protection Systems (TPS) of space re-entry vehicles. Two UHTC coatings made of different zirconium diboride (ZrB2) compositions, ZrB2-3SiC-5WC and ZrB2-20SiC-10AlN, were tested with the aim of increasing the oxidation resistance of the Carbon/Carbon (C/C) CMC substrates. In particular, four UHTC coated flat disks of 20 mm of diameter were exposed to an hypersonic jet of plasma composed of air and argon for a total duration of 5{\"i}¿½6 minutes, achieving a maximum surface temperature of 1800{\"i}¿½2000{\"i}¿½C at stagnation pressures of 23{\"i}¿½25 mbar. The UHTC coating made by ZrB2-20SiC-10AlN survived the tests forming an oxidized surface layer. Three different pyrometers have been used to measure the surface temperature in the disk stagnation area. During the tests, one pyrometer was repeatedly switched from dual-color to single-color mode in order to evaluate the experimental emissivity of the surface at different temperatures. At the end, the measured spectral emissivity values at the wavelength {\^I}»e= 1 {\^I}¼m varied between 0.6 and 0.5 for ZrB2-3SiC-5WC coating in the range 1750{\"i}¿½1800{\"i}¿½C and between 0.6 and 0.4 for ZrB2-20SiC-10AlN one in the range 1700{\"i}¿½2000{\"i}¿½C.",

author = "Carlo Purpura and Eduardo Trifoni and Marius K{\"u}temeyer and Gennadiy Frolov and Irina Neshpor and Laura Silvestroni and Maria Parco",

year = "2019",

language = "English",

pages = "18--26",

note = "8th International Workshop on Radiation of High Temperature Gases for Space Missions ; Conference date: 01-01-2019",

url = "https://indico.esa.int/event/272/",

}

TY - CONF

T1 - Spectral Emissivity of UHTC Coatings for Super Light-weight Thermal Protection Systems of Space Re-entry Vehicles

AU - Purpura, Carlo

AU - Trifoni, Eduardo

AU - Kütemeyer, Marius

AU - Frolov, Gennadiy

AU - Neshpor, Irina

AU - Silvestroni, Laura

AU - Parco, Maria

PY - 2019

Y1 - 2019

N2 - A test campaign was performed in the GHIBLI arc jet facility in the framework of the European funded LIGHT-TPS project, devoted to research and development of Ultra-High Temperature Ceramic (UHTC) coatings on Ceramic Matrix Composites (CMC) for super lightweight Thermal Protection Systems (TPS) of space re-entry vehicles. Two UHTC coatings made of different zirconium diboride (ZrB2) compositions, ZrB2-3SiC-5WC and ZrB2-20SiC-10AlN, were tested with the aim of increasing the oxidation resistance of the Carbon/Carbon (C/C) CMC substrates. In particular, four UHTC coated flat disks of 20 mm of diameter were exposed to an hypersonic jet of plasma composed of air and argon for a total duration of 5ï¿½6 minutes, achieving a maximum surface temperature of 1800ï¿½2000ï¿½C at stagnation pressures of 23ï¿½25 mbar. The UHTC coating made by ZrB2-20SiC-10AlN survived the tests forming an oxidized surface layer. Three different pyrometers have been used to measure the surface temperature in the disk stagnation area. During the tests, one pyrometer was repeatedly switched from dual-color to single-color mode in order to evaluate the experimental emissivity of the surface at different temperatures. At the end, the measured spectral emissivity values at the wavelength Î»e= 1 Î¼m varied between 0.6 and 0.5 for ZrB2-3SiC-5WC coating in the range 1750ï¿½1800ï¿½C and between 0.6 and 0.4 for ZrB2-20SiC-10AlN one in the range 1700ï¿½2000ï¿½C.

AB - A test campaign was performed in the GHIBLI arc jet facility in the framework of the European funded LIGHT-TPS project, devoted to research and development of Ultra-High Temperature Ceramic (UHTC) coatings on Ceramic Matrix Composites (CMC) for super lightweight Thermal Protection Systems (TPS) of space re-entry vehicles. Two UHTC coatings made of different zirconium diboride (ZrB2) compositions, ZrB2-3SiC-5WC and ZrB2-20SiC-10AlN, were tested with the aim of increasing the oxidation resistance of the Carbon/Carbon (C/C) CMC substrates. In particular, four UHTC coated flat disks of 20 mm of diameter were exposed to an hypersonic jet of plasma composed of air and argon for a total duration of 5ï¿½6 minutes, achieving a maximum surface temperature of 1800ï¿½2000ï¿½C at stagnation pressures of 23ï¿½25 mbar. The UHTC coating made by ZrB2-20SiC-10AlN survived the tests forming an oxidized surface layer. Three different pyrometers have been used to measure the surface temperature in the disk stagnation area. During the tests, one pyrometer was repeatedly switched from dual-color to single-color mode in order to evaluate the experimental emissivity of the surface at different temperatures. At the end, the measured spectral emissivity values at the wavelength Î»e= 1 Î¼m varied between 0.6 and 0.5 for ZrB2-3SiC-5WC coating in the range 1750ï¿½1800ï¿½C and between 0.6 and 0.4 for ZrB2-20SiC-10AlN one in the range 1700ï¿½2000ï¿½C.

M3 - Paper

SP - 18

EP - 26

T2 - 8th International Workshop on Radiation of High Temperature Gases for Space Missions

Y2 - 1 January 2019

ER -

Spectral Emissivity of UHTC Coatings for Super Light-weight Thermal Protection Systems of Space Re-entry Vehicles

Abstract

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