On the Influence of the Sample Absorptivity when Studying the Thermal Degradation of Materials

The change in absorptivity during the degradation process of materials is discussed, and its influence as one of the involved parameters in the degradation models is studied. Three materials with very different behaviors are used for the demonstration of its role: a carbon composite material, which...
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Gespeichert in:

Autor*in:	Pascal Boulet [verfasserIn] Damien Brissinger [verfasserIn] Anthony Collin [verfasserIn] Zoubir Acem [verfasserIn] Gilles Parent [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2015

Schlagwörter:	emissivity absorptivity pyrolysis degradation radiative transfer

Übergeordnetes Werk:	In: Materials - MDPI AG, 2009, 8(2015), 8, Seite 5398-5413
Übergeordnetes Werk:	volume:8 ; year:2015 ; number:8 ; pages:5398-5413

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/ma8085251

Katalog-ID:	DOAJ052518892

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spelling	10.3390/ma8085251 doi (DE-627)DOAJ052518892 (DE-599)DOAJ7397f71414e046f9b6d72408a4fe84e5 DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Pascal Boulet verfasserin aut On the Influence of the Sample Absorptivity when Studying the Thermal Degradation of Materials 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The change in absorptivity during the degradation process of materials is discussed, and its influence as one of the involved parameters in the degradation models is studied. Three materials with very different behaviors are used for the demonstration of its role: a carbon composite material, which is opaque, almost grey, a plywood slab, which is opaque and spectral-dependent and a clear PMMA slab, which is semitransparent. Data are analyzed for virgin and degraded materials at different steps of thermal degradation. It is seen that absorptivity and emissivity often reach high values in the range of 0.90–0.95 with a near-grey behavior after significant thermal aggression, but depending on the materials of interest, some significant evolution may be first observed, especially during the early stages of the degradation. Supplementary inaccuracy can come from the heterogeneity of the incident flux on the slab. As a whole, discrepancies up to 20% can be observed on the absorbed flux depending on the degradation time, mainly because of the spectral variations of the absorption and up to 10% more, depending on the position on the slab. Simple models with a constant and unique value of absorptivity may then lead to inaccuracies in the evaluation of the radiative flux absorption, with possible consequences on the pyrolysis analysis, especially for properties related to the early step of the degradation process, like the time to ignition, for example. emissivity absorptivity pyrolysis degradation radiative transfer Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Damien Brissinger verfasserin aut Anthony Collin verfasserin aut Zoubir Acem verfasserin aut Gilles Parent verfasserin aut In Materials MDPI AG, 2009 8(2015), 8, Seite 5398-5413 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:8 year:2015 number:8 pages:5398-5413 https://doi.org/10.3390/ma8085251 kostenfrei https://doaj.org/article/7397f71414e046f9b6d72408a4fe84e5 kostenfrei http://www.mdpi.com/1996-1944/8/8/5251 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 8 2015 8 5398-5413
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callnumber-first	T - Technology
author	Pascal Boulet
spellingShingle	Pascal Boulet misc TK1-9971 misc TA1-2040 misc QH201-278.5 misc QC120-168.85 misc emissivity misc absorptivity misc pyrolysis misc degradation misc radiative transfer misc Technology misc T misc Electrical engineering. Electronics. Nuclear engineering misc Engineering (General). Civil engineering (General) misc Microscopy misc Descriptive and experimental mechanics On the Influence of the Sample Absorptivity when Studying the Thermal Degradation of Materials
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topic_title	TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 On the Influence of the Sample Absorptivity when Studying the Thermal Degradation of Materials emissivity absorptivity pyrolysis degradation radiative transfer
topic	misc TK1-9971 misc TA1-2040 misc QH201-278.5 misc QC120-168.85 misc emissivity misc absorptivity misc pyrolysis misc degradation misc radiative transfer misc Technology misc T misc Electrical engineering. Electronics. Nuclear engineering misc Engineering (General). Civil engineering (General) misc Microscopy misc Descriptive and experimental mechanics
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title_sort	on the influence of the sample absorptivity when studying the thermal degradation of materials
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title_auth	On the Influence of the Sample Absorptivity when Studying the Thermal Degradation of Materials
abstract	The change in absorptivity during the degradation process of materials is discussed, and its influence as one of the involved parameters in the degradation models is studied. Three materials with very different behaviors are used for the demonstration of its role: a carbon composite material, which is opaque, almost grey, a plywood slab, which is opaque and spectral-dependent and a clear PMMA slab, which is semitransparent. Data are analyzed for virgin and degraded materials at different steps of thermal degradation. It is seen that absorptivity and emissivity often reach high values in the range of 0.90–0.95 with a near-grey behavior after significant thermal aggression, but depending on the materials of interest, some significant evolution may be first observed, especially during the early stages of the degradation. Supplementary inaccuracy can come from the heterogeneity of the incident flux on the slab. As a whole, discrepancies up to 20% can be observed on the absorbed flux depending on the degradation time, mainly because of the spectral variations of the absorption and up to 10% more, depending on the position on the slab. Simple models with a constant and unique value of absorptivity may then lead to inaccuracies in the evaluation of the radiative flux absorption, with possible consequences on the pyrolysis analysis, especially for properties related to the early step of the degradation process, like the time to ignition, for example.
abstractGer	The change in absorptivity during the degradation process of materials is discussed, and its influence as one of the involved parameters in the degradation models is studied. Three materials with very different behaviors are used for the demonstration of its role: a carbon composite material, which is opaque, almost grey, a plywood slab, which is opaque and spectral-dependent and a clear PMMA slab, which is semitransparent. Data are analyzed for virgin and degraded materials at different steps of thermal degradation. It is seen that absorptivity and emissivity often reach high values in the range of 0.90–0.95 with a near-grey behavior after significant thermal aggression, but depending on the materials of interest, some significant evolution may be first observed, especially during the early stages of the degradation. Supplementary inaccuracy can come from the heterogeneity of the incident flux on the slab. As a whole, discrepancies up to 20% can be observed on the absorbed flux depending on the degradation time, mainly because of the spectral variations of the absorption and up to 10% more, depending on the position on the slab. Simple models with a constant and unique value of absorptivity may then lead to inaccuracies in the evaluation of the radiative flux absorption, with possible consequences on the pyrolysis analysis, especially for properties related to the early step of the degradation process, like the time to ignition, for example.
abstract_unstemmed	The change in absorptivity during the degradation process of materials is discussed, and its influence as one of the involved parameters in the degradation models is studied. Three materials with very different behaviors are used for the demonstration of its role: a carbon composite material, which is opaque, almost grey, a plywood slab, which is opaque and spectral-dependent and a clear PMMA slab, which is semitransparent. Data are analyzed for virgin and degraded materials at different steps of thermal degradation. It is seen that absorptivity and emissivity often reach high values in the range of 0.90–0.95 with a near-grey behavior after significant thermal aggression, but depending on the materials of interest, some significant evolution may be first observed, especially during the early stages of the degradation. Supplementary inaccuracy can come from the heterogeneity of the incident flux on the slab. As a whole, discrepancies up to 20% can be observed on the absorbed flux depending on the degradation time, mainly because of the spectral variations of the absorption and up to 10% more, depending on the position on the slab. Simple models with a constant and unique value of absorptivity may then lead to inaccuracies in the evaluation of the radiative flux absorption, with possible consequences on the pyrolysis analysis, especially for properties related to the early step of the degradation process, like the time to ignition, for example.
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title_short	On the Influence of the Sample Absorptivity when Studying the Thermal Degradation of Materials
url	https://doi.org/10.3390/ma8085251 https://doaj.org/article/7397f71414e046f9b6d72408a4fe84e5 http://www.mdpi.com/1996-1944/8/8/5251 https://doaj.org/toc/1996-1944
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On the Influence of the Sample Absorptivity when Studying the Thermal Degradation of Materials

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