<p>The intensification of space activities has led to an increase in orbital debris, making it crucial to study its behavior during atmospheric re-entry. This study focuses on the oxidation of Ti–6Al–4V alloy, a material used in the manufacture of pressurized fuel tanks for the aerospace industry. This alloy was exposed to an inductively coupled air plasma in the SOUPLIN set-up at the CORIA laboratory. Two operating points were studied: (1400 Pa, 4.6 MJ <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$\hbox {kg}^{-1}$</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mtext>kg</mtext> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> </InlineEquation>) and (4500 Pa, 7.3 MJ <InlineEquation ID="IEq2"> <EquationSource Format="TEX">$\hbox {kg}^{-1}$</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mtext>kg</mtext> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> </InlineEquation>), for oxidation times of up to 120 s. Surface analyses (XRD, Raman spectroscopy, and SEM-EDS) reveal a predominance of <InlineEquation ID="IEq3"> <EquationSource Format="TEX">$\hbox {TiO}_{2}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>TiO</mtext> <mn>2</mn> </msub> </math></EquationSource> </InlineEquation> rutile throughout the oxide layer, as well as the localized presence of <InlineEquation ID="IEq4"> <EquationSource Format="TEX">$\hbox {Al}_{2}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>Al</mtext> <mn>2</mn> </msub> </math></EquationSource> </InlineEquation> <InlineEquation ID="IEq5"> <EquationSource Format="TEX">$\hbox {O}_{3}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>O</mtext> <mn>3</mn> </msub> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq6"> <EquationSource Format="TEX">$\hbox {Al}_{2}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>Al</mtext> <mn>2</mn> </msub> </math></EquationSource> </InlineEquation> <InlineEquation ID="IEq7"> <EquationSource Format="TEX">$\hbox {TiO}_{5}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>TiO</mtext> <mn>5</mn> </msub> </math></EquationSource> </InlineEquation> at temperatures above <InlineEquation ID="IEq8"> <EquationSource Format="TEX">$1150\,^\circ $</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>1150</mn> <mmultiscripts> <mspace width="0.166667em" /> <mrow /> <mo>∘</mo> </mmultiscripts> </mrow> </math></EquationSource> </InlineEquation>C.</p>

Oxidation of Ti–6Al–4V titanium alloy in air plasma

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2025年4月21日

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Adrien Brault,
Samuel Jouen,
David Gibouin,
Pascal Boubert

摘要

The intensification of space activities has led to an increase in orbital debris, making it crucial to study its behavior during atmospheric re-entry. This study focuses on the oxidation of Ti–6Al–4V alloy, a material used in the manufacture of pressurized fuel tanks for the aerospace industry. This alloy was exposed to an inductively coupled air plasma in the SOUPLIN set-up at the CORIA laboratory. Two operating points were studied: (1400 Pa, 4.6 MJ $\hbox {kg}^{-1}$ ${kg}^{- 1}$ ) and (4500 Pa, 7.3 MJ $\hbox {kg}^{-1}$ ${kg}^{- 1}$ ), for oxidation times of up to 120 s. Surface analyses (XRD, Raman spectroscopy, and SEM-EDS) reveal a predominance of $\hbox {TiO}_{2}$ ${TiO}_{2}$ rutile throughout the oxide layer, as well as the localized presence of $\hbox {Al}_{2}$ ${Al}_{2}$ $\hbox {O}_{3}$ $O_{3}$ and $\hbox {Al}_{2}$ ${Al}_{2}$ $\hbox {TiO}_{5}$ ${TiO}_{5}$ at temperatures above $1150\,^\circ $ $1150^{\circ}$ C.