CobaltMaghrebV1, PascalFrancis, Curation, bibRecord, 000102

Effect of tungsten 0-8 wt.% on the oxidation of Co-Cr alloys

Identifieur interne : 000102 ( PascalFrancis/Curation ); précédent : 000101; suivant : 000103

Effect of tungsten 0-8 wt.% on the oxidation of Co-Cr alloys

Auteurs : A. Karaali [Algérie] ; K. Mirouh [Algérie] ; S. Hamamda [Algérie] ; P. Guiraldenq [France]

Source :

Computational materials science [ 0927-0256 ] ; 2005.

RBID : Pascal:05-0183910

Descripteurs français

Pascal (Inist)
- Oxydation, Microstructure, Addition tungstène, Préoxydation, Analyse microsonde électronique, Microscopie électronique balayage, Diffraction RX, Epaisseur, Diffusion(transport), Energie activation, Tungstène oxyde, Cobalt alliage, Chrome alliage, Couche oxyde, Chrome oxyde, Cobalt oxyde, Spinelles, Composé minéral, Métal transition composé, W, Cr O, Cr2O3, 66.
Wicri :
- topic : Composé minéral.

English descriptors

KwdEn :
- Activation energy, Chromium alloys, Chromium oxides, Cobalt alloys, Cobalt oxides, Diffusion, Electron microprobe analysis, Inorganic compounds, Microstructure, Oxidation, Oxide layer, Preoxidation, Scanning electron microscopy, Spinels, Thickness, Transition element compounds, Tungsten additions, Tungsten oxides, XRD.

Abstract

The nature and the morphology of the formed oxide layers at the alloys' surface have great importance on the quality of the ceramic/metal bond. This study shows the effect of the tungsten addition on the formation and the growth of the oxide layers on the Co-Cr alloys in preoxidation temperature range 950-1050 °C, thus including the temperature range of the ceramisation process that these alloys will undergo later. Their characterization, by microprobe analysis, scanning electron microscopy (SEM), spectrography with luminescent discharge (SLD) and low angle X-ray diffraction. reveals the formation of two distinct layers: the first one, from the external surface, is formed only of pure CoO, while the second one is a mixture of Cr₂O₃ particles and cobalt-tungsten oxide dispersed in a CoCr₂O₄ matrix. The tungsten addition up to 8 wt.% modifies considerably the thickness of the formed layers as a consequence of its accumulating in the second layer, thus blocking the cobalt diffusion towards the alloy surface.

A01	`01`	`1`		`@0 0927-0256`
A03		`1`		`@0 Comput. mater. sci.`
A05				`@2 33`
A06				`@2 1-3`
A08	`01`	`1`	`ENG`	`@1 Effect of tungsten 0-8 wt.% on the oxidation of Co-Cr alloys`
A09	`01`	`1`	`ENG`	`@1 Proceedings of the E-MRS 2004, Spring Meeting - Symposium H: Atomic materials design: modelling and characterization, Strasbourg, France, 24-28 May, 2004`
A11	`01`	`1`		`@1 KARAALI (A.)`
A11	`02`	`1`		`@1 MIROUH (K.)`
A11	`03`	`1`		`@1 HAMAMDA (S.)`
A11	`04`	`1`		`@1 GUIRALDENQ (P.)`
A12	`01`	`1`		`@1 ESTEVE (Alain) @9 ed.`
A12	`02`	`1`		`@1 DJAFARI-ROUHANI (Mehdi) @9 ed.`
A12	`03`	`1`		`@1 GREER (Jim) @9 ed.`
A12	`04`	`1`		`@1 KORKIN (Anatoli) @9 ed.`
A14	`01`			`@1 Laboratoire des Propriétés Thermodynamiques et Traitement de Surfaces des Matériaux, Département de Physique Faculté des Sciences, Université Mentouri Constantine, Route de Ain El-bey 25000 @2 Constantine @3 DZA @Z 1 aut. @Z 2 aut. @Z 3 aut.`
A14	`02`			`@1 Département STMS, Ecole Centrale de Lyon 69131 @2 Ecully @3 FRA @Z 4 aut.`
A15	`01`			`@1 Laboratoire d'analyse et d'architecture des systèmes (LAAS-CNRS), 7, Ave du Colonel Roche @2 Toulouse 31077 @3 FRA @Z 1 aut.`
A15	`02`			`@1 Toulouse University @2 Toulouse @3 FRA @Z 2 aut.`
A15	`03`			`@1 NMRC, University College @2 Cork @3 IRL @Z 3 aut.`
A15	`04`			`@1 Nano and Giga Solutions, Inc. @2 Gilbert, AZ @3 USA @Z 4 aut.`
A18	`01`	`1`		`@1 European Network ATOMCAD @3 EUR @9 patr.`
A18	`02`	`1`		`@1 European Materials Research Society @3 EUR @9 patr.`
A20				`@1 37-43`
A21				`@1 2005`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 26032 @5 354000125038020060`
A44				`@0 0000 @1 © 2005 INIST-CNRS. All rights reserved.`
A45				`@0 25 ref.`
A47	`01`	`1`		`@0 05-0183910`
A60				`@1 P @2 C`
A61				`@0 A`
A64	`01`	`1`		`@0 Computational materials science`
A66	`01`			`@0 NLD`
C01	`01`		`ENG`	@0 The nature and the morphology of the formed oxide layers at the alloys' surface have great importance on the quality of the ceramic/metal bond. This study shows the effect of the tungsten addition on the formation and the growth of the oxide layers on the Co-Cr alloys in preoxidation temperature range 950-1050 °C, thus including the temperature range of the ceramisation process that these alloys will undergo later. Their characterization, by microprobe analysis, scanning electron microscopy (SEM), spectrography with luminescent discharge (SLD) and low angle X-ray diffraction. reveals the formation of two distinct layers: the first one, from the external surface, is formed only of pure CoO, while the second one is a mixture of Cr₂O₃ particles and cobalt-tungsten oxide dispersed in a CoCr₂O₄ matrix. The tungsten addition up to 8 wt.% modifies considerably the thickness of the formed layers as a consequence of its accumulating in the second layer, thus blocking the cobalt diffusion towards the alloy surface.
C02	`01`	`3`		`@0 001B60F`
C03	`01`	`3`	`FRE`	`@0 Oxydation @5 02`
C03	`01`	`3`	`ENG`	`@0 Oxidation @5 02`
C03	`02`	`3`	`FRE`	`@0 Microstructure @5 03`
C03	`02`	`3`	`ENG`	`@0 Microstructure @5 03`
C03	`03`	`3`	`FRE`	`@0 Addition tungstène @5 04`
C03	`03`	`3`	`ENG`	`@0 Tungsten additions @5 04`
C03	`04`	`X`	`FRE`	`@0 Préoxydation @5 05`
C03	`04`	`X`	`ENG`	`@0 Preoxidation @5 05`
C03	`04`	`X`	`SPA`	`@0 Preoxidación @5 05`
C03	`05`	`3`	`FRE`	`@0 Analyse microsonde électronique @5 06`
C03	`05`	`3`	`ENG`	`@0 Electron microprobe analysis @5 06`
C03	`06`	`3`	`FRE`	`@0 Microscopie électronique balayage @5 07`
C03	`06`	`3`	`ENG`	`@0 Scanning electron microscopy @5 07`
C03	`07`	`3`	`FRE`	`@0 Diffraction RX @5 08`
C03	`07`	`3`	`ENG`	`@0 XRD @5 08`
C03	`08`	`3`	`FRE`	`@0 Epaisseur @5 09`
C03	`08`	`3`	`ENG`	`@0 Thickness @5 09`
C03	`09`	`3`	`FRE`	`@0 Diffusion(transport) @5 10`
C03	`09`	`3`	`ENG`	`@0 Diffusion @5 10`
C03	`10`	`3`	`FRE`	`@0 Energie activation @5 11`
C03	`10`	`3`	`ENG`	`@0 Activation energy @5 11`
C03	`11`	`3`	`FRE`	`@0 Tungstène oxyde @2 NK @5 15`
C03	`11`	`3`	`ENG`	`@0 Tungsten oxides @2 NK @5 15`
C03	`12`	`3`	`FRE`	`@0 Cobalt alliage @5 16`
C03	`12`	`3`	`ENG`	`@0 Cobalt alloys @5 16`
C03	`13`	`3`	`FRE`	`@0 Chrome alliage @5 17`
C03	`13`	`3`	`ENG`	`@0 Chromium alloys @5 17`
C03	`14`	`X`	`FRE`	`@0 Couche oxyde @5 18`
C03	`14`	`X`	`ENG`	`@0 Oxide layer @5 18`
C03	`14`	`X`	`SPA`	`@0 Capa óxido @5 18`
C03	`15`	`3`	`FRE`	`@0 Chrome oxyde @2 NK @5 19`
C03	`15`	`3`	`ENG`	`@0 Chromium oxides @2 NK @5 19`
C03	`16`	`3`	`FRE`	`@0 Cobalt oxyde @2 NK @5 20`
C03	`16`	`3`	`ENG`	`@0 Cobalt oxides @2 NK @5 20`
C03	`17`	`3`	`FRE`	`@0 Spinelles @5 21`
C03	`17`	`3`	`ENG`	`@0 Spinels @5 21`
C03	`18`	`3`	`FRE`	`@0 Composé minéral @5 48`
C03	`18`	`3`	`ENG`	`@0 Inorganic compounds @5 48`
C03	`19`	`3`	`FRE`	`@0 Métal transition composé @5 49`
C03	`19`	`3`	`ENG`	`@0 Transition element compounds @5 49`
C03	`20`	`3`	`FRE`	`@0 W @4 INC @5 52`
C03	`21`	`3`	`FRE`	`@0 Cr O @4 INC @5 53`
C03	`22`	`3`	`FRE`	`@0 Cr2O3 @4 INC @5 54`
C03	`23`	`3`	`FRE`	`@0 66 @4 INC @5 56`
N21				`@1 122`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

A30	`01`	`1`	`ENG`	`@1 E-MRS 2004 Spring Meeting - Symposium H @3 Strasbourg FRA @4 2004-05-24`

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Le document en format XML

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<term>Cobalt oxides</term>
<term>Diffusion</term>
<term>Electron microprobe analysis</term>
<term>Inorganic compounds</term>
<term>Microstructure</term>
<term>Oxidation</term>
<term>Oxide layer</term>
<term>Preoxidation</term>
<term>Scanning electron microscopy</term>
<term>Spinels</term>
<term>Thickness</term>
<term>Transition element compounds</term>
<term>Tungsten additions</term>
<term>Tungsten oxides</term>
<term>XRD</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Oxydation</term>
<term>Microstructure</term>
<term>Addition tungstène</term>
<term>Préoxydation</term>
<term>Analyse microsonde électronique</term>
<term>Microscopie électronique balayage</term>
<term>Diffraction RX</term>
<term>Epaisseur</term>
<term>Diffusion(transport)</term>
<term>Energie activation</term>
<term>Tungstène oxyde</term>
<term>Cobalt alliage</term>
<term>Chrome alliage</term>
<term>Couche oxyde</term>
<term>Chrome oxyde</term>
<term>Cobalt oxyde</term>
<term>Spinelles</term>
<term>Composé minéral</term>
<term>Métal transition composé</term>
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<term>Cr O</term>
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<front><div type="abstract" xml:lang="en">The nature and the morphology of the formed oxide layers at the alloys' surface have great importance on the quality of the ceramic/metal bond. This study shows the effect of the tungsten addition on the formation and the growth of the oxide layers on the Co-Cr alloys in preoxidation temperature range 950-1050 °C, thus including the temperature range of the ceramisation process that these alloys will undergo later. Their characterization, by microprobe analysis, scanning electron microscopy (SEM), spectrography with luminescent discharge (SLD) and low angle X-ray diffraction. reveals the formation of two distinct layers: the first one, from the external surface, is formed only of pure CoO, while the second one is a mixture of Cr<sub>2</sub>
O<sub>3</sub>
 particles and cobalt-tungsten oxide dispersed in a CoCr<sub>2</sub>
O<sub>4</sub>
 matrix. The tungsten addition up to 8 wt.% modifies considerably the thickness of the formed layers as a consequence of its accumulating in the second layer, thus blocking the cobalt diffusion towards the alloy surface.</div>
</front>
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<fA14 i1="01"><s1>Laboratoire des Propriétés Thermodynamiques et Traitement de Surfaces des Matériaux, Département de Physique Faculté des Sciences, Université Mentouri Constantine, Route de Ain El-bey 25000</s1>
<s2>Constantine</s2>
<s3>DZA</s3>
<sZ>1 aut.</sZ>
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<sZ>4 aut.</sZ>
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<fA15 i1="01"><s1>Laboratoire d'analyse et d'architecture des systèmes (LAAS-CNRS), 7, Ave du Colonel Roche</s1>
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<s3>FRA</s3>
<sZ>1 aut.</sZ>
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<sZ>3 aut.</sZ>
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<s2>Gilbert, AZ</s2>
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<sZ>4 aut.</sZ>
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<fA18 i1="01" i2="1"><s1>European Network ATOMCAD</s1>
<s3>EUR</s3>
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<fC01 i1="01" l="ENG"><s0>The nature and the morphology of the formed oxide layers at the alloys' surface have great importance on the quality of the ceramic/metal bond. This study shows the effect of the tungsten addition on the formation and the growth of the oxide layers on the Co-Cr alloys in preoxidation temperature range 950-1050 °C, thus including the temperature range of the ceramisation process that these alloys will undergo later. Their characterization, by microprobe analysis, scanning electron microscopy (SEM), spectrography with luminescent discharge (SLD) and low angle X-ray diffraction. reveals the formation of two distinct layers: the first one, from the external surface, is formed only of pure CoO, while the second one is a mixture of Cr<sub>2</sub>
O<sub>3</sub>
 particles and cobalt-tungsten oxide dispersed in a CoCr<sub>2</sub>
O<sub>4</sub>
 matrix. The tungsten addition up to 8 wt.% modifies considerably the thickness of the formed layers as a consequence of its accumulating in the second layer, thus blocking the cobalt diffusion towards the alloy surface.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B60F</s0>
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<fC03 i1="01" i2="3" l="FRE"><s0>Oxydation</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG"><s0>Oxidation</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE"><s0>Microstructure</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG"><s0>Microstructure</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Addition tungstène</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Tungsten additions</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Préoxydation</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Preoxidation</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Preoxidación</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Analyse microsonde électronique</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Electron microprobe analysis</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Microscopie électronique balayage</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Scanning electron microscopy</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Diffraction RX</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>XRD</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Epaisseur</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Thickness</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Diffusion(transport)</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Diffusion</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Energie activation</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Activation energy</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Tungstène oxyde</s0>
<s2>NK</s2>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Tungsten oxides</s0>
<s2>NK</s2>
<s5>15</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Cobalt alliage</s0>
<s5>16</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Cobalt alloys</s0>
<s5>16</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Chrome alliage</s0>
<s5>17</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Chromium alloys</s0>
<s5>17</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Couche oxyde</s0>
<s5>18</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Oxide layer</s0>
<s5>18</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Capa óxido</s0>
<s5>18</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>Chrome oxyde</s0>
<s2>NK</s2>
<s5>19</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG"><s0>Chromium oxides</s0>
<s2>NK</s2>
<s5>19</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>Cobalt oxyde</s0>
<s2>NK</s2>
<s5>20</s5>
</fC03>
<fC03 i1="16" i2="3" l="ENG"><s0>Cobalt oxides</s0>
<s2>NK</s2>
<s5>20</s5>
</fC03>
<fC03 i1="17" i2="3" l="FRE"><s0>Spinelles</s0>
<s5>21</s5>
</fC03>
<fC03 i1="17" i2="3" l="ENG"><s0>Spinels</s0>
<s5>21</s5>
</fC03>
<fC03 i1="18" i2="3" l="FRE"><s0>Composé minéral</s0>
<s5>48</s5>
</fC03>
<fC03 i1="18" i2="3" l="ENG"><s0>Inorganic compounds</s0>
<s5>48</s5>
</fC03>
<fC03 i1="19" i2="3" l="FRE"><s0>Métal transition composé</s0>
<s5>49</s5>
</fC03>
<fC03 i1="19" i2="3" l="ENG"><s0>Transition element compounds</s0>
<s5>49</s5>
</fC03>
<fC03 i1="20" i2="3" l="FRE"><s0>W</s0>
<s4>INC</s4>
<s5>52</s5>
</fC03>
<fC03 i1="21" i2="3" l="FRE"><s0>Cr O</s0>
<s4>INC</s4>
<s5>53</s5>
</fC03>
<fC03 i1="22" i2="3" l="FRE"><s0>Cr2O3</s0>
<s4>INC</s4>
<s5>54</s5>
</fC03>
<fC03 i1="23" i2="3" l="FRE"><s0>66</s0>
<s4>INC</s4>
<s5>56</s5>
</fC03>
<fN21><s1>122</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
<pR><fA30 i1="01" i2="1" l="ENG"><s1>E-MRS 2004 Spring Meeting - Symposium H</s1>
<s3>Strasbourg FRA</s3>
<s4>2004-05-24</s4>
</fA30>
</pR>
</standard>
</inist>
</record>

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Effect of tungsten 0-8 wt.% on the oxidation of Co-Cr alloys

Effect of tungsten 0-8 wt.% on the oxidation of Co-Cr alloys

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