Effect of the substrate and of thermophoresis on the acceleration and heating of particles during HVOF spraying
Identifieur interne : 000E96 ( Main/Exploration ); précédent : 000E95; suivant : 000E97Effect of the substrate and of thermophoresis on the acceleration and heating of particles during HVOF spraying
Auteurs : N. Ait-Messaoudene [Algérie] ; A. A. El-Hadj [Algérie]Source :
- Surface & coatings technology [ 0257-8972 ] ; 1998.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Cobalt.
English descriptors
- KwdEn :
Abstract
A theoretical model is used to evaluate the velocity and temperature of a spherical particle during its flight in a HVOF thermal spraying system. The computations are performed for WC-Co particles. Computations show that it is necessary to take into account the presence of the substrate on the flow of the exhaust gases. This effect is important because of the existence of a boundary-layer zone where the velocity of the gases is ultimately zero at the substrate surface. Moreover, thermal forces or thermophoresis due to the temperature gradient in the spraying direction are also shown to have a significant effect on the evolution of the velocity and temperature of the particle for small particle sizes.
Affiliations:
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Le document en format XML
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El-Hadj</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Mechanical Engineering, University of Blida, BP 270 route de soumma</s1><s2>Blida</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Blida</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">98-0445056</idno><date when="1998">1998</date><idno type="stanalyst">PASCAL 98-0445056 INIST</idno><idno type="RBID">Pascal:98-0445056</idno><idno type="wicri:Area/PascalFrancis/Corpus">000313</idno><idno type="wicri:Area/PascalFrancis/Curation">000390</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000321</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000321</idno><idno type="wicri:doubleKey">0257-8972:1998:Ait Messaoudene N:effect:of:the</idno><idno type="wicri:Area/Main/Merge">000F33</idno><idno type="wicri:Area/Main/Curation">000E96</idno><idno type="wicri:Area/Main/Exploration">000E96</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Effect of the substrate and of thermophoresis on the acceleration and heating of particles during HVOF spraying</title><author><name sortKey="Ait Messaoudene, N" sort="Ait Messaoudene, N" uniqKey="Ait Messaoudene N" first="N." last="Ait-Messaoudene">N. Ait-Messaoudene</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Mechanical Engineering, University of Blida, BP 270 route de soumma</s1><s2>Blida</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Blida</wicri:noRegion></affiliation></author><author><name sortKey="El Hadj, A A" sort="El Hadj, A A" uniqKey="El Hadj A" first="A. A." last="El-Hadj">A. A. El-Hadj</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Mechanical Engineering, University of Blida, BP 270 route de soumma</s1><s2>Blida</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Blida</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Surface & coatings technology</title><title level="j" type="abbreviated">Surf. coat. technol.</title><idno type="ISSN">0257-8972</idno><imprint><date when="1998">1998</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Surface & coatings technology</title><title level="j" type="abbreviated">Surf. coat. technol.</title><idno type="ISSN">0257-8972</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Boundary layers</term><term>Cobalt</term><term>Modelling</term><term>Spherical shape</term><term>Spray coatings</term><term>Temperature gradients</term><term>Theoretical study</term><term>Thermophoresis</term><term>Tungsten carbides</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Dépôt projection</term><term>Modélisation</term><term>Thermophorèse</term><term>Tungstène carbure</term><term>Cobalt</term><term>Forme sphérique</term><term>Couche limite</term><term>Gradient température</term><term>Etude théorique</term><term>8115R</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cobalt</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A theoretical model is used to evaluate the velocity and temperature of a spherical particle during its flight in a HVOF thermal spraying system. The computations are performed for WC-Co particles. Computations show that it is necessary to take into account the presence of the substrate on the flow of the exhaust gases. This effect is important because of the existence of a boundary-layer zone where the velocity of the gases is ultimately zero at the substrate surface. Moreover, thermal forces or thermophoresis due to the temperature gradient in the spraying direction are also shown to have a significant effect on the evolution of the velocity and temperature of the particle for small particle sizes.</div></front></TEI><affiliations><list><country><li>Algérie</li></country></list><tree><country name="Algérie"><noRegion><name sortKey="Ait Messaoudene, N" sort="Ait Messaoudene, N" uniqKey="Ait Messaoudene N" first="N." last="Ait-Messaoudene">N. Ait-Messaoudene</name></noRegion><name sortKey="El Hadj, A A" sort="El Hadj, A A" uniqKey="El Hadj A" first="A. A." last="El-Hadj">A. A. 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