Assessment of elastic properties of coatings by three-point bending and nanoindentation / Tao Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 3 (05/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 3 (05/2011) . - p. 355-361 Titre : Assessment of elastic properties of coatings by three-point bending and nanoindentation Type de document : texte imprimé Auteurs : Tao Zhou, Auteur ; Pulin Nie, Auteur ; Heping Lv, Auteur ; Qiulong Chen, Auteur ; Xun Cai, Auteur Année de publication : 2011 Article en page(s) : p. 355-361 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Elasticité Flexion trois points Nanoindentation Pulvérisation thermique Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : The elastic properties of a thermally sprayed coating were determined by a three-point bending (3PB) test and nanoindentation, but different results were obtained by the two methods. The microstructure revealed by scanning electron microscopy shows the existence of pores which decrease the overall resistance of the coating to elastic deformation. Therefore, the overall mechanical properties determined by the 3PB test are influenced by pores. On the other hand, the mechanical properties of the materials determined by nanoindentation are rarely influenced by pores, as indentations are normally made far away from pores. As a result, the Young’s modulus determined by the 3PB test is lower than that determined by nanoindentation. Selection of the method to determine the Young’s modulus of the coating must be carried out with careful consideration. Note de contenu : - EXPERIMENTAL DETAILS : Sample preparation - Mechanical tests and microstructure evaluation. - COMPOSITE PLATE THEORY - RESULTS : Young's modulus by 3PB test - Young's modulus by nanoindentation. DOI : 10.1007/s11998-010-9313-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9313-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11675 [article]

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Characterization and adhesion strength study of detonation-sprayed MoB–CoCr alloy coatings on 2Cr13 stainless steel substrate / Heping Lv in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 6 (11/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 6 (11/2010) . - p. 801-807 Titre : Characterization and adhesion strength study of detonation-sprayed MoB–CoCr alloy coatings on 2Cr13 stainless steel substrate Type de document : texte imprimé Auteurs : Heping Lv, Auteur ; Pulin Nie, Auteur ; Yonggen Yan, Auteur ; Jun Wang, Auteur ; Baode Sun, Auteur Année de publication : 2010 Article en page(s) : p. 801-807 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Alliages Caractérisation Chrome Cobalt Diffractométrie de rayons X Eléments finis, Méthode des Microscopie électronique à balayage Microscopie électronique en transmission Molybdène Revêtement métallique Index. décimale : 667.9 Revêtements et enduits Résumé : A novel MoB–CoCr alloy coating was deposited onto stainless steel (2Cr13) substrate using a detonation gun (D-gun) spraying technique. Microstructures of the powder and coating were investigated by X-ray diffraction (XRD), scanning election microscopy (SEM), and transmission electron microscopy (TEM), and a quantitative determination of the adhesion strength of the coating was calculated by combination of modified four-point bending (4PB) test and finite element analysis (FEA) simulation. The results show that the coating mainly consists of ternary transition metal boride matrix phases (CoMo2B2, MoCoB) and binary borides (MoB and CrB). Nanocrystalline grains with a size of 50–100 nm were observed in the coating. The average energy release rate and phase angle are 191.2 J m−2 and 41.7º, respectively, which show strong bond strength compared to other reported values. DOI : 10.1007/s11998-009-9189-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9189-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10408 [article]

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Interfacial adhesion measurement of a ceramic coating on metal substrate / Pulin Nie in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 3 (05/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 3 (05/2010) . - p. 391-398 Titre : Interfacial adhesion measurement of a ceramic coating on metal substrate Type de document : texte imprimé Auteurs : Pulin Nie, Auteur ; Heping Lv, Auteur ; Tao Zhou, Auteur ; Xun Cai, Auteur ; Paul K. Chu, Auteur Année de publication : 2010 Article en page(s) : p. 391-398 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Eléments finis, Méthode des Interfaces (Sciences physiques) Mesures physiques Revêtements:Peinture Tags : 'Adhésion  interfaciale'  Revêtement  'Recourbement  trois  points'  'Taux  rejets  énergie'  'Analyse  éléments  finis' Index. décimale : 667.9 Revêtements et enduits Résumé : The interfacial adhesion measurement of a ceramic coating on a metal substrate is studied by three-point bending (3PB) technique. In the measurement, interfacial cracks are induced during the 3PB test, and the interfacial energy release rate is calculated from the released energy per unit crack surface area during crack extension under the fixed displacement conditions. A finite element analysis (FEA) model encompassing the plastic behavior of the metal substrate is developed to simulate the 3PB test and extract the energy data. The inputs to the FEA model include the crack length, the maximum and critical loads corresponding to crack initiation, and the mechanical properties of the coating and substrate. A MoB/CoCr ceramic coating/stainless steel substrate system is investigated by the technique for demonstrating the utility of the technique. DOI : 10.1007/s11998-009-9192-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9192-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9818 [article]

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