Accueil
Résultat de la recherche
3 résultat(s) recherche sur le tag 'défaut''
Ajouter le résultat dans votre panier Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche
Applications of X-ray diffraction and fluorescence techniques in coatings industries / G. Bathiri in PAINTINDIA, Vol. LI, N° 9 (09/2001)
[article]
Titre : Applications of X-ray diffraction and fluorescence techniques in coatings industries Type de document : texte imprimé Auteurs : G. Bathiri, Auteur Année de publication : 2001 Article en page(s) : p. 33-40 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau revêtement' Peinture Feuil 'Analyse chimique' Pigment quantitative' qualitative' 'Détection défaut' Cristallinité surface' 'Diffraction RX' 'Spectrométrie fluorescence Index. décimale : 667.9 Revêtements et enduits Résumé : X-ray diffraction spectroscopy (XRD) and X-ray fluorescence spectroscopy (XRF) are very useful techniques in the characterisation of materials. In XRD, the angle of diffraction of X-ray is measured after allowing X-rays to be incident on the material under testing. The distance between layer of atoms (d) then can be calculated using Bragg's equation. Plot of intensity vs d - value gives XRD spectrum. In XRF, X-rays of high wavelength are emitted by the specimen as a result of transition of electrons between orbitals when bombarded by low wavelength X-rays. XRF spectrum is a plot of intensity as a function of either energy or wavelength. XRD & XRF spectra are characteristics of materials and form the basis of their analysis. In coatings XRD is useful in establishing the identity and determining the purity of pigments. The technique is useful for analysis of polymorphic forms in titanium dioxides (rutile and anatase) and copper phthalocyanines (alpha, beta and gamma). XRD has also been used in the determination of identity and amount of pretreatment on metal or in general, crystalline coatings on substrate. XRD also finds use in identifying coating defects. XRF can act as a supporting tool to XRD and can be useful in determination of various elements used in coatings in wider range from ppm to 100%. Both XRD and XRF are useful in coating industry as research, quality control and problem analysis tool. Although these techniques are expensive, their simplicity of operations, speed and ability to give selective information make them a very powerful analytical tool for study of coatings. Note de contenu : - INSTRUMENTATION FOR X-RAY TECHNIQUES
- X-RAY DIFFRACTION : Bragg's law
- APPLICATIONS OF X-RAY DIFFRACTION ANALYSIS : Identification of pigments - Quantitative analysis of pigment mixtures - Determination of anatase TiO2 content in rutile TiO2 - Study of polymorphism - Use of XRD for tracking coating defect - Characterisation of metal pretreatment and other thin coatings - Crystallinity of polymers - Particle size - Monitoring of chemical reactions.
- X-RAY FLUORESCENCE SPECTROSCOPY : Qualitative analysis - Quantitative anlaysis
- APPLICATIONS OF X-RAY FLUORESCENCE SPECTROMETRY : Support for X-ray diffraction analysis - Analysis of elements in solution - Quality control
- ADVANTAGES AND DISADVANTAGES OF XRFPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12457
in PAINTINDIA > Vol. LI, N° 9 (09/2001) . - p. 33-40[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 001270 - Périodique Bibliothèque principale Documentaires Disponible Detecting separations in sandwich panels with shearography / Rainer Hubert in JEC COMPOSITES MAGAZINE, N° 32 (05/2007)
[article]
Titre : Detecting separations in sandwich panels with shearography Type de document : texte imprimé Auteurs : Rainer Hubert, Auteur ; Roman Berger, Auteur Année de publication : 2007 Article en page(s) : p. 59-60 Langues : Anglais (eng) Tags : 'Matière plastique' 'Industrie aéronautique' Application Cisaillographie 'Défaut interne' 'Détection défaut' 'Structure nid abeille' 'Plastique alvéolaire' 'Panneau sandwich' 'Matériau composite' Délaminage Index. décimale : 668.4 Plastiques, vinyles Résumé : Steinbichler Optotechnik develops and manufactures shearography systems for production and in-field service to detect delaminations in composites and sandwich panels with foam-and-honeycomb core. These systems place the object under inspection under a minor load, far below the load in real conditions. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14191
in JEC COMPOSITES MAGAZINE > N° 32 (05/2007) . - p. 59-60[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 007184 - Périodique Bibliothèque principale Documentaires Disponible Overall control system for injection molding process / Y. Yang in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 1 (03/2012)
[article]
Titre : Overall control system for injection molding process Type de document : texte imprimé Auteurs : Y. Yang, Auteur ; K. Yao, Auteur ; F. Gao, Auteur Année de publication : 2012 Article en page(s) : p. 40-59 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection Tags : 'Moulage injection' 'Système contrôle trois couches' 'traitement avancé paramètres commande' 'Paramètre profil' 'Détection défaut' 'Contrôle qualité' Index. décimale : 668.9 Polymères Résumé : A multi-layer injection molding machine control system is proposed in this paper. The first layer, an advanced process parameter control layer, provides accurate and robust control of key process variables. The second layer consists of two modules, a profile setting layer determining the shapes of set-point profiles for the key process variables, to achieve an evenly distributed part quality along the flow directions; and a process fault detection and diagnoses system monitoring the operation of injection molding process. The third layer, a quality control layer, consists of a quantitative quality prediction model and a quality controller. This final layer provides a mechanism for closed-loop control of certain part quality. The related work that has been conducted on these three layers is discussed extensively in this paper, and the future work is introduced as well. Note de contenu : - EXPERIMENTAL SETUP : Advanced process control system - Key parameters control performance
- KEY PARAMETERS FROFILE SETTING SYSTEM : Profile setting of injection velocity - Profile setting of packing pressure
- PROCESS MONITORING SYSTEM : PCA and PLS anlaysis - Stage-based statistical monitoring of injection molding process (Lu et al. 2004, 2004, 2005)
- CLOSED-LOOP QUALITY CONTROL SYSTEM : Weight prediction using PCR model - Overall weight control scheme - Closed-loop weight control resultsDOI : 10.3139/217.2501 En ligne : https://drive.google.com/file/d/1-jwiFufN82c9Dvsh4FTccjrvZalmpB8N/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13720
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 1 (03/2012) . - p. 40-59[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 13722 - Périodique Bibliothèque principale Documentaires Disponible