Identification and characterisation of materials by broadband ultrasonic attenuation analysis
| Autor: | S. Barker, A.R. Jones, J.B. Hull, C.M. Langton |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
chemistry.chemical_classification
Materials science Acoustics Metals and Alloys Polymer Industrial and Manufacturing Engineering Signature (logic) Computer Science Applications Pulse (physics) Time of flight chemistry Modeling and Simulation Component (UML) visual_art Ceramics and Composites visual_art.visual_art_medium Forensic engineering Ultrasonic sensor Ceramic Porosity |
| Zdroj: | Journal of Materials Processing Technology. 56:148-157 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/0924-0136(96)85100-4 |
| Popis: | Ultrasound attenuation analysis has been demonstrated as a cheap, reliable method of identifying and characterising polymeric materials and components, which can assist in the separation and reclamation of thermoplastics from polymer waste streams. Material/Component broadband ultrasonic attenuation measurement, and the measurement of the time of flight of an ultrasonic pulse, in either pulse echo or pulse through transmission mode, can be combined to attain a signature of the material under investigation. The HL (Hull/Langton) signature is independent of component dimensions, and hence, is a powerful tool for the identification of components of complex shape where access to all surfaces may be restricted. The results presented demonstrate the ability of the technique to identify a range of different polymers, including reinforced materials. The approach adopted is not confined solely to polymers, but can also be used to identify the levels of porosity in ceramic pottery, including both open and closed cell pores. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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