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Advances in materials science research. Volume 10 /
| Clasificación: | Libro Electrónico |
|---|---|
| Otros Autores: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Hauppauge, N.Y. :
Nova Science,
©2011.
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| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- PREFACE ; SYNTHETICAL DAMAGES ON METAL SURFACE BY CAVITATION EROSION ; Abstract ; Nomenclature ; Abbreviations: ; 1 Introduction ; 2 Mechanical Effect ; 2.1 Mechanical impactions
- microjet and shock wave ; 2.2 Mechanical damages on metal surfaces ; 2.2.1 Phenomenological studies on damages ; I. Plastical deformations ; II. Brittle fractures ; III. Damages for mass loss
- Work hardening process ; 2.2.2 Metallurgical studies on the damage ; I. Crystal structure ; II. Grain size ; III. Phase transformation.
- 2.2.3 Damages on Austenite and Duplex Stainless Steels 2.3 Cavitation erosion models ; 2.3.1 Empirical functions ; 2.3.2 Analytical models ; 3 Thermal Effects ; 3.1 High temperature in a collapsing bubble ; 3.1.1 Calculated high temperature ; 3.1.2 High temperature measurement ; 3.2 Thermal damages on metal surface ; 3.2.1 Damaged ring area around an erosion pit ; 3.2.2 Nanocrystallized structures ; 3.2.3 Spherical debris in solutions ; 3.3 Discussions on thermal effect ; 4 Corrosion Effects ; 4.1 Measurement methods and results.
- 4.2 Passivation in cavitation 4.2.1 Passivation theory ; 4.2.2 Factors on passivation in cavitation ; I. Cavitation flow ; II. pH values ; III. Chloride ions ; IV. Bicarbonate ions ; 4.3 Localized Chemical reactions ; 4.3.1 Free radicals in cavitation ; 4.3.2 Radicals chain reactions on the wall ; 5 Synergistic Effect ; 5.1 Experimental methods & results ; 5.2 Erosion-corrosion mechanisms ; 5.2.1 Erosion on corrosion ; I. Film rupture ; II. Flow enhanced corrosion ; III. Strain induced anodic corrosion ; IV. Local acidification in erosion pit.
- 5.2.2 Corrosion on erosion I. Dissolution of surface work harden layer ; II. Corrosive cracks ; III. Preferential matrix dissolution ; 5.3 Erosion-corrosion maps ; 5.3.1 Determination of erosion rate and corrosion rate ; I. Determination of erosion rate ; II. Determination of corrosion rate ; 5.3.2 Erosion-corrosion map ; 5.4 Other synergistic effect ; 5.4.1 Thermo-galvanic effect ; 5.4.2 Particle abrasion-erosion ; 6 Conclusion ; Acknowledgment ; References ; POLYMERIC INTRACORPOREAL DEVICES FOR THE MANAGEMENT OF NEUROLOGICAL DISORDERS ; Abstract.
- 1 Introduction 2 Polymer-Based Implantable Devices for Major CNS Disorders ; 2.1 Intracranial implants ; 2.1.1 Drug delivery approaches employed to traverse the blood brain barrier ; 2.1.1.1 Ethylene vinyl acetate copolymers AVAc as a prototype biocompatible polymer employed for local drug delivery to the brain ; 2.1.1.2 Silk-based polymers as an alternative to synthetic drug delivery-systems for the treatment of epilepsy ; 2.1.2 Application of polymer-based implantable devices in Parkinson's disease.