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Title: Non destructive investigation of ferromagnetic materials using impulse radar
Author: North, Laurence Jotham
ISNI:       0000 0004 2738 3478
Awarding Body: Keele University
Current Institution: Keele University
Date of Award: 2008
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Remediation of deteriorating steel-reinforced concrete structures is a multi-billion dol- lar global problem. Corrosion of embedded steel reinforcing members is the primary cause of the deterioration of these structures. Many .er1.he corrosion products are .. ferrimagnetic and exhibit ferromagnetic resonance (FMR). This thesis describes the design, implementation and testing of two impulse radar systems that exploit FMR to detect and locate ferrimagnetic materials and differenti- ate them from other targets: a free-space system and a transmission line analogue. A novel data processing software solution that interprets data acquired with the hardware systems is also explained. The software allows unequivocal detection and location of ferrimagnetic materials and, in principle, the extraction of intrinsic materials parame- ters from radar signals. The efficacy of the technique and the software and hardware solutions are demonstrated using several synthetic samples. The free space system proves the concept of non-destructive detection and location of ferrimagnetic materials while the transmission line analogue provides a powerful tool for ultra-wideband FMR metrology. Finally improvements to both systems are suggested along with additional potential applications.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available