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Title: Incorporation of laser ablation into a PIXE system in order to study metallurgy and corrosion products on archaeological objects
Author: Abraham, Meg
Awarding Body: University of Oxford
Current Institution: University of Oxford
Date of Award: 2013
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This work demonstrates the set up and testing of a laser ablation system incorporated into a Particle Induced X-ray Emission Beam line in order to expose bare metal for analysis. The setup allows for X-ray analysis of the composition of the objects without large scale or visible damage to the patina on the object. In some instances the process also allows for some analysis of the corrosion products that make up the patina on the objects. The process is developed as a method for handling a specific class of archaeological objects which are not suited to sampling for various reasons. The aim is to minimize invasive testing of these objects while gaining information about their composition. Using this technique it is possible to infer something about the bulk makeup of the corrosion products on the surface of the objects. It also allows for a good quantitative understanding of the trace elements in the underlying metal substrate that remains below the corroded surface in most cases. This process is not intended to produce exact descriptions of the mineralogical makeup of the corrosion products that form the patina on the object, such as those which can be obtained through metallurgical cross-sectioning. Further it will not yield good quantitative analysis of the trace elements in corrosion products like those obtained using synchrotron radiation. Finally this technique cannot give detailed information regarding the metallurgical structure of the base metal composition of the object again like the data obtained using cross-sections.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available