Phase Contrast X-ray Imaging

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Website of the research project: NiWRe-Alloys

This is the website of the NiWRe project, a group effort funded via the M-era.net program. The topic is broadly that of X-ray imaging – specifically phase contrast and related imaging using X-ray gratings. Read more about it here:

In this project, four different electrolytes will be developed for two different applications. One is to find a substitute for hard chrome plating, which is highly toxic and hazardous to the environment and second is to substitute the usage of gold in x-absorber, so that the new absorber is not only cost efficient but also could accomplish a better absorption compared to gold in the region between approx. 65 keV and the K-edge of gold at 82 keV where gold’s dramatic degradation of absorbance capacity usually occurs. For each application field at least one demonstrator (TRL6) will be developed by the end of the project.

The introduction of NiW and NiRe as X-ray absorbing material will have a huge impact for the market introduction of a new medical imaging modality called dark-field imaging through which e.g. diseases related to the degradation of lung alveoli such as chronic obstructive pulmonary disease can be made detectable in an early stage through classic radiography. The substitution of chrome (VI) contributes significantly to environmental protection and better working conditions for employee.

This NiWRe-Alloys project brings four R&D organisations – University of Applied Science Mittweida (HSMW), Insititut für Korrosionsschutz Dresden (IKS), Extreme Light Infrastructure Nuclear Physic (ELI-NP) and Stellenbosch University (SU) – and also two SMEs which are Microworks GmbH (MW) and CMF Oberflächendesign GmbH (CMF) with complementary R&D competencies and knowledge of/access to target markets

The following text will describe each of the work packages in this project. The first work package focuses on the investigation and characterisation of hard chrome layers and gold grids. Both of these substances are used as a reference for our NiW and NiRe coating. NiW/NiRe elctrolytes will be developed in lab scale during the work package 2 period. The electrodeposited coating will be characterised in terms of their hardness, wear and corrosion protection and also their chemical composition. Successful experiments will be repeated during the upscaling project as described in work package 3 to produce demonstrators. Further process optimization in the pre-treatment and coating process are expected. An online monitoring and controlling system for the electroplating processes with integration of the analytics insights from WP2 is developed. In work package 4, the demonstrators for both applications will be validated. For the hard chrome plating substitution, the electrolyte composition and bath parameters will be adjusted to match the individual requirements for the individual specimens. The coated demonstrators will be fully characterised according to the specification sheet for layers. In the other application, standard medical and industrial objects will be used as object of study to assess the grid imaging performance.

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