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Deposition of metallic coatings onto super alloy substrates using pulsed laser deposition techniques

As part of it's contribution to this project Trinity College Dublin collaborated with and external contractor to study a pulsed laser deposition (PLD) technique for deposition of metallic coatings onto super alloy substrates.

A super alloy called Rene 80 was used as target material and Silicon wafer was used as a substrate. High Repetition rate Nd:YAG lasers were used for the pulse deposition experiments. Deposition rates of about 1.8 microns/min (or about 100 microns per hour) were obtained with a target / substrate distance of about 25mm. Good adhesion and stoichoimetry of the deposited material was observed.

Although the SCARF project team decided not to pursue this approach further, the results obtained were interesting. They contributed to an enhanced understanding both of the properties of super alloys and of the potential of the PLD technique for deposition of good quality metallic coatings at high deposition rates. The SCARF partners see PLD as a technique with potential, which is still at an earlier stage of development than magnetron sputtering for the kind of "build up" repair of superalloy materials of interest in this project.

These results will be published in the scientific literature about 2 years after the end of the SCARF project.

In that way these results will be used by the wider materials research community.

Reported by

The Provost, Fellows and Scholars of the College of the Holy and Undivided Trinity of Queen Elizabeth near Dublin or more commonly Trinity College, Dublin (TCD)
Parsons Building, Trinity College
2 Dublin
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