Abstract
A Co-Ti-W thin film materials library was fabricated by magnetron sputtering. By using automated high-throughput measurement techniques (resistance mapping, automated XRD measurements) and cluster analysis a yet unknown phase region was revealed. The existence region of the new ternary phase is close to the composition Co 60 Ti 15 W 25 . In order to transfer the results from thin film to bulk material, a bulk sample was prepared by arc melting and subsequent heat treatment. Scanning electron microscopy and chemical micro-analysis data support that a yet unknown ternary phase exists in the system Co-Ti-W.
Highlights
Ni-based superalloys are materials of choice for applications as turbine blades for airplane or stationary gas turbines due to their excellent high-temperature stability, creep behavior and chemical resistance [1,2,3]
In order to verify the adaptability of the thin film combinatorial methodology for superalloy subsystems, the Cr-Ni-Re system was studied at 1100 ◦C by some of the present authors [8]
The results found in the thin film materials library are in good agreement with results reported for bulk samples by other groups
Summary
Ni-based superalloys are materials of choice for applications as turbine blades for airplane or stationary gas turbines due to their excellent high-temperature stability, creep behavior and chemical resistance [1,2,3]. In the course of the development of more efficient turbines, a temperature increase leads to an increase of the overall efficiency. This increase in temperature in turn leads to a demand for new materials which can withstand even higher temperatures than Ni-based superalloys are capable of. Combinatorial materials science methods for the synthesis of materials libraries combined with highthroughput characterization techniques are efficient to study less-known or completely unknown material systems with the aim of identifying compositions with interesting properties or new phases [5,6,7]. The results found in the thin film materials library are in good agreement with results reported for bulk samples by other groups
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