Combinatorial methods have captured the attention of the materials community with the promise of providing new discoveries “faster, better, and cheaper.” We employ magnetron co-sputtering from 3+1 targets to create “libraries” covering wide ranges of alloy compositions. Key for the efficiency of these methods are a massively parallel characterization of the library for specific properties of interest, in contrast to the time-consuming one-composition-at-a-time approach. One of our main focus is to apply these strategies to develop new bulk metallic glass forming alloys by sputtering composition libraries containing of up to six components. Here we take advantage of the typical pseudo binary or ternary characteristics of most alloys alloys, which we represent in alloy targets. High throughput methods are used to determine melting and nucleation temperature, as well as the thermo plastic formability of the various compositions. Furthermore, we use these methods to study solidification of complex alloys in general.
Adhesion, spreading, and survival of fibroblasts cells vary significantly as a function of composition on Au-Cu-Si compositional library films. This allows for rapid scanning of potentially biocompatible alloys.
High throughput characterization of metallic glass film libraries with respect to their thermoplastic forming ability. The highest formability is present at 3 (Au and Cu rich) where the film has been blow molded all the way into the mold cavity. These method allows to quantify glass transition temperature and the determination of the lowest viscosity that can be accessed in the supercooled liquid region.