Synthesis of bulk amorphous and nano-crystalline materials by spray forming

Bulk amorphous and nanocrystalline metallic materials have been observed to possess excellent mechanical and physical properties. The conventional process routes to synthesize such materials are restricted by their ability to achieve rapid solidification which limits the dimensions of the materials produced. In the last ten years, spray forming has been used to avoid these limitations by using its layer by layer deposition of undercooled droplets. The available literature indicates that the opportunities provided by this process can be utilized to produce bulk materials in a single step. In the present paper, an attempt has been made to review the developments in the area of spray forming of amorphous and/or nanocrystalline materials. The effect of process parameters, droplet size distribution in the spray, the thermal conditions of droplets prior to deposition and the deposition surface conditions have been discussed in detail. It has been demonstrate that the layer by layer deposition of undercooled droplets of glass forming alloys on a relatively cold deposition surface is the suitable condition to achieve amorphization/nanocrystallization. A critical analysis of the process parameters and the results has been made based on the composition, glass forming ability and possible mechanisms of microstructural evolution

High-Throughput Exploration of Evolutionary Structural Materials

Abstract While experimental high-throughput and computational methods exist for the development of functional materials, structural materials are still being developed on the base of experience, stepwise prediction and punctual support of computational models. As a result, many major breakthroughs have been and still are achieved by coincidence under non-intuitive conditions. Experimental high throughput methods allow to explore large process windows where no prediction is possible due to lack of existent data. This work proposes the high throughput method “Farbige Zustände” as a novel approach for the experimental exploration of structural materials. New methods for sample synthesis, treatment and characterization are developed as well as computational methods for ad-hoc data analysis, search and experiment planning.</jats:p

Data for: A model for the drag and heat transfer of spheres at high temperature differences

calculated drag coefficients and heat transfer coefficients of this study for different sphere diameters, temperatures and flow velocities for Helium and Nitrogen