3 credits
Fall 2025 Lecture Upper DivisionProcessing of engineering materials from powders. Synthesis of metals, ceramics, and polymers in powder form. Characteristics of particulates. Behavior of collections of particles; surface forces, particle agglomeration and dispersion, gelation, particle packing. Consolidation of powders; mechanics of dry flow and compaction, slurry rheology, shaping processes. Densification and microstructural development; geometry, thermodynamics, and kinetics of sintering, liquid-phase sintering, reaction densification, infiltration. Powder processing of composites.
Learning Outcomes1Describe a powder fabrication process from starting reagent to finished powder. interpret a particle size distribution and estimate mean particle size and specific surface area from the data.
2Review an ASTM standard for particulate materials characterization.
3Describe the role of van der Waals interactions in determining structure on the colloidal and macroscopic length scales.
4Differentiate between processing routes more favorable for processing bulk materials versus routes geared towards processing thin films.
5Describe when it is appropriate to process dry powders versus processing powders suspended in a liquid medium.
6Calculate the packing density of bimodal particle size distributions and describe the difference between calculated values and what one might expect to observe in experimental measurements.
7Describe the effects of particle agglomeration on interparticle forces and the packing density of powder compacts.
8Calculate the particle size at which gravitational segregation becomes significant during aqueous colloidal processing.
9Describe how segregation effects may be minimized during aqueous colloidal processing and any advantages and disadvantages associated with the modified process.
10Describe the effects of interparticle forces on powder compact homogeneity and subsequent effects on compact densification.
11Describe the effects of furnace atmosphere on the density, the specific surface area, and the microstructure of a powder compact.