Time-Resolved Spectroscopy of Condensed Matter

Contains reports on three research projects.Joint Services Electronics Program (Contract DAAG29-78-C-0020

Optical Spectroscopy of Disordered Materials

Contains reports on two research projects.Joint Services Electronics Program (Contract DAAG29-83-K-0003

Graphoepitaxy of Colloidal Crystals

Contains reports on two research projects.Joint Services Electronics Program (Contract DAAL03-86-K-0002)Joint Services Electronics Program (Contract DAAL03-89-C-0001

Graphoepitaxy of Colloidal Crystals

Contains reports on two research projects.Joint Services Electronics Program (Contract DAAL03-86-K-0002

Optical Spectroscopy of Disordered Materials and X-Ray Scattering from Surfaces

Contains reports on two research projects.Joint Services Electronics Program (Contract DAAG29-83-K-0003

Time-Resolved Spectroscopy of Condensed Matter

Contains a report on one research project.Joint Services Electronics Program (Contract DAAG29-80-C-0104)National Science Foundation (Grant DMR78-23555

Time-Resolved Spectroscopy of Condensed Matter

Contains reports on three research projects.Joint Services Electronics Program (Contract DAAG29-78-C-0020)National Science Foundation (Grant DMR78-23555)National Science Foundation (Grant DMR76-80895

Time-Resolved Spectroscopy of Condensed Matter

Contains reports on three research projects.Joint Services Electronics Program (Contract DAAG29-78-C-0020)Joint Services Electronics Program (Contract DAAG29-80-C-0104)National Science Foundation (Grant DMR78-23555)National Science Foundation (Grant DMR78-24185

A new mathematical model for nucleation of spherical agglomerates by the immersion mechanism

Initial wetting of crystals by binder droplets is a key rate process in spherical agglomeration, however there are no models to predict the kinetics and formation of agglomerate nuclei. Two new mathematical models are introduced for agglomerate nucleation by an immersion mechanism; immersion rate limited model and collision rate limited model. The agglomerate nucleation number developed in this work predicts different regimes; immersion rate limited, collision rate limited and intermediate. In an immersion rate limited regime, agglomerate size increases with square root of time. In a collision rate limited regime, size increases linearly with time if the bulk crystal volume fraction, φPb, is constant, or with an exponential decay rate for batch crystallisation with decreasing φPb. The timescale for nucleation is less than ten minutes for a broad range of conditions, significantly less than most crystallisation timescales. These models have great promise for population balance modelling and spherical agglomeration optimisation

Microstructure Fabrication

Contains reports on seven research projects.National Science Foundation (Grant ENG78-10436)M.I.T. Sloan Fund for Basic ResearchJoint Services Electronics Program (Contract DAAG29-78-C-0020)U.S. Navy - Office of Naval Research (Contract N00014-79-C-0908)M.I.T. Cabot FundLawrence Livermore Laboratory (Subcontract 206-92-09)National Science Foundation (Grant DMR78-23555