Modeling of microencapsulated polymer shell solidification
- Soane Technologies, Inc., Hayward, CA (United States)
- Lawrence Livermore National Lab., CA (United States)
A finite element transport model has been developed and implemented to complement experimental efforts to improve the quality of ICF target shells produced via controlled-mass microencapsulation. The model provides an efficient means to explore the effect of processing variables on the dynamics of shell dimensions, concentricity, and phase behavior. Comparisons with experiments showed that the model successfully predicts the evolution of wall thinning and core/wall density differences. The model was used to efficiently explore and identify initial wall compositions and processing temperatures which resulted in concentricity improvements from 65 to 99%. The evolution of trace amounts of water entering into the shell wall was also tracked in the simulations. Comparisons with phase envelope estimations from modified UNIFAP calculations suggest that the water content trajectory approaches the two-phase region where vacuole formation via microphase separation may occur.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Soane Technologies, Inc., Hayward, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48; AC03-91SF18601
- OSTI ID:
- 113974
- Report Number(s):
- UCRL-JC-120184; CONF-941144-173; ON: DE96000377; TRN: 95:023170
- Resource Relation:
- Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994; Other Information: PBD: 8 Mar 1995
- Country of Publication:
- United States
- Language:
- English
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