Non-linear dynamics and pattern selection at the crystal-melt interface. Final report, September 1, 1984--February 28, 1998
Pattern formation at the solidifying crystal-melt interface was investigated with a model binary alloy system of the molecular crystal succinonitrile doped with the laser dye Coumarin 152. Videomicroscopy and computerized digital image analysis provided detailed data for quantitative comparison with theoretical predictions. Application of a single localized laser pulse or a row of UV spots to the interface during solidification allowed for direct measurements of pattern stability. These thermal perturbations also resulted in dramatic modifications of the observed solidification patterns, suggesting that the controlled thermal perturbation approach may allow the microstructure of metallic alloys to be controlled during solidification.
- Research Organization:
- City Univ. of New York, Research Foundation, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- FG02-84ER45132
- OSTI ID:
- 661605
- Report Number(s):
- DOE/ER/45132-T4; ON: DE98005978; TRN: AHC29814%%135
- Resource Relation:
- Other Information: PBD: [1998]
- Country of Publication:
- United States
- Language:
- English
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