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Dynamic Characterization in Advanced Manufacturing

  • Robert L. Snyder (a1) and Bin-Jiang Chen (a1)

Abstract

The coming era of reduced defense funding will dramatically alter the way in which advanced materials develop. In the absence of large funding researchers must concentrate on reducing the time that the R&D of a new materia) consumes. One way in which speed may be achieved is via the development of very fast dynamic characterization procedures which can rapidly and intelligently monitor and optimize the formation of a desired microstructure. Another potential advantage to this approach is its ability to characterize the actual amount of material which goes into a final product; permitting a rapid transition from R&D to manufacturing by avoiding the problems associated with scale-up. Example high-temperature dynamic characterization procedures have been applied to the problem of trying to improve the current carrying capacity of the YBa 2 Cu 3 O 7-8 ceramic superconductor by melt-texturing. These procedures have led to a technique for the preparation of specimens with J c on the order of 10,000 A/cm2.

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References

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1. Taylor, J. A. T., Sainamthip, P., and Dockery, D. F., “Sintering time and temperature for Ba2YCu3O7-δ superconductors”; Mater. Res. Soc. Symp. Proc. 99, pp. 663-66 (1988).
2. Jin, S., Tiefel, T. H., Sherwood, R. C., Davis, M. E., van Dover, R. B., Kammlott, G. W., Fastnacht, R. A., Keith, H. D., “High critical currents in Y-Ba-Cu-0 superconductors,” Appl. Phys. Lett. 52[24] 2074-6 (1988).
3. Jin, S., Tiefel, T. H., Sherwood, R. C., van Dover, R. B., Davis, M. E., Kammlott, G. W., “Melt-textured growth of polycrystalline YBa2Cu30rs with high transport Jc at 77 K,” Phys. Rev. B. Condens. Matter 37 7850-3 (1988).
4. Salama, K., Selvamanickam, V., Gao, L., and Sun, K., “High current density in bulk YBa2Cu30* superconductor,” Appl. Phys. Lett. 54[23] 2352-4 (1989).
5. Kase, J., Shimoyama, J., Yanagisawa, E., Kondoh, S., Matsubara, T., Morimoto, T., and Suzuki, M., “Preparation of Y-Ba-Cu-O superconductors with high critical current density by unidirectional melt solidification,” Jpn. J. Appl. Phys. Part 2 29[2] 277-L279 (1990).
6. Gobel, H. E., “The use and accuracy of continuously scanning position-sensitive detector data in X-ray powder diffraction”, Adv. X-Ray Anal. 24, 123138 (1982).
7. Rodriguez, M.A., Chen, B.J., and Snyder, R.L., “The Formation Mechanism of Melt-Textured YBa2Cu3O7-δ ,” Physica C 195 185194 (1992).
8. Snyder, R.L., Rodriguez, M.A., Chen, BJ., Matheis, D.P., Gobel, H.E., Zoro, G., and Seebacher, B., “Analysis of YBa2Cu307°5 Peritectic Reactions and Orientation by High-Temperature XRD and Optical Microscopy,” Adv. X-ray Anal. 35, 623632 (1992).
9. Chen, B.J., Rodriguez, M.A., Misture, S.T., and Snyder, R.L., “Direct Observation of Textured YBa2Cu307»8 Crystal Growth form the Melt,” Physica C 198 118124 (1992).
10. Rodriguez, M.A., Snyder, R.L., Chen, B.J., Matheis, D.P., Misture, S.T., Frechette, V.D., Zorn, G., Gobel, H.E., and Seebacher, B., “The High-Temperature Reactions of YBa2CLn07“6,” Physica C, 205 4350 (1993).
11. Chen, B.J., Rodriguez, M.A., Misture, S.T., and Snyder, R.L., “Effect of Undercooling Temperature on the Solidification Kinetics and Morphology of YBCO During Melt Texturing,” Physica C 217 367375 (1993).
12. Aselage, T., and Keefer, K., “Liquidus relations in Y-Ba-Cu oxides,” J. Mater. Res. 3[6] 1279-91 (1988).
13. Roth, R. S., Davis, K. L., and Dennis, J. R., “Phase equiiibria and crystal chemistry in the system Ba-Y-Cu-OAdv. Ceram. Mater. 2[3B] 303-12 (1987).
14. Roth, R. S., Rawn, C. J., Beeca, F., Whitler, J. D., and Anderson, J. O., “Phase equilibria in the system Ba-Y-Cu-O-CO2 in air“; pp. 1426 in Ceramic Superconductors II. Edited by Yan, M. F.. American Ceramic Society, Westerville, OH, 1988.
15. Lee, B. and Lee, D. N., “Thermodynamic evaluation for the Y2O3-BaO-CuOx system,” J. Am. Ceram. Soc, 74[1] 7884 (1991).
16. Lay, K. W. and Renlund, G. M., “Oxygen pressure effect on the Y203-BaO-CuO liquidus,” J. Am. Ceram. Soc. 73[5] 1208-13 (1990).
17. Matheis, D. P., Misture, S. T. and Snyder, R. L., “Melt—Texture Processing and High-Temperature Reactions of Bi-2212 Thick Films,” Physica C 217 [3&4] 319325 (1993).
18. Snyder, R. L., “The Use of Reference Intensity Ratios in X-ray Quantitative Analysis,” Powder Diffraction, 7[4] 186193 (1992).

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