Goyal A. (Ред.). Second-Generation HTS Conductors

Contents

Contributors

Preface

A. Methods to Produce Biaxially Textured Substrates

1 IBAD TEMPLATE FILMS FOR HTS COATED CONDUCTORS

Paul N. Arendt

1.1 Introduction

1.2 Modification of crystal structure in metal films by ion bombardme

1.3 YBCO HTS films on metal and on YSZ buffered substrates

1.4 Ion beam assisted deposition of YSZ buffers

1.5 Alternate texturing mechanism by low energy IBAD

1.6 Critical current measurements on short length YBCO/IBAD YSZ/Ni-alloy tapes

1.7 Development of longer length YBCO/IBAD YSZ/Ni-alloy coated conductors

1.8 Other IBAD investigations

1.9 IBADMgO

1.10 IBAD template microstructures

1.11 Cost estimate of IBAD MgO templates

1.12 Buffer layers

1.13 Non-IB AD templates for coated conductors

1.14 Summary

References

2 EPITAXIAL SUPERCONDUCTORS ON ROLLING-ASSISTED-BIAXIALLY-TEXTURED-SUBSTRATES (RABiTS)

Amit Goyal

2.1 Introduction

2.2 Biaxially textured metal templates

2.3. Macroscopic texture characterization of biaxilly textyres substrates

2.4 Deposition of the seed layer

2.5 Barrier and cap layer deposition

2.6 YBCO superconductor deposition

2.7 Fabrication of alloy substrates

2.8 Summary

References

3 INCLINED SUBSTRATE DEPOSITION

K. Fujino, K. Ohmatsu, Y. Sato, S. Honjo, and Y. Takahashi

3.1 Introduction

3.2 ISD method

3.3 Tape properties

3.4 Summary

References

4 ISD BY THERMAL EVAPORATION

Markus Bauer

References

B. Methods of YBa2Cu3O7 Deposition and Related Issues

5 PULSED LASER DEPOSITION OF YBa2Cu307 FOR COATED CONDUCTOR APPLICATIONS: CURRENT STATUS AND COST ISSUES

Hans M. Christen

5.1 Introduction

5.2 Basic principles of PLD

5.3 Pulsed laser deposition of YBa2Cu307

5.4 Commercially available equipment

5.5 Issues related to scale-up

5.6 Simplified cost model

5.7 Summary and conclusions

Acknowledgments

References

6 METHODS OF HTS DEPOSITION: THERMAL EVAPORATION

Werner Prusseit

6.1 Introduction

6.2 General features of thermal evaporation for HTS deposition

6.3 PROS and CONS of thermal evaporation

6.4 Large area, long term deposition

6.5 Tape coating

References

7 SPUTTERING OF Y1Ba2Cu307

R. Krupke, M. Azoulay, and G. Deutscher

7.1 The sputtering-technique

7.2 Target material

7.3 Substrates

7.4 Heater

7.5 Deposition parameters

Acknowledgments

References

8 PULSED ELECTRON-BEAM DEPOSITION OF HIGH TEMPERATURE SUPERCONDUCTING FILMS FOR COATED CONDUCTOR APPLICATIONS

K.S. Harshavardhan and M. Strikovski

8.1 Introduction

8.2 Pulsed energy deposition techniques

8.3 Structure and transport of HTS films on RABiTS substrates

8.4 Conclusions

Acknowledgments

References

9 BaF2 POST-DEPOSITION REACTION PROCESS FOR THICK YBCO FILMS

M. Suenaga, V.F. Solovyov, L. Wu, H.J. Wiesmann, and Y. Zhu

9.1 Introduction

9.2 The structure of the YBCO conductors

9.3 The required thickness of YBCO

9.4 The YBCO growth-rate requirement

9.5 Thickness: nucleation kinetics for thick YBCO films

9.6 Growth kinetics: atmospheric and subatmospheric pressure processes

9.7 Summary

Acknowledgment

References

10 ISSUES AND PROGRESS RELATED TO THE CONTINUOUS EX-SITU BaF2 PROCESSING OF LONG-LENGTH YBCO COATED CONDUCTORS

Dominic F. Lee, Keith J. Leonard, Song-Wei Lu, Donald M. Kroeger, and Fredrick A. List III

10.1 Introduction

10.2 ВaF2 ex-situ process

10.3 Computational fluid dynamics simulations of transverse-flow geometry

10.4 Reel-to-reel single-module transverse-flow reaction chamber: stationary YBCO conversion

10.5 Reel-to-reel seven-module transverse-flow reaction chamber: continuous YBCO conversion

10.6 Summary

Acknowledgment

References

11 SOLUTION DEPOSITION OF YBa2Cu307 COATED CONDUCTORS

Paul G. Clem

11.1 Introduction

11.2 Chemical solution deposition

11.3 Sol-gel YBCO approaches

11.4 Approaches to decreased YBCO process time

11.5 Conclusions

References

12 NON-FLUORINE BASED BULK SOLUTION TECHNIQUES TO GROW SUPERCONDUCTING YBa2Cu307 FILMS

M. Parans Paranthaman

12.1 Introduction

12.2 Sol-gel processing

12.3 Electrochemical deposition

12.4 Spray (aerosol) pyrolysis techniques

12.5 Conclusions

Ackowledgments

References

13 JET VAPOR DEPOSITION FOR CONTINUOUS, LOW COST MANUFACTURE OF HIGH TEMPERATURE SUPERCONDUCTING TAPE

B.L. Halpern, T. Tamagawa, and Y. Di

13.1 Introduction

13.2 Principles of jet vapor deposition

13.3 JVD sources for HTS materials

13.4 The E-jet JVD source

13.5 Continuous coating: the JVD stripcoater

13.6 Potential advantages of JVD for HTS manufacture

13.7 High rate metal oxide deposition in the E-jet: nickel ferrite

13.8 Metal oxide and HTC barrier layer via JVD sputter jets

13.9 Challenges in high rate JVD stripcoating

13.10 Summary

References

14 PROCESSING OF LONG-LENGTH TAPES OF HIGH-TEMPERATURE SUPERCONDUCTORS BY COMBUSTION CHEMICAL VAPOR DEPOSITION

Shara S. Shoup and Todd A. Polley

14.1 Introduction

14.2 Combustion chemical vapor deposition

14.3 Deposition of functional materials

14.4 Direction of future research

14.5 Conclusions

Acknowledgments

References

15 MOCVD GROWTH OF YBCO FILMS FOR COATED CONDUCTOR APPLICATIONS

Alex Ignatiev

15.1 Introduction

15.2 Photo-assisted MOCVD

15.3 MOCVD precursors

15.4 Industrial application of photo-assisted MOCVD

Acknowledgments

References

16 LPE PROCESSING FOR COATED CONDUCTOR

Teruo Izumi and Yuh Shiohara

16.1 Introduction

16.2 Preventation of reaction

16.3 Growth in MgO saturated system

16.4 Growth in NiO saturated system

16.5 Conclusion

Acknowledgment

References

С. Deposition of Other HTS Materials

17 EX-SITU PROCESSING OF Tl-CONTAINING FILMS

J.Y Lao, J.H. Wang, D.Z. Wang, S.X. Yang, and Z.F. Ren

17.1 Introduction

17.2 Development of Thallium-1223 films for conductor applications

17.3 Development of Thallium-1212 materials as a possible alternate for the next generation of HTS wires

17.4 Conclusions

Acknowledgments

References

18 EPITAXY OF Hg-BASED HIGH-Tc SUPERCONDUCTING THIN FILMS

Judy Wu

18.1 Introduction

18.2 Fabrication of Hg-HTS films

18.3 Physical properties of Hg-1212 and Hg-1223 films

18.4 Applications of Hg-HTS thin films

18.5 Remaining challenges

Acknowledgments

References

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