Chapter 7. Technology of Casting and Soldering Alloys for Metal-Ceramic Applications

  1. William Smothers
  1. Edward R. Dootz

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320259.ch7

Proceedings of Conference on Recent Developments in Dental Ceramics: Ceramic Engineering and Science Proceedings, Volume 6, Issue 1/2

Proceedings of Conference on Recent Developments in Dental Ceramics: Ceramic Engineering and Science Proceedings, Volume 6, Issue 1/2

How to Cite

Dootz, E. R. (1985) Technology of Casting and Soldering Alloys for Metal-Ceramic Applications, in Proceedings of Conference on Recent Developments in Dental Ceramics: Ceramic Engineering and Science Proceedings, Volume 6, Issue 1/2 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320259.ch7

Author Information

  1. School of Dentistry University of Michigan, Ann Arbor, MI 48109

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1985

ISBN Information

Print ISBN: 9780470374245

Online ISBN: 9780470320259

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Keywords:

  • casting ring;
  • gas torch;
  • postsolder joints;
  • ceramo-metal casting;
  • alloys

Summary

To successfully cast metal-ceramic alloys careful attention must be given to: mold and alloy temperature, sprue diameter and length, metal volume, turns on the casting machine, use of reservoirs, vents or chills, relationship of wax pattern to the end of the casting ring, asbestos liners, W/P ratios, and housekeeping procedures. A recognition of the “Thermal Center” and how to effectively place it outside the critical area of the casting can lead to the elimination of shrinkage porosity, Successful solder joints, especially in the presence of porcelain, is more an art form than a science. However, success is improved by following some basic principles, such as: close proximity of parts, cleanliness of parts, proper use of flux and proper application of heat. Presoldering with a torch is recommended as opposed to postsoldering. If postsoldering is required, then stronger joints are obtained by the torch method as opposed to the oven method.