SOLDERING TECHNIQUES ARE OFTEN USED TO AVOID DIFFICULTIES WHICH ARISE IN ACCURATELY CASTING LARGE-SPAN DENTAL BRIDGES.

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: N/A
Agency Tracking Number: 3141
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1985
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Ultrastructure, Inc.
1850 N. Greenville Ave.140, Richardson, TX, 75081
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 R. F. PINIZZOTTO
 PRINCIPAL INVESTIGATOR
 (214) 644-1271
Business Contact
Phone: () -
Research Institution
N/A
Abstract
SOLDERING TECHNIQUES ARE OFTEN USED TO AVOID DIFFICULTIES WHICH ARISE IN ACCURATELY CASTING LARGE-SPAN DENTAL BRIDGES. TO AVOID THIS PROBLEM, SUBUNITS ARE CAST AND ASSEMBLED BY SOLDERING. A DETAILED UNDERSTANDING OF THE ALLOY/SOLDER INTERFACE DOES NOT EXIST. THERE ARE CONFLICTING REPORTS ON ALLOY/SOLDER EPITAXY AND ON THE FORMATION OF INTERFACIAL PHASES. THIS STUDY WILL CORRELATE THE MECHANICAL PROPERTIES OF SEVERAL DENTAL ALLOY/SOLDER INTERFACES WITH THE MICROSTRUCTURES OBSERVED BY CROSS-SECTIONAL TRANSMISSION ELECTRON MICROSCOPY (XTEM). FIVE ALLOYS WITH VARYING AMOUNTS OF AU AND PD WILL BE JOINED USING SIMULATED PRECERAMIC AND POSTCERAMIC SOLDERING TECHNIQUES. THE ALLOY/SOLDER STRENGTH WILL BE MEASURED USING THREE-POINT FLEXURAL BENDING. THE MICROSTRUCTURE WILL BE EXAMINED USING XTEM. THE RESULTS OF THIS STUDY SHOULD PROVIDE A SOLID EXPERIMENTAL BASIS FOR THE NATURE OF THE ALLOY/SOLDER INTERFACE AND ENABLE MATERIALS SCIENTISTS TO TAILOR ALLOY/SOLDER COMBINATIONS TO OPTIMIZE THEIR IMPORTANT PARAMETERS. PHASE II OF THIS PROGRAM WILL APPLY THE PRINCIPLES LEARNED IN PHASE I TO THE DEVELOPMENT OF NEW ALLOY/SOLDER COMBINATIONS. IN ADDITION, THE TECHNIQUES DEVELOPED UNDER PHASE I WILL BE EXTENDED TO OTHER DENTAL

* information listed above is at the time of submission.

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