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KMID : 0362419930310020191
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Journal of Korean Academy of Prosthodontics
1993 Volume.31 No. 2 p.191 ~ p.206
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A study on flexure strength of the solder joints formed using various soldering techniques for ceramo-metal alloys
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Kim Jin-Yeoul
Chun Young-Charn
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Abstract
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In order to compare the strength of soldered joints relative to the various sol dering method, soldering processes were performed using Palladium based ceramo-metal alloy(Bong-on 4) and Nickel-Cromium alloy(Vera Bond). The obtained data include difference in strength between presoldering and postsoldering. The data also contain difference among postsoldered groups for 3 difference soldering methods(torch, infrared, Oven). @ES The following results were obtained.
@EN 1. For postsoldering with Pd alloy, the oven-suing group showed the highest strength while the difference in strength between the torch-using group and the infrared machine group was negligible. 2. For Pd alloy with the torch method, postsoldering resulted in the higher strength than presoldering. 3. There was a negligible difference in strength between presoldering and postsoldering when Ni-Cr alloy with torch method is used. 4. Through microscopic study of the fractured surfaces, the torch-using group showed more porosity than both the oven-using and the infrared machine gruops. 5. In terms of fracturing patterns, the oven-using group showed adhesive failure while both the torch and the infrared machine group showed cohesive failure and cohesive-adhesive failure.
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