title: Torch versus oven preceramic soldering of a nickel-chromium alloy.
abstract: Base metal preceramic solder joints have been described as unpredictable and inconsistent in tensile strength. Compared to base metal postoldered joints, presoldering with a gas-oxygen torch produces weaker joints that have increased porosity and voids. This investigation compared the tensile strength of base metal solder joints presoldered with a gas-oxygen torch to that of joints presoldered in a porcelain oven under vacuum. The mean (+/- SD) solder joint tensile strength was 460.0 (+/- 99.4) MPa for the oven-soldered and 520.2 (+/- 37.8) MPa for the torch-soldered specimens. A strong, consistent, void-free preceramic solder joint was produced between a nickel-chromium base and gold solder by both torch- and oven-presoldering techniques; however, preceramic soldering with a torch tended to result in a stronger bond.
authors.affiliation: University of Texas, Health Science Center at San Antonio 78284-7890.
authors.forename: J A
authors.initials: JA
authors.lastname: Sobieralski
authors.forename: E
authors.initials: E
authors.lastname: Schelb
authors.forename: T J
authors.initials: TJ
authors.lastname: Prihoda
mesh_terms: D002516:Ceramics; D002858:Chromium Alloys; D012994:Dental Soldering; D006046:Gold; D016062:Porosity; D013718:Tensile Strength
chemical_list: D002858:Chromium Alloys; D006046:Gold