Erhardson S
Acta Odontol Scand. 1983 Oct;41(5):293-9. doi: 10.3109/00016358309162338.
The occurrence of pores and fatigue fractures in flame-soldered joints of dental gold was measured using fractograms and metallographic preparations. All soldered joints contained pores localized mainly in the solder material adjacent to casting/solder and solder/solder interfaces. The porosity portion of these regions was 20-40 volume per cent, consisting chiefly of pores smaller than 0.1 mm. The fatigue fractures were nearly always situated in the same regions or along the casting surfaces themselves.
采用断口金相图和金相制备方法，测量牙科用金火焰焊接接头中气孔和疲劳裂纹的出现情况。所有焊接接头中的气孔主要集中在靠近铸件/焊料以及焊料/焊料界面的焊料材料中。这些区域的气孔率为20% - 40%（体积百分比），主要由小于0.1毫米的气孔组成。疲劳裂纹几乎总是出现在相同区域或沿着铸件表面本身。
