AFM and KPFM investigation of high strength aluminium brazing sheets
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2015. Postersitzung präsentiert bei ÖPG Jahrestagung 2015, Vienna, Österreich.
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T1 - AFM and KPFM investigation of high strength aluminium brazing sheets
AU - Huszar, Michael
AU - Kremmer, Thomas
AU - Kratzer, Markus
AU - Oberhauser, Paul
AU - Antrekowitsch, Helmut
AU - Teichert, Christian
PY - 2015
Y1 - 2015
N2 - High strength aluminum brazing compounds used in car-cooler systems become susceptible to corrosion after brazing. An intermediate layer has to be inserted to separate the 4xxx filler-material from the 7xxx base-material. The effectivity of this layer in preventing corrosion was investigated using atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). Samples were subjected to a simulated brazing cycle and exposed to a corrosive medium. The investigations revealed the presence of cathodic inclusions in the Al-matrix. Further, a line of up to 3 µm wide holes is formed at the transition between intermediate layer and base material.
AB - High strength aluminum brazing compounds used in car-cooler systems become susceptible to corrosion after brazing. An intermediate layer has to be inserted to separate the 4xxx filler-material from the 7xxx base-material. The effectivity of this layer in preventing corrosion was investigated using atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). Samples were subjected to a simulated brazing cycle and exposed to a corrosive medium. The investigations revealed the presence of cathodic inclusions in the Al-matrix. Further, a line of up to 3 µm wide holes is formed at the transition between intermediate layer and base material.
KW - scanning probe microscopy
KW - kelvin probe force microscopy
KW - aluminium
KW - brazing sheet
KW - corrosion
KW - material science
M3 - Poster
T2 - ÖPG Jahrestagung 2015
Y2 - 1 September 2015 through 4 September 2015
ER -