Measurement of grain boundary triple line energy in copper |
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Authors: | B Zhao JCh Verhasselt LS Shvindlerman G Gottstein |
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Affiliation: | 1. Institut für Metallkunde und Metallphysik, RWTH Aachen University, 52056 Aachen, Germany;2. Sparing Röhl Henseler, Rethelstr. 123, 40237 Düsseldorf, Germany;3. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow District 142432, Russia;4. State Technological University, Moscow Institute of Steel and Alloys, Russia |
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Abstract: | Recent studies have demonstrated that grain boundary triple junctions are crystal defects with specific thermodynamic and kinetic properties. In this study we address the energy of triple lines. Previously, a geometrical model was proposed to determine the grain boundary line tension. The current study introduces a thermodynamically correct approach which allows direct and precise measurement of the triple line energy. The experimental technique utilizes the measurement of the surface topography of a crystal in the vicinity of a triple junction by atomic force microscopy. The grain boundary triple line tension of a random triple line in a copper tricrystal was measured to be 6.3 ± 2.8 × 10?9 J m–1. |
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