Grain Boundary Precipitation in Cu-Fe-Co Bicrystals

EFFECT OF GRAIN-BOUNDARY STRUCTURE ON STRESS CORROSION CRACKING IN Cu-Al ALLOY BICRYSTALS

SEGREGATION AT SPECIAL GRAIN BOUNDARIES IN Fe-Si ALLOY BICRYSTALS

The segre ation of silicon to the C=3, 112) and C=S, (013) symmetrical grain boundaries 1 was studied in well-fefined bicrystals of an Fe-l .9 at%Si alloy annealed in the range 773 1173 K using Auger electron spectroscopy. The segregation enthal y, AI1 = -8.1 * 0.5 kJ/mol, and entropy, AS = -69 r 0.4 i/(mol K), were determined for the (013f grain boundary in the temperature range 973 1173 K. Fo...

Imaging grain boundary grooves in hard-sphere colloidal bicrystals.

Colloidal particles were sedimented onto patterned glass slides to grow three-dimensional bicrystals with a controlled structure. Three types of symmetric tilt grain boundaries between close-packed face-centered-cubic crystals were produced: Σ5(100),Σ17(100), and Σ3(110). The structure of the crystals and their defects were visualized by confocal microscopy, and characterized by simple geometri...

Phenomenology and Mechanism of Grain Boundary Sliding in Zinc Bicrystals

CHARGED GRAIN-BOUNDARIES IN n-Ge BICRYSTALS

Germanium bicrystals with two types of low-energy symmetric tilt boundaries, Z 9 and Z 1 1 (CSL model classification) were grown. Current-voltage characteristics of grainboundaries were measured in the temperature range 77 K-420 K. Potential barriers were found only at Z 1 1 boundaries in n Ge which confirms the theoretical predictions of the atomic structure of these boundaries [I]. From the e...