Wavy and rough cracks in silicon
SCIE
SCOPUS
- Title
- Wavy and rough cracks in silicon
- Authors
- Deegan, Robert D.; Chheda, Shilpa; Patel, Lisa; Marder, M.; Swinney, Harry L.; Kim, Jeehoon; de Lozanne, Alex
- Date Issued
- 2003-06
- Publisher
- American Physical Society
- Abstract
- Single-crystal silicon exhibits a strong preference to cleave along a few certain planes, but in experiments we observe wavy cracks with almost no evidence of a preferred fracture direction. Furthermore, we find that the fracture surface is an anisotropic and self-affine fractal over five decades in length scale in the direction of the crack with a roughness exponent of 0.78. In our experiments a 1-4 cm wide strip of single-crystal silicon is heated to 378degreesC and lowered into a 20degreesC water bath at speeds of 0.2-5 cm/s. The thermal gradient produces cracks that, depending on the speed, are straight, wavy with amplitude 0.1-0.5 cm and wavelength 0.3-1 cm, or multibranched. The transition from one mode of fracture to another is discontinuous and hysteretic.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/123928
- DOI
- 10.1103/physreve.67.066209
- ISSN
- 1063-651X
- Article Type
- Article
- Citation
- Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, vol. 67, no. 6, 2003-06
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