Internal frictions of several polycrystalline copper wires of various purities deformed at liquid nitrogen temperature and at room temperature were measured as a function of temperature between -190ยฐC and + 20ยฐC at about 1 c/s. There are three relaxation peaks in this temperature region and detailed
Anomalous internal friction in linear polyethylene at low temperatures
โ Scribed by J. W. Cooper; N. G. Mccrum
- Publisher
- Springer
- Year
- 1972
- Tongue
- English
- Weight
- 289 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0022-2461
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friction peak has been found in iron at about lOOoK, and possibly in molybdenum at about 300ยฐK. These internal friction peaks occur at temperatures corresponding to the ductile to brittle transition of these materials in slow tension tests. The possible role of hydrogen in causing the 100ยฐK peak in
We measured the low temperature internal friction of a variety of hydrogenated amorphous, nanocrystalline, polycrystalline, and epitaxial silicon thin films. Most of the films studied are prepared either by hot-wire chemical-vapor deposition (HWCVD) or by plasma-enhanced chemical-vapor deposition (P