| Автор | D J Johnson |
| Автор | C N Tyson |
| Дата выпуска | 1970-04-01 |
| dc.description | A number of low-angle parameters have been evaluated for a high-modulus carbon fibre, the most useful is considered to be l<sub>p</sub>, Porod's `distance of heterogeneity'. When I<sup>−½</sup> is linearly related to θ<sup>2</sup>, l<sub>p</sub>=2a, where a is the correlation length obtained from the (I<sup>−½</sup>, θ<sup>2</sup>) plot. The parameter l<sub>p</sub> and the internal surface area have been evaluated for carbon fibres heat treated in the range 1000-2800°c. There is good correlation between the low-angle parameters and strength, but a marked discontinuity at about 1900°c. This discontinuity is related to a change from highly cross-linked graphite with many small pores and small crystallite size, to graphite with little crosslinking, a lower internal surface, but larger individual pores and crystallites where crystallite perfection is an important factor. High strength in stress-graphitized carbon fibres would appear to be a result of strain-induced crystallization with the removal of lattice defects. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Low-angle X-ray diffraction and physical properties of carbon fibres |
| Тип | paper |
| DOI | 10.1088/0022-3727/3/4/310 |
| Electronic ISSN | 1361-6463 |
| Print ISSN | 0022-3727 |
| Журнал | Journal of Physics D: Applied Physics |
| Том | 3 |
| Первая страница | 526 |
| Последняя страница | 534 |
| Аффилиация | D J Johnson; Textile Physics Laboratory, Department of Textile Industries, University of Leeds |
| Аффилиация | C N Tyson; Textile Physics Laboratory, Department of Textile Industries, University of Leeds |
| Выпуск | 4 |
