132. Microstructural changes produced in graphite by high temperature creep
โ Scribed by W.V Green; E.G Zukas
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 111 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0008-6223
No coin nor oath required. For personal study only.
โฆ Synopsis
are considerably under-estimated.
This difficulty must be understood before defect structure calculations can be carried out adequately for graphite. The Morse potential yields a much larger anharmonic coefficient than is deduced from thermal expansion measurements.
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It is considered that one requirement (among others) for the Dubinin equation to linearise adsorption isotherms of carbons is the forces of adsorption should be essentially non-polar, Van der Waals forces. To test this assumption molecules with permanent dipoles, e.g. NH3 and H2S have been adsorbed
Creep curves for eight different graphites showed that the creep strain obeyed the well known equation E= At". Since the mechanisms controlling creep rate through stress and temperature are dependent on structure, it seems inappropriate to analyse the coefficients of this equation in detail. Activat