The direct measurements of the principal thermal expansion coefficients were carried out for the specimens of pyrolytic graphite at temperatures between 50 and 55O"C, using an apparatus with high sensitivity. Resolving power of the apparatus was f 100 A. The c-axis thermal expansion coefficient was
Frictional behavior of commercial graphites
โ Scribed by Mahesh C. Mangalick
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 559 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0008-6223
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โฆ Synopsis
Coefficient
of friction of commerical grades of polycrystalline graphites against deoxidized high phosphorus copper has been measured in an inert atmosphere at 10U5 mm Hg pressure. Graphites with large particles have a coefficient of friction of 0.48 at room temperature and of 0.35 at about 1000ยฐC. Finer particle sized graphites have a lower value of coefficient of friction. Graphitization at a high temperature also lowers the coefficient. The results support the roller mechanism of graphite friction.
๐ SIMILAR VOLUMES
726 CARBON 108. Irradiation of graphite in HFIR\* C. R. Kennedy (Metals and Ceramics i&&ion, Oak Ridge National Laboratory, Oak Ridge, Tennessee). Fifteen different grades of graphite have been irradiated in the High Flux Isotope Reactor to ffuences up to Z-5 X 1O22 nvt (E > 50 keV) at 715ยฐC. The di
Tensile strength and ductility were measured on commercial grade graphites with different grain sizes. Creep behavior was analysed by the following equation: E = B log t+ct. The data were measured by the umspecimen method. The samples annealed after creep gave the same creep curve at the secondary l