Investigation of Short-Term Strength, Creep, and Impact Toughness of Graphite at 300-3500K. Experimental Procedure and Results,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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Measurements were made on graphites of different grain sizes. The modulus of elasticity increases steadily in the temp. range 300-2000K, reaches a max. at 3100K, and then decreases sharply up to 3500K. The magnitude of the activation energy of creep was almost consistent in the temp. range 2300-2900K and indicated that the mechanism was the sliding of dislocations. The high activation energy in the temp. range 2900-3100K indicated that creep was controlled by a diffusion mechanism at these temps. The impact strength decreased in the temp. range 300-2300K and then remained almost consistent up to 3000K.
- Ceramics, Refractories and Glass