Keywords: Grain size
; Strength properties of rocks; Hoek and Brown constants.
The grain size
of the pallets was found to increase as a function of sintering temperature for the samples whereas grain size
has decreased as a function of La doping.
When the austenitization temperature and the effect of suppressing the growth of austenite grains are also added, it is presumed that the grain size
becomes finer .
The sintered ZnO ceramics synthesized using the CIP method showed a significant difference in the grain size
at the center and the outer regions irrespective of the direction of the cross section.
Different grain size
mixtures are randomly distributed within the coal roof, wall, and pillar of a coal seam in the western China mining area where the overlying rock structures for most of the main coal seams are typically at shallow depths and are overlaid by thick sand layers and underlaid by thin bedrock, which poses substantial safety issues for mining operations.
We extracted 2141 sediment samples of grain size
from the borehole based on a 2 cm interval.
The results from examination of grain size
, microstructure and inclusion analysis indicate that the loss in properties was predominately caused by the accumulation of oxides.
For example, in nc-Cu [12,13], nc-Fe , andnc-Ni , a significant decrease of elastic moduli with decreasing grain size
The selected area is a fine plain stream segment of the lower reaches of the Golmud River where the difference in grain size
is very small.
While the effect of grain size
reduction on the strength of metallic materials has been well established, its effect on corrosion is more complicated and does not appear to be explainable using a universal law such as the Hall-Petch law of the yield stress.
Microscopic tension can be mainly determined by the flaws that consisted of grain size
of minerals and microcracks.