According to SEM analysis, preferential growth along particular crystallographic axis
improved as shown in figure 3.
2] [PHI]) is the average value of the cosine squared of the angle ([PHI]) between the film machine direction and a crystallographic axis
Quite accurately this observer noted that the composite stacks of crystals had grown up from matrix along the perpendicular crystallographic axis
a and collectively appeared rotated, or twisted, about that axis, the crystals' long axes c all being tilted regularly either to the right or the left.
If two components are equal to zero, the elongation leads in the direction of only one crystallographic axis
For the case of complete parallel alignment of crystallographic axis
with the fiber, [[phi].
where j is a crystallographic axis
(j = a, b or c).
i,j] was the mean square cosine of j pseudo-orthorhombic crystallographic axis
with respect to i principal stretch direction.
The degree of biaxial orientation of a specified crystallographic axis
was quantified with pole figure data by calculating White and Spruiell (26) biaxial orientation factors:
j] the angle between the j crystallographic axis
and the fiber axis.