| 摘要 |
Glasses and other matrix phases containing asymmetrically shaped particles are converted into materials of improved mechanical strength by orienting the particles by introducing molten matrix containing the particles into an orientation zone and removing the molten matrix from the zone e.g. through at least one small orifice under conditions such that at the center of symmetry of the zone there is substantially no movement of the fluid molecules but in those regions of the zone spaced away from the centre of symmetry, there is extensional flow of the matrix molecules parallel to the direction of movement of the fluid stream(s) leaving the orientation zone whereby any asymmetrically shaped particles suspended in the flowing fluid become aligned parallel to the direction of movement of the stream(s) leaving the orientation zone.
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