The morphology of spherulites in nylon 69 and its formation conditions in isothermal crystallization have been studied by a polarizing microscope.

But the refinement effect of Ti-B is better then that of RE,the roundness of the globular grains obtained is better,the spheroidization velocity of the primary α-Al grains is faster.

The experimental result shows that RE can refine the globular grains of semisolid Al-alloy remarkably,improve the roundness and uniformity of globular grains.

According to the cr ys tallography condition of spheroidal crystal,it is required that the crystallite must have a large number of small angle branches which are distributing radiall y and symmetrically;besides,these small angle branches should have the feature of"regular branch"that means they have same growing babit and growing rate.

With the increase of Y the number of quasi-crystals substantially increases; in a certain range Mn accelerate the spherical quasi-crystals\' formation, while when exceeds a certain amount, conversely it inhibits the formation of quasi-crystals.

Effects of Nucleator on Crystalline Morphology and Mechanical Properties of Polypropylene;

Isothermal crystalline morphology of isotactic polypropylene (iPP) with clarifying nucleator - TM-3 was observed by polarized light microscope.

Their crystalline morphology was characterized by using polarizing light microscopy,which were contrast to HDPE/elastomer blends.

Compatibility and crystal morphology of cocoa butter substitutes and cocoa butter

In this paper, we restudy the hsianghualite morphology, based on the fact that the right and left forms appear on hsianghualite morphology,it is realized that the right and left forms can not combine each other on a single crystal morphology but can compose a twin.

In this paper,we discussed some classical and basic concepts of crystal morphology(positive and negative forms,right and left forms,general and special forms).