先进材料疑固实验室 Dendrite arm spacing Laboratory of Advanced Materials Solidification A convenient and widely used measure of the effects of solidification conditions on dendrite structure is dendrite arm spacing,i.e.,the spacing between primary,secondary,or higher- order branches. 生尘 (a) (b) FIGURE 5-14 Formation of new primary arms by branching from secondaries. 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITYDendrite arm spacing A convenient and widely used measure of the effects of solidification conditions on dendrite structure is dendrite arm spacing, i.e., the spacing between primary, secondary, or higher￾order branches