Because the contact resistance in spot welding of aluminum alloys is random and non continuous in distribution,and also the aluminum alloys have excellent electric and heat conduct ability,the nucleation process has the unique properties.
在铝合金的电阻点焊过程中 ,由于接触电阻具有随机性和分布不连续的特征 ,而且铝合金材料本身具有优良的导电、导热能力 ,这使得其点焊的形核过程具有独特的特点。
At the early nucleation stage the grains are spherical, after definite time the spherical grains become tabular.
单分散扁平卤化银微晶成核过程的研究＊胡勇军王荣琴彭必先＊＊（中国科学院感光化学所，北京１００１０１）关键词卤化银乳剂，成核过程，扁平颗粒多年来，卤化银乳剂微晶体制备的研究重点一直放在宏观相的结构与性能的关系上，已经发现卤化银照相乳剂的。
Understanding and Accelerating the UL Qualification Process for Lead Free Materials;
了解与加快无铅材料的UL认证审核过程