晶核形成

Al (OC3H7)3 was added to an excess of distilled water (Al : H2O = 1:60-100 ) under vigorous stirring. Nitric acid [HNO3] was then added to peptize the hydroxide precipitate (Al: HNO3 = 1: 0.16). The reaction vessel was then closed and maintained for 48h at 90° C to get clear boehmite sol.

水解和缩聚反应的最终产物为非晶态的一水氢氧化铝，由许多 AlOOH 相互聚合交联形成的胶核处于中心位置，其外层是紧密吸附的同种离子 Al2O22+，它们共同构成了胶粒。

After a longer bias time, it has been observed that polycrystalline diamonds formed as a result of secondary nucleation.

长时间的偏压后，会发现到多晶钻石的形成，推测可能是因为二次成核所造成的。

Two kinds of PLA spherulitic morphology were observed,which probably result from different nucleation locations, i.e.inside or at the surface.

球晶的成核位置在材料表面或是内部可能是观测到的两类PLA降解形貌的形成原因。

Through the observation via scanning electron microscope,we can discover that chips mainly have three types of micro-shapes like acicular,massive and squamose,its formation corresponds to PBX macro-fracture which caused by the nucleation and growth of crack and mainly embodied as transgranular fracture of explosive particles.

利用SEM观测发现PBX切屑主要有针状、块状和鳞片状三种细观形态，切屑的形成体现为裂纹的成核扩展导致的宏观断裂，并主要表现为炸药颗粒的穿晶断裂。

Acicular ferrite microstructure in micro-alloyed steels, which nucleates around non-metallic inclusions, especially oxide inclusions, has high strength and good toughness and possesses strong grain-refining ability by itself. The ultra-fine grained steel with excellent weldability is likely to be produced by forming in materials a great number of fine and dispersive micro-inclusions which is helpful to induce AF to nucleate around them through oxide metallurgy technology.

微合金钢针状铁素体组织强度高、韧性好，在奥氏体晶内非金属夹杂物上诱导形核，具有很强的自身细化晶粒的能力，通过氧化物冶金技术控制钢铁材料形成大量细小、弥散，具有诱导AF形核能力的有益微夹杂物，有望获得焊接性能优良的超细晶粒钢。

There is a strong interaction between DDP and the surface of nanocore, which can effectively restrain surface oxidation.

其形成是纳米微晶的生长、聚集和DDP在纳米核界面的衍生相互竞争的结果。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。