The tetragonal ZrO_2 microcrystallites of nano-size are considered to be the original crystal nuclei. 经分析认为四方ZrO_2纳米微晶可能是体系的晶质原核。
Crystal nuclei made from Pre-hydrated OPC were blended into cement and the effect of the crystal nuclei on the early strength of cement was studied. 用普通水泥以一定方式预水化制成晶核,掺入该水泥中,研究其对水泥早期强度的影响。
There is a good matching relationship between TiAl 3 and Al, a lot of heterogeneous crystal nuclei are created, which is beneficial for the refining of aluminum alloy. 加之TiAl3与αAl之间具有良好的晶格对应关系,从而形成了大量的异质晶核,使铝合金得到细化。
Finally, free silicon reacts with nitrogen to form Si_3N_4 crystal nuclei and grow up. 生成的Si与氮气发生反应,形成Si3N4晶核,并不断长大。
Research on Crystal Nuclei of Aluminum Alloy Refined by Al Ti C Master Alloy AlTiC中间合金细化铝时结晶核心的研究
By calculation of thermodynamics, analysis of crystal structure and study of TEM and eletron probe, it is first discovered that SiO_2 can be acted as one of the heterogeneous nuclei for lamellar intergrowth eutectic ( austenite and cementite) crystallizing in modified as-cast medium manganese steel. 对变质铸态中锰钢进行热力学计算、晶体结构分析,透射电镜与电子探针研究,发现SiO2完全可以作为层片状共生共晶体(共晶两相为奥氏体与合金渗碳体)的非自发核心。
Energy calibration of CsI ( Tl) crystal detector for measuring quenching factor of recoiled nuclei induced by incident neutron beam has been done with low-energy X-ray sources such as 109 Cd and 133 Ba and the linearity of energy response of experimental system is obtained. 用低能X射线源对一套测量入射中子引起的反冲核能量QuenchingFactor的系统进行了能量刻度,得到了这套系统的能量响应关系。
In conventional process of nonmetal electroless plating, precious metals such as Pd and Ag are used as catalyst agents, and, only after the catalytic activated metal crystal nuclei are formed on nonmetal surface through sensitization and activation treatments, then electroless plating can be done. 非金属表面要进行化学镀时,传统的工艺是采用贵金属Pd、Ag等催化剂、经敏化、活化处理,在非金属表面上形成具有催化活性的金属晶核,然后才能进行化学镀。