查询词典 ni

Effects of nickel content and mechanical alloying parameters on martensitic transformation during mechanical alloying of Fe-Ni as well as the mechanism were studied.

研究了Ni含量、机械合金化工艺参数对Fe-Ni机械合金化过程中马氏体相变的影响及其机理。

The effective concentration of added Ni causing 50% inhibition（EC50）ranged from 11 to 932mg·kg-1 in leached soils which were leached using artificial rain water, and from 7 to 2055mg·kg-1 in unleached soils for the tomato test, respectively, and the ratios of maximum to minimum of EC50 for leached soils and unleached soils were 85 and 294. Soil pH was the main factor controlling the toxicity of Ni in these soils.

在供试淋洗（使用模拟的人工雨水滤洗定量的土壤样品）和非淋洗土壤中，Ni对西红柿生物量50%抑制的毒性阈值（EC50）范围分别从11mg·kg-1到932mg·kg-1和从7mg·kg-1到2055mg·kg-1，其最大值和最小值比例分别达到了85和294倍。

The chemical corrosive wear mechanism of electroless Ni-P coating under unlubricated wear was studied by test and theory and the possibility of as an anti-chemical corrosive wear coating on drill pipe was probed into.

从实验和理论两方面研究了化学镀Ni-P合金在无润滑磨损条件下的化学腐蚀磨损机理，探讨了化学镀Ni-P合金作为钻杆耐腐蚀磨损功能性镀层的可行性。

Cu/Ni multilayers with various defined thickness of Cu and Ni layers were deposited on low carbon steel substrates by electrodepositing technique.

用电沉积法制备了Cu／Ni 金属多层膜，研究了多层膜硬度与单层膜厚度之间的关系。

In the NH_3 controlling region, the surface of Ni will be passivated rathereasily with the formation of oxide film.

在NH_3控制区Ni表面易钝化生成氧化膜，并停止溶解；在氧控制区，Ni的溶解速度为氧在液膜中的扩散所控制，可由氧传递速度方程来表达。

The process for Zn-Ni alloy electroplating in weak acid bath was investigated. The brighteners suitable for this system were developed. And the effects of bath compositions and process conditions on the composition of deposits were studied.

研究了弱酸性氯化钾－乙酸按体系电镀Zn-Ni合金工艺，开发了适于本体系的光亮剂，深入探讨了镀液组成及工艺条件对镀层组成的影响，获得全光亮Zn-Ni合金镀层的最佳工艺。

The results showed that the two kinds of Ni-P electroless deposits are both amorphous. The phosphorus content in the deposit using lactic acid as complexing agent is 10.04%, and in the deposit using citric acid as complexing agent is 11.93%. As the Na2S content increases, the polarizability increases, and the corrosion current and corrosion potential decrease while the Na2S content is between 1.0%~2.5%. The corrosion resistance of Ni-P electroless deposit using lactic acid as complexing agent is better than that of another kind.

结果表明，利用两种络合剂形成的Ni-P镀层均为非晶态，其中以乳酸为络合剂的镀层中P含量为l0.04mass%，以柠檬酸为络合剂的镀层中P含量为11.93mass%，在1.0%~2.5% Na2S多介质中，随着Na2S多含量的增加，阳极极化曲线的极化率增大，自腐蚀电位和自腐蚀电流降低。

Traditional Ni coating and brush electroplated composite coating of nano-diamond/Ni are prepared respectively on 45(superscript #) steel matrix. A comparative study of the structure and performance of the two brush electroplated composite coatings is carried out by metallographic microscope, scanning electron microscope, energy dispersive spectrometry and X-ray diffraction.

以45钢为基体，制备了普通镍镀层和nano-diamond/Ni复合刷镀层，采用扫描电镜、能谱仪、X射线衍射仪和金相显微镜等设备对比研究了两种镀层的组织形貌。

Surface aluminates a re formed on the surface of the catalysts and the presence of Ni favorites the f ormation of surface aluminates.

Ni的存在会影响表面重构过程从而影响催化剂的活性和选择性，在所研究的含Ni催化剂上，CO2加氢反应经历了生成双齿表面吸附中间物的过程。

Ni-Cr-B-Si alloy powder with adding rare earth was cladded by CO2 laser on the surface of 45 steel, then Ni-based coating which is combined in metallurgy with the matrix and has good performance was obtained.

为提高零件表面的耐磨性和耐蚀性，采用CO2激光器在45钢表面熔覆添加稀土的Ni-Cr-B-Si合金粉末，获得了与基体呈冶金结合的、性能良好的镍基涂层。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。