镍

During static exposure of aluminum , stainless steel, Inconel, Monel, nickel, titanium, steel, copper, beryllium copper, aluminum bronze , maraging steel, and tungst , no metal exhibited corrosion penetration rates greater than 0.43 mils per year.

在铝、不锈钢、因康镍合金、蒙乃尔铜镍合金、镍、钛、钢、铜、铍铜、铝铜、马氏体钢和钨的静态暴露过程中，没有金属显示出大于0.43密耳每年的腐蚀穿透率。

In this paper, the processes of electroless Ni-P, Ni-Fe-Co-P and Ni-Co-B platingwere investigated by using graphite pieces as samples first, and then Ni-P, Ni-Fe-Co-Pand Ni-Co-B coatings were deposited onto carbon nanofibers by using the selectedelectroless processes. The composition, structure of the coatings and the properties ofthe metal-coated carbon nanofibers were also studied.

本文首先利用石墨基片研究了化学镀镍磷合金、镍铁钴磷合金和镍钴硼合金工艺，然后利用优化的化学镀工艺在纳米碳纤维表面镀覆了Ni-P、Ni-Fe-Co-P和Ni-Co-B镀层；研究了镀层的成分、结构以及镀层纳米碳纤维的性能。

A hard malleable ductile silvery element that is resistant to corrosion used in alloys occurs in pentlandite and smaltite and garnierite and millerite .

一种硬而软的银色元素，可锻造，抗腐蚀，用于合金中，见于硫镍铁矿，砷钴矿，镁镍矿，针镍矿中。

Spherical microfine nickel powder s were prepared using carbonyl nickel powder s as raw material in a RF plasma.

用羰基镍粉为原料，制备微细球形镍粉，研究了载气量和加料量对产品镍粉形貌和粒度的影响。

A similar open nickel foam structure has been developed by vapor depositing nickel from nickel carbonyl into a bed of urethane foam spheres, and then burning off the polymer.

一个类似的开放泡沫镍结构用羰基镍蒸发、沉淀镍到聚氨酯泡沫球上，然后烧掉聚合物。

The preparation methods of nickel-coated composite powder consisting of hydrothermal hydrogen reduction, electroless plating, decomposing of nickel carbonyl, and electroplating were summarized and its applications in thermal spraying field such as base, abradable seal, abrasion resistant, and self-lubricating coatings were introduced.

本文综述了镍包覆型复合粉末的制备方法，主要有水热氢还原法，化学镀法，羰基镍分解法和电镀法；介绍了国内外常见镍包覆型复合粉末在热喷涂领域中的应用情况、包括作为底层、封严涂层、耐磨涂层和自润滑涂层材料。

The self-lubricanting coating of nickel-coated graphite was prepared by oxygen-acetylene flame spraying technology and its friction and wear properties at room temperature were studied in a ball on disk test rig.

选用镍包石墨粉末，采用氧-乙炔火焰喷涂技术制备镍包石墨自润滑涂层，在球-盘摩擦磨损试验机上探讨了室温条件下镍包石墨自润滑涂层的摩擦磨损性能。

In order to obtain reasonable processing parameter of electroless nickel plating, the influences of the concentration of reductants NaH_2PO_2 and complex agents DL-lactic acid, stabilizers ,pH value and temperature on the deposition rate , the content of P and stability of the plating solution were studied.

在化学镀镍的工艺中，研究了次亚磷酸钠和络合剂乳酸的浓度、pH值、稳定剂和温度等工艺参数等对沉积速度和镀镍层含磷量的影响，找出了合理的化学镀镍工艺：还原剂的浓度为25 g/l~ 30g/l，络合剂乳酸的浓度为8ml/l ~ 12 ml/l，pH值的范围为4.6 ~ 4.9，选择作稳定剂，温度为85℃左右。

In this bath, maleic acid was an inhibitor, when its concentration was kept at 20 mg/L, the deposition rate could reduce to 6.17μm/h, the content of nickel decreased to 1.74% and the resistivity was 7.51μΩ·cm; Potassium ferrocyanide inhibited deposition of copper, when its content was 0.5 ppm, the deposition rate decrease to 3.38μm/h, the content of nickel was 2.03%, the resistivity can reduced to 5.41μΩ·cm, the copper deposits also had higher (111) plane orientation. Thiourea was also an inhibitor in this system, when its concentration was kept at 0.8 ppm, the deposition rate was 4.72μm/h, the content of nickel in the film was 1.20%, the resistivity can reduced to 5.46μΩ·cm, at the same time, the deposition at (111) plane orientation become more favorable.

结果表明，马来酸在该体系中是抑制剂，当其浓度为20 mg/L时，镀速降为6.17μm/h，镀层镍含量降为1.74%，表面电阻率降为7.51μΩ·cm，铜层颗粒细小均匀，更有利于在(111)面上的结晶；亚铁氰化钾的加进可以明显降低镀，当其浓度为0.5 ppm时，镀速为3.38μm/h，镀层镍含量降为2.03%，表面电阻率降为5.41μΩ·cm，铜层颗粒细小均匀，(111)晶面衍射峰增强；硫脲在体系中也显示为抑制剂，当其浓度为0.8 ppm时，镀速降到4.72μm/h，镀层镍含量为1.20%，表面电阻率降为5.46μΩ·cm，形成的铜颗粒很小，同时(111)晶面衍射峰增强，有利于铜在(111)面上结晶。

Nickel phosphide was chosen as the HDN catalyst in the present dissertation because it is reported to have the highest activity among transition metal phosphides. For the supported nickel phosphide catalysts, mesoporous MCM-41 was used as the carrier. The effect of support modification and the introduction of a secondary metal species on the activity of supported nickel phosphide catalysts were studied.

本论文以磷化镍催化剂为研究对象，考察了MCM-41负载的磷化镍催化剂的制备及其对喹啉的HDN反应性能，载体和活性组分的改性对喹啉HDN反应性能的影响，以及TiO_2的引入对非负载的磷化镍催化剂HDN反应的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。