Effect of Cerium on Microstructure and Electrochemical Performance of Ti-V-Cr-Ni Electrode Alloy

Effect of cerium on the microstructure and electrochemical performance of the Ti0.25V0.35-xCexCr0.1Ni0.3（x=0,0.005）electrode alloy was investigated by X-ray diffraction（XRD）,field emission scanning electron microscopy/energy dispersive X-ray spectrometry（FESEM-EDS）,and electrochemical impedance spectroscopy（EIS）measurements.On the basis of XRD and FESEM-EDS analysis,the alloy was mainly composed of V-based solid solution with body-centered-cubic structure and TiNi-based secondary phase.Ce did not exist in two phases,instead,it existed as Ce-rich small white particles,with irregular edges,distributed near the grain boundaries of the V-based solid solution phase.Discharge capacity,cycle stability,and high-rate discharge ability of the alloy electrode were effectively improved with the addition of Ce at 293 K.It was very surprising that the charge retention was abnormal with larger discharge capacity after standing at the open circuit for 24 h.EIS indicated that addition of Ce improved the dynamic performance,which caused the charge transfer resistance（RT）to decrease and exchange current density（I0）to increase markedly.The exchange current density of the electrochemical reaction on the alloy surface with Ce addition was about 2.07 and 3.10 times larger than that of the alloy without Ce at 303 and 343 K,respectively.The diffusion coefficient of hydrogen（D）in the bulk alloy electrode decreased with addition of Ce,but it did not decrease so much,and the apparent activation energy（△rH）was far higher than that of the AB5 type alloy.     

The Effect of Cerium Dioxide (CeO_2) in an Anti-corrosion and Self-lubricating Coating

The effect of cerium dioxide(CeO_2)as an additive on the structure and properties of a melting type coatinghas been studied by means of microhardness measurement,scanning electron microscopy and thermal analysis.The results show that cerium dioxide can modify the microstructure and tribological properties of the coating.Model LIC-23 composite coating which contains CeO_2 performs well as a self-lubricating coating inhydrochloric acid solution.     

Tribological Behavior of Lanthanum Phosphate and Zinc Dialkyldithiophosphate and Their Mixture as Additives in Lithium Grease

Tribological Behavior of Lanthanum Phosphate and Zinc Dialkyldithiophosphate and Their Mixture as Additives in Lithium Grease     

Effect of Boron and Cerium on Microstructures and Properties of Cu-Fe-P Alloy

The effects of B and Ce on the removal of inclusions, microstructures, and properties of Cu-Fe-P alloys were studied. Certain impurity elements and the microstructures, mechanical properties, and conductivity of four experimental alloys, Cu-0.22Fe-0.06P, Cu-0.22Fe-0.06P-0.05Ce, Cu-0.22Fe-0.06P-0.02B, and Cu-0.22Fe-0.06P-0.05Ce-0. 02B （ %, mass fraction）, were tested and analyzed. Results show that on one hand, B and Ce have a remarkable function of removing S, Pb, and Bi from copper alloys ; on the other hand, the recrystallization temperature of the Cu-Fe-P alloy is considerably increased by adding trace B and Ce, resulting in the combined strengthening effect of precipitation hardening and cold work hardening after cold working and aging, while the negative effect of B and Ce on conductivity is slight. Therefore, a good combination of high strength and conductivity is achieved.     

Effect of Cerium on Lithium-Aluminium Anode

ＥｆｆｅｃｔｏｆＣｅｒｉｕｍｏｎＬｉｔｈｉｕｍ－ＡｌｕｍｉｎｉｕｍＡｎｏｄｅＧｕａｎＣｏｎｇｓｈｅｎｇ（管从胜），ＤｕａｎＳｈｕｚｈｅｎ（段淑贞），ＺｈａｏＧｕａｎｇｗｅｎ（招光文）（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃａｌＣｈｅｍｉｓｔｒｙ，Ｕｎｉ...     

Effect of Cerium on Structure and Properties of Granular Bainitic Steel

ＥｆｆｅｃｔｏｆＣｅｒｉｕｍｏｎＳｔｒｕｃｔｕｒｅａｎｄＰｒｏｐｅｒｔｉｅｓｏｆＧｒａｎｕｌａｒＢａｉｎｉｔｉｃＳｔｅｅｌ￥ＷａｎｇＦｕｍｉｎｇ（王福明），ＬｉＪｉｎｈｕｉ（李景慧），ＨａｎＱｉｙｏｎｇ（韩其勇）（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃ...     

Effect of Cerium on Microstructures of Hard Alloys

Microstructures and crack extending characteristic of the YG8R,YT5R and YT14R hard alloysadding a trace cerium were studied by AEM and HVEM with a tensile holder.In the hard alloys addingcerium,the compounds of Ce_2O_3 or Ce_2O_2S could be formed,extending of stacking faults and transforma-tion from fcc Co to hcp Co were suppressed,volume fraction of fcc Co in the alloys was increased,andstrength of Co and(TiW)C phases and grain boundaries were raised.Plastic deformation in Co phase nearedges of the tensile cracks was more strong,and the tensile cracks could pass through some smaller WCgrains.     

Effect of Cerium on Morphology of Phosphide Eutectic

At present, in cast iron fine melting, lowering phosphorus concentration with no loss ofother favorable elements at the same timeseems to be a problem, which still has notbeen solved thoroughly. Therefore, looking foran appropriate nodulizer to modify the morphology of phosphide eutectic, especially inhigh strength cast iron, is necessary. On theother hand, phosphorous can also exhibit itsfaVorable effect on mechanical properties aswell as processing behaviors. For instance,gray cast iron cont…     

Effect of Impurities and Cerium on Stress Concentration Sensitivity of Al-Li Based Alloys

Ｔｈｅｒｅａｒｅａｌｗａｙｓｓｏｍｅｇｅｏｍｅｔｒｉｃａｌｄｉｓｃｏｎ ｔｉｎｕｉｔｉｅｓ ,ｓｕｃｈａｓｆａｓｔｅｎｅｒｈｏｌｅｓ ,ｆｉｌｌｅｔｓａｎｄｇｒａｖｅｓ ,ｉｎｐｒａｃｔｉｃａｌａｉｒｃｒａｆｔｃｏｎｓｔｒｕｃｔｉｏｎｃｏｍ ｐｏｎｅｎｔｓ .Ｉｎｔｈｅｖｉｅｗｏｆｍａｔｅｒｉａｌｍｅｃｈａｎｉｃｓ ,ｔｈｅｓｅｇｅｏｍｅｔｒｉｃａｌｄｉｓｃｏｎｔｉｎｕｉｔｉｅｓｃａｎｂｅｃｏｎ ｓｉｄｅｒｅｄａｓｎｏｔｃｈｅｓ .Ｓｔｒｅｓｓｃｏｎｃｅｎｔｒａｔｉｏｎｕｓｕａｌ ｌｙｏｃｃｕｒｓａｔｎｏｔｃｈ…     

Effect of Cerium on Corrosion Resistance of Bright Zinc Electrodeposit

ＥｆｆｅｃｔｏｆＣｅｒｉｕｍｏｎＣｏｒｒｏｓｉｏｎＲｅｓｉｓｔａｎｃｅｏｆＢｒｉｇｈｔＺｉｎｃＥｌｅｃｔｒｏｄｅｐｏｓｉｔＬｉＳｈｉ－Ｊｉａ（李士嘉）；ＨｅＪｉａｎ－Ｐｉｎｇ（何建平）；ＣｈｅｎＷａｎｇ－Ｈｕａ（陈网桦）；ＺｈａｎｇＹｉｎｇ（张英）（...     

Effect of Cerium on the Properties of CuPNiSn Amorphous Alloys

CuPNiSn amorphous alloys are good brazing materials at medium temperature for replacementof silver bearing brazing materials.The crystallization temperature,wettability,tensile strength of Cu-Cujoints and the microstructure of joints for three compositional series are reported.Some rare earth elementswere added in two series.It has been found that grains are refined and the tensile strengths increase as in-creasing rare earth content.The results also show that the brittle fracture turns to plastic one for the jointswith reducing amount of(Ni+Sn),and the tensile strength is increased.     

Fatigue and Fracture Mechanisms of Aluminum Lithium Alloy Containing Cerium

Ｔｈｅｒｅｈａｖｅｂｅｅｎｃｏｎｓｉｄｅｒａｂｌｅｉｎｖｅｓｔｉｇａｔｉｏｎｓｏｎｉｎｔｒｉｎｓｉｃｔｏｕｇｈｅｎｉｎｇ．Ｔｈｅａｔｅｎｔｉｏｎｈａｓｂｅｎｐａｉｄｐｒｏｇｒｅｓｉｖｅｌｙｔｏｔｈｅｍｅｃｈａｎｉｓｍｏｆｅｘｔｒｉｎｓｉｃｔｏｕｇｈｅ...     

铈对工业纯铝冲压性能和耐蚀性能的影响

研究了加铈与不加铈的工业纯铝板的冲压性能和耐蚀性能。试样经轧制退火后在室温条件下作拉力试验，取得常规条件下的屈强比 σ０．２／σｂ，加工硬化指数ｎ、板厚方向性系数γ、均匀延伸率εｂ和板平面方向性Δγ，找出铈含量对工业纯铝板冲压性能的影响。     

烧结机滑道密封脂的选择及应用

介绍了带式烧结机的工况及设备参数，分析了烧结机滑道漏风的原因，通过采用新型滑道密封润滑脂——脲基润滑脂，不仅解决了滑道润滑难题，也明显降低了烧结机的漏风率，提高了烧结机的效率，节约了能源和维护成本。     

Effect of Rare Earths on Plant under Supplementary Ultraviolet-B Radiation: Ⅰ Effect of Cerium on Growth and Photosynthesis in Rape Seedlings Exposed to Supplementary Ultraviolet-B Radiation

Effect of cerium (Ce3 ) on growth and photosynthesis in rape seedlings exposed to two levels of ultraviolet-B radiation (UV-B, 280～320 nm) was studied with hydroponics under laboratory conditions. The growth of rape seedlings exposed to two levels of UV-B irradiation (0.15 and 0.35 W*m-2/T2) was both heavily restrained. The aboveground growth indices including stem (plant) height, leaf number, leaf area, leaf fresh/dry weight and stem fresh/dry weight were obviously decreased by 13.2%～44.1% (T1) and 21.4%～49.3% (T2). Compared to CK, and except active absorption area of roots, the belowground indices main root length, root volume and fresh/dry weight by 14.1%～35.6% (T1) and 20.3%～42.6% (T2), respectively. For Ce UV-B treatments, the aboveground and belowground growth indices were decreased by 4.1%～23.6%, 5.2%～23.3% (Ce T1) and 10.8%～28.4%, 7.0%～27.8% (Ce T2), lower than those of UV-B treatments mentioned above. These results show that Ce has protective effect on plant against injury of UV-B radiation. Furthermore, the protective effect of Ce on seedlings exposed to T1 level of UV-B radiation is superior to T2 level. Chlorophyll content, net photosynthesis rate, transpiration rate, stomatal conductance and water use efficiency in UV-B treatments decrease dramatically, whereas intercellular CO2 concentration increases. Although these indices in Ce UV-B treatments decrease compared with those of CK, the decrease in Ce UV-B treatments are lower than those in UV-B treatment. This phenomenon indicates that the ecophysiological protective effect of Ce is based on improving photosynthesis in plants. The dynamic curves of photosynthesis indices show that the course of light-repair is shortened and the injury to rape seedlings by UV-B radiation stress is alleviated by Ce.     

硫酸高铈对电解铜箔性能的影响

选用硫酸高铈为添加剂,运用电化学工作站、扫描电子显微镜（SEM）等手段探究了其在电解铜箔过程中的作用机理及其最佳添加量。研究表明,1 g/L的硫酸高铈添加量为2 mL时,电解铜箔的电位负移,晶粒细化,显著提高了抗腐蚀能力,粗糙度降低了近30%,抗拉强度和伸长率分别提高了65.1%和113.2%。铈阳离子的特殊电子结构,使其在电解铜箔生产过程中能够发挥优异作用,也为新型添加剂的开发提供了思路。