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Xia X.G.,Kunming University of Science and Technology | Zhang Y.,Kunming University of Science and Technology | Xie Q.M.,Yunnan KIRO CH Photonics Co.
Advanced Materials Research | Year: 2014

Germanium is an anisotropic material. Cutting force varies with the change of crystallographic orientation and crystal plane in the process of turning. According to the effect of germanium crystal anisotropy in cutting force, fluctuation of theoretically calculated cutting force changing with crystallographic orientation and crystal plane and best cutting direction are presented. © (2014) Trans Tech Publications, Switzerland. Source


Wang H.,Kunming University of Science and Technology | Zhang Y.,Kunming University of Science and Technology | Xie Q.M.,Yunnan KIRO CH Photonics Co.
Advanced Materials Research | Year: 2014

Single-point diamond turning (SPDT) is a machining process making use of a monocrystal diamond tool which possesses nanometric edge sharpness, form reproducibility and wear resistance. The process is capable of producing components with micrometre to submicrometre form accuracy and surface roughness in the nanometre range. The cutting parameters that can make an effect on surface finish and form accuracy of SPDT such as spindle speed, feed rate, depth of cut and so on. © (2014) Trans Tech Publications, Switzerland. Source


Wu Z.F.,Kunming University of Science and Technology | Su Y.Y.,Kunming University of Science and Technology | Zhao Y.Q.,Kunming Institute of Physics | Zhao Y.Q.,Yunnan KIRO CH Photonics Co.
Advanced Materials Research | Year: 2014

The chloride, oxide and metallic species of heavy metal Pb were taken as the research objects in this paper, the effect of incineration temperature, incineration time, HCl gas and moisture on the volatilization of heavy metal Pb was discussed. The results indicate that the volatilization rates of chlorides, oxides and metallic species of heavy metal Pb increase with temperature increasing, the total volatilization rates are in the order of Pb>PbCl2>PbO. The effect of time on the volatilization rate of heavy metal Pb is notable before 50 minutes, and the effect of time on Pb is greater than PbCl2 and PbO. The volatilization rates of heavy metal Pb show tendency to rise with increasing HCl, the increasing degree is in the order of PbCl2>PbO>Pb. The volatilization rate of PbCl2 increases by an increase in HCl concentration, but if the time is enough (more than 80 minutes), then there is no effect of HCl concentration on PbCl2. The presence of moisture depresses the volatilization rates of chloride, oxide and metallic species of heavy metal Pb, the depressing degree is in the order of PbCl2 >Pb>PbO. © (2014) Trans Tech Publicutions, Switzerland. Source


Pei H.-Z.,Kunming University of Science and Technology | Li X.,Kunming University of Science and Technology | Huang P.,Yunnan KIRO CH Photonics Co. | Lu F.,Aerospace Research Institute of Materials And Processing Technology | And 2 more authors.
Hangkong Cailiao Xuebao/Journal of Aeronautical Materials | Year: 2014

The Ni-Co alloy electroforming layer was prepared by pulse current and DC current. The influences of pulse current and DC current on cast layer's microhardness, cobalt content, surface morphology and microstructure were obtained and analyzed by microhardness measurement device, EDS SEM and X-ray diffraction. The results show that the microhardness of casting layers are high either by pulse current or by DC, and it decreases with the increase of Dk. The microhardness of casting layer which was made by pulse current declines more slowly than that made by DC current. With the increasing of Dk, the cobalt content of nickel-cobalt alloy electroforming layer decreases, and decreases more slowly with pulse current increasing. The type of current has strong effect on cast layer's surface morphology. The cast layer crystal cell made by pulse current is uniform and seems cauliflower. The cast layer grain distribution made by DC current is uneven and blocky. Compared with direct current, pulsed current has slightly effect on the microstructure of the cast layer. Source


Cheng J.,Kunming University of Science and Technology | Zhang Z.-F.,Kunming University of Science and Technology | Zhao Y.-Q.,Kunming Institute of Physics | Zhao Y.-Q.,Yunnan KIRO CH Photonics Co. | And 2 more authors.
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2015

Abstract In order to improve the properties of the nickel - zinc battery and study the effects of the additives on performance of zinc electrode, 3 levels and 4 factors (acetylene black, Bi2O3, PbO, Ca[Zn(OH)3]2·2H2O coated by La(OH)3) that affect the zinc electrode were tested with orthogonal design experiments. The charge - discharge experiments of zinc electrode made up of only zinc oxide were done in 20% KOH solution to investigate the function of the additive. In order to better understand the discharge capability attenuation of electrode, the ratios of zinc to calcium in the worst sample and the best sample of the orthogonal design test were analyzed. The samples were characterized by charge - discharge cycling, phase structure analysis, cyclic voltammetry and X-ray diffraction. Experimental evidences indicate that the optimum ratio of electrode additive is as follows: 0.02 g acetylene black, 0.5 g Bi2O3, 0.3 g PbO and 0.2 g Ca[Zn(OH)3]2·2H2O coated with La(OH)3 in 5 g sample. © 2014 The Nonferrous Metals Society of China. Source

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