Masayuki ItagakiIsao ShitandaKunihiro Watanabe
5页查看更多>>摘要：A channel flow double electrode (CFDE) was applied to the investigation of a copper deposition in sulfuric acid solution (pH1) containing chloride ions. Cupric ions, which are emitted from the working electrode, can be detected on the collecting electrode of CFDE. The formation rate of cupric ions, nu Cu(I), and the average valence of the reduction were determined from the currents of working and collecting electrodes. Charge transfer rate constant, k, was estimated by relation of the flow rate with the current at steady state. It was found that the parameter, k, increased exponentially with the cathodic overvoltage. Furthermore, an inductive loop was observed on the Nyquist plot of the electrochemical impedance. indicating the presence of reaction intermediate. The above-mentioned results confirmed that the CFDE was useful method to investigate the electrodeposition mechanism of metals.
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NETL
NSTL
Zen MiyazakiShinji YamaneJun'ichiro Muto
3页查看更多>>摘要：CdSe and CdTe, belonging to the II-VI family, are photoactive semiconductors, and the pseudo-binary compound of CdSe_xTe_((1-x)) is able to have various properties by changing the molar fraction, x. The CdSe_xTe_((1-x)) thin films of mu m thick were fabricated onto glass substrate by vacuum deposition, and the structural, optical and electrical properties are examined. It is noted that the deposited films exhibit n-type conductivity for larger x(Se-rich films), while p-type conductivity, for smaller x(Te-rich films). Empirical equation of band gap energy on x is also discussed.
原文链接:- NETL
- NSTL
Jinbing TengKenkichi SatoSusumu Machida
5页查看更多>>摘要：A small fatigue-testing system operated by four piezo-electric actuators to be set on the stage of a laser microscope has been developed to perform in-situ observation of fatigue cracks. This paper reports the following four aspects: (1) the performance of the piezo-electric actuator and the built-in piezo sensor used In the testing system, (2) the design concept of the small fatigue-testing system as well as its structure and performance, (3) surface roughness changes in steel specimens with stress cycles at different load levels, and (4) micrographs in the fatigue crack initiation and growth processes of steel specimens. The fatigue-testing system is effectively applicable to microscopic studies on initiation and propagation mechanism of fatigue cracks.
原文链接:- NETL
- NSTL
