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Microstructures of Ti-48%Ni shape memory melt-spun ribbons

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中国有色金属学会会刊：英文版 2006年第B01期16卷 92-95页

作者：邢鸿雁 h.y.kim S.MIyAZAKI College of Mechanical Engineering Tianjin University of Science and TechnologyTianjin 300222China Institute of Materials Science University of TsukubaTsukuba 305-8573Japan

The effect of wheel speed on microstructures of Ti-48%Ni (mole fraction) melt-spun ribbons was investigated by X-ray diffractometry, scanning electron microscopy and transmission electron microscopy. When the wheel speed is 26 and 42 m/s, the as-spun ribbons are completely crystallized to the Ti-Ni B2 phase. The Ti-rich plate precipitates lying on {100} planes are observed in the as-spun ribbon fabricated with a wheel speed of 26 m/s. The spherical Ti2Ni precipitates are observed at grain boundaries in the as-spun ribbons fabricated with a wheel speed of 42 m/s. Amorphous and B2 phases coexist in the as-spun ribbon fabricated with a wheel speed of 52 m/s. The uniformity of grain size in heat treated ribbons decreases with increasing wheel speed.

关键词：形状记忆合金钛-镍薄膜显微结构快淬

Effect of Alloying Elements on Microstructure,Martensitic Transformation and Mechanical Properties of Ni-Mn Based Alloys

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Journal of Materials Science & Technology 2009年第5期25卷 649-654页

作者： K.Alvarez h.y.kim S.Miyazaki Graduate School University of TsukubaIbaraki 305-8573Japan Institute of Materials Science University of TsukubaTsukubaIbaraki 305-8573Japan

The microstructural features, shape memory behavior and mechanical properties of Ni-Mn based alloys were investigated by differential scanning calorimetry （DSC）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and thermal cycling test under various stresses. The transformation temperatures shifted toward lower temperatures when adding a third element into the Ni-Mn system. The addition of 10 at. pct Fe increased considerably the mechanical properties exhibiting still high transformation temperatures. however, it was found that in NiMn40Fe10 alloy the martensitic transformation is not thermoelastic in nature. The mechanism of this transformation and the crystallography of Ni-Mn（50-x）-Fex （x=5, 7, 10, 20 at. pct） alloys are presented.

关键词： Ni-Mn based alloys Martensitic transformation temperature L10 phase

采用CT评估胰腺癌新辅助治疗后肿瘤可切除性和治疗反应：观察者间一致性的研究

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国际医学放射学杂志 2022年第4期 492-493页

作者： h.y.kim y.J.Lee W.Chang J.Cho J.h.Park J.C.Lee 王雪莲耿广

摘要目的首先，评价基于再分期CT进行新辅助治疗后胰腺癌可切除性和治疗反应评估的观察者间一致性；其次，评估预测切缘阴性的诊断效能。方法本回顾性研究纳入

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Development of a Multi KD~* P Controller

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天文研究与技术 1999年第S1期 109-113页

作者： y.D.Park 1, U.W.Nam 1, y. J.Moon 1, h.y.kim 2 1 (Korea Astronomy Observatory, Taejon 305 348, KOREA) 2 (Department of Space Science in Kyunghee University, Seoul 449 701, KOREA)

We have developed a new multi KD *P controller which enables us to control the high voltage input and three KD *Ps power supply simultanenously for the Solar Flare Telescope (SOFT) in Bohyunsan Optical Astronomy Observatory (BOAO). The new KD *P controller permits a very short switching time as well as a stable of electric power supply, making it possible to obtain multiple frames in a single phase of high voltage. here we have used a 80C196KC microprocessor and three high voltage modules. The rising and falling time of output pulses generated from the new controller is found to be less than 10 -3 sec and the power supply stability is maintained within accuracy of less than 0 1%. The period of a single phase voltage is controlled by user in the range of 0 03sec to 3 seconds. The number of integrated image frames is also set by user up to 256 frames. The present system can be readily utilized to control a wider range of high voltage power by simply modifying software.

关键词： Development of a Multi KD P Controller