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박제신,Wonbaek Kim,Changyoul Suh,Sangbae Kim 대한금속·재료학회 2012 METALS AND MATERIALS International Vol.18 No.2
Amorphous Zn65Ni35 alloy, the composition of which lies between β1-NiZn and γ-NiZn phases, was pre-pared by mechanical alloying for 200 hours. The alloy was heat treated at various temperatures and leached in NaOH solution in an effort to enhance the catalytic properties for hydrogen production from methanol. X-ray diffraction study revealed that the amorphous phase crystallized during the heat treat-ment to the equilibrium β1-NiZn and γ-NiZn phases. It was found that Zn65Ni35 alloy leached after heat treatment at 928 K showed the highest catalytic activity for steam reforming of methanol. It is believed that the enhanced catalytic activity of the Zn65Ni35 alloy heat treated at 928 K is due to the dispersed Ni particles on β1-ZnNi matrix which was formed during leaching of the γ-Zn21Ni5 phase.
Ti<sub>0.3</sub>Zr<sub>0.2</sub>V<sub>0.5</sub> 합금의 수소흡수 특성에 미치는 수소화물의 영향
이동진,박제신,서창열,이재천,김원백,Lee Dongjin,Park Jeshin,Suh Changyoul,Lee Jaechun,Kim Wonbaek 한국재료학회 2005 한국재료학회지 Vol.15 No.5
The hydrogen sorption properties of $Ti_{0.3}Zr_{0.2}V_{0.5}$ NEC(non-evaporable getter) alloy and its hydrides were evaluated at room temperature. The alloy and hydride powders were prepared by the Hydride-DeHydride(HDH) method. The hydrogen sorption speed of $Ti_{0.3}Zr_{0.2}V_{0.5}$ alloy was measured to increase with the amounts of hydride phase in the getter. The hydrogen sorption speeds of $Ti_{0.3}Zr_{0.2}V_{0.5},\;(Ti_{0.3}Zr_{0.2}V_{0.5})H_{1.52},\;and\;(Ti_{0.3}Zr_{0.2}V_{0.5})H_{1.94}$ were 2.22, 3.14 and 5.08 liter/sec, respectively. The unexpected enhancement of hydrogen sorption speed with the presence of the hydride phase is considered to be due to the pre-saturation of hydrogen trap sites which can retard the diffusion of hydrogen in the alloy.