Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Characteristics of Hydrogen Storage Alloy powder Compacts Using Polymer Binders

고분자 결합제를 이용한 수소저장합금 분말 성형체의 특성

  • Kim, Chan-Jung (Department of Metallurgical Engineering, Kyung Pook National University) ;
  • Kim, Dai-Ryong (Department of Metallurgical Engineering, Kyung Pook National University)
  • 김찬중 (경북대학교 금속공학과) ;
  • 김대룡 (경북대학교 금속공학과)
  • Published : 1999.06.15
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Abstract

Various characteristics - mechanical propertis, thermal cyclic hydriding characteristics and resistance to degradation by $H_2O$, CO in hydrogen - of hydrogen storage alloy powder compacts using PTFE and silicon sealant as a polymer binder were studied. Diametral tensile strength of 10wt% PTFE and 5wt% silicon sealant added compacts showed relatively high value of $4kg/cm^2$ and $10kg/cm^2$, respectively. Compacts show a good resistance to degradation by $H_2O$ in hydrogen. But hydrogen absorption rate and capacity of compacts were decreased by CO in hydrogen with the number of cycles. Cu coated and PTFE bonded compacts showed very small decrease of capacity and a good strength even after 1000 cycles of thermal hydriding and dehydriding.

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