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PLASTIC DEFORMATION OF METALLIC MEMBRANE INDUCED BY HYDROGEN PERMEATION
Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 Correspondent: HOU Minqiang, lectuer, Tel: (010)62554276, E-mail: houmq@ Supported by National Natural Science Foundation of China (Nos.20673129 20103009 10176030 and 10145006) and Specialized Prophasic Basic Research Project (No.2002CCD01900) of Manuscript received 2006{06{27, in revised form 2006{10{17
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ABSTRACT
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nFU 6, 7, 19 R - 5t W 'Q _0 r n ?R 6.Y _$Z U ? H{H Y . ` 8 V ? R - Y H _B2r . 8 n o fcc R _Y 5#Y (h Pd :I#Y) Baranowski a Fukai _ v g&- Z n <0.75 } V = 1.7 cm /mol R 2rK.= T ` rE j M ` t &O h Y _ l~ l Ku ? P < RK (K Y CR) 5 f (f0 r CR). A / g /: @ @ b% z z*jx_ Y _7<&)|(C z = L(0*j) 0. {& ?
HOU Minqiang, ZHANG Wushou
the Ministry of Science and Technology of China
A model for hydrogen di usion across a metallic tube type membrane is established. This model is a combination of the shell mechanics, elastoplastic mechanics, theories of thermo{stresses and metal{hydrogen interactions. Elastic, plastic and residual stresses and their e ects on hydrogen distribution and transportation and material properties are discussed. It is found that the hydrogen di usion slows down in the plastic region and local thermodynamic properties of metal{hydrogen systems are modi ed. The plastic stress can be avoided by using small charging current during hydrogen charging processes. This result can be used for applications of hydrogen puri cation, isotopic separation, storage and transportation. KEY WORDS hydrogen permeation membrane, palladium alloy, self{stress, plastic stress
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1998 206: 21 19] Zhang W S, Zhang X W, Zhang Z L. Phys Rev, 2000 62B: 8884 20] Zhang W S, Zhang Z L, Zhang X W. J Alloys Compd, 2002 336: 170 21] Zhang W S, Zhang Z L, Zhang X W. J Alloys Compd, 2002 346: 171 22] Zhang W S, Hou M Q, Wang H Y, Fu Y B. Int J Hydrogen Energy, 2004 29: 1165 23] Zhang W S, Hou M Q, Wang H Y, Fu Y B. Acta Mater, 2004 52: 5805 24] Hickman R G. J Less{Common Met, 1969 19: 369 25] Baranowski B, Majchrzak S, Flanagan T B. J Phys F: Met Phys, 1971 1: 258 26] Fukai Y. The Metal{Hydrogen System Basic Bulk Properties. Berlin: Springer, 1993: Chapter 5 27] Zhang W S, Zhang Z L, Zhang X W. J Electroanal Chem, 1999 474: 130