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hydriding and microstructure nanocrystallization of ZK60 Mg alloy by reaction milling in hydrogen

Transactions of Nonferrous Metals Society of China 2009年第S2期19卷 363-367页

作者：袁媛王珩胡连喜孙宏飞房文斌 School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The hydriding of as-cast Mg-5.5%Zn-0.6%Zr(ZK60 Mg)(mass fraction)alloy was achieved by room-temperature reaction milling in hydrogen,with the mechanical energy serving as the driving force for the *** hydriding progress during milling was examined by hydrogen absorption measurement,and the microstructure change was characterized by X-ray diffraction analysis(XRD),scanning electron microscopy(SEM),and transmission electron microscopy(TEM),*** results show that,by room-temperature reaction milling in hydrogen,the as-cast ZK60 Mg alloy can be fully hydrided to form a nanocrystalline MgH_(2) single-phase *** particular,the average grain size of the MgH_(2) phase obtained by room-temperature reaction milling in hydrogen for 16.2 h is about 8-10 nm,and the average particle size of the as-milled hydrided powders is 2-3μm.

关键词： Mg alloy reaction milling hydriding microstructure nanocrystallization

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hydriding INFLUENCE OF INDIUM ON Pd-In ALLOYS

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中国有色金属学会会刊：英文版 1996年第3期6卷 63-67页

作者： Chen Yanglin(Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027) Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

ＨＹＤＲＩＤＩＮＧＩＮＦＬＵＥＮＣＥＯＦＩＮＤＩＵＭＯＮＰｄ－ＩｎＡＬＬＯＹＳ￥ＣｈｅｎＹａｎｇｌｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，ＺｈｅｊｉａｎｇＵｎｉｖｅ... 详细信息

ＨＹＤＲＩＤＩＮＧＩＮＦＬＵＥＮＣＥＯＦＩＮＤＩＵＭＯＮＰｄ－ＩｎＡＬＬＯＹＳ￥ＣｈｅｎＹａｎｇｌｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，ＺｈｅｊｉａｎｇＵｎｉｖｅｒｓｉｔｙ，Ｈａｎｇｚｈｏｕ３１０...

关键词： hydriding valence electrons lattice dilatation Fermi energy

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Effect of Preparation Methods on hydriding Properties of La1.5Mg17 Ni0.5 Composite Materials

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Journal of Rare Earths 2004年第Z2期22卷 110-113页

作者： Jiang Lijun Xiao Fang Li Qian Lin Qin Zhan Feng Chou Kouchih Lei Tingquan General Research Institute for Non-Ferrous Metal Beijing 100088China Department of Material Science and Engineering Harbin Institute of TechnologyHarbin 150001China General Research Institute for Non-Ferrous MetalBeijing 100088China Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China General Research Institute for Non-Ferrous MetalBeijing 100088China Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China Department of Material Science and EngineeringHarbin Institute of TechnologyHarbin 150001China

La1.5Mg17Ni0.5 hydrogen storage materials were prepared by hydriding combustion synthesis (HCS) and mechanical alloying (MA) method respectively. The experimental results show that the hydrogen absorption properties of La1.5Mg17Nio.5 prepared by MA are better than that by HCS. La1.5Mg17Nio.5 prepared by MA can absorb 6.73 mass% hydrogen at 523 K within 1 min, and 4.92 mass% hydrogen at 423 K. The improvement of hydriding properties of La1.5Mg17Ni0.5alloy prepared by MA can be ascribed to the formation of nano-crystalline and defects during the mechanical alloying.

关键词： hydriding combustion synthesis mechanical alloying hydrogen storage material hydriding property

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hydriding and dehydriding kinetics of melt spun nanocrystalline Mg20Ni10-xCux (x = 0-4) alloys

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Natural Science 2010年第1期2卷 18-25页

作者： Yang-Huan Zhang Dong-Liang Zhao Bao-Wei Li Hui-Ping Ren Shi-Hai Guo Xin-Lin Wang 不详

The nanocrystalline Mg2Ni-type electrode alloys with nominal compositions of Mg20Ni10-xCux (x = 0, 1, 2, 3, 4) were synthesized by melt-spinning technique. The microstructures of the alloys were characterized by XRD, SEM and HRTEM. The hydrogen absorption and desorption kinet-ics of the alloys were measured using an auto-matically controlled Sieverts apparatus. The re- sults show that all the as-spun alloys hold ty- pical nanocrystalline structure. The substitution of Cu for Ni does not change the major phase Mg2Ni but it leads to the formation of the sec-ondary phase Mg2Cu. The hydrogen absorption capacity of the alloys first increases and then decreases with rising Cu content, but the hy-drogen desorption capacity of the alloys mono- tonously grows with increasing Cu content. The melt spinning significantly improves the hydro- genation and dehydrogenation capacities and kinetics of the alloys.

关键词： Mg2Ni-Type Alloy Substituting Ni with Cu Melt Spinning hydriding and Dehydriding

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TRANSFORMATION OF Nd_(14)Fe_(73)Co_6B_7 ALLOY UNDER HYDROGEN TREATMENT

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Acta Metallurgica Sinica(English Letters) 1993年第6期6卷 379-382页

作者： LIU Jian QIU Baoqin LIU Muyi XIAO Yaofu University of Science and Technology Beijing,Beijing,China associate professor,Department of Materials,University of Science and Technology Beijing,Beijing 100083,China Univ of Science and Technology Beijing Beijing China

The phase constitution and variation of Nd_(14)Fe_(73)Co_6B_7 alloy after hydriding and subsequent dehydriding treatment at 770℃ have been investigated respectively by means of X-ray diffraction,SEM,TEM and magnetic measurement *** original coarse,as cast grain structure,is dissolved into α-Fe,Nd hydride and Fe_2B mixture with average dimension of 0.1 μm,during hydriding process,and subsequently the triphase mixture recombined into finely unique Nd_2Fe_(14)B phase with dimension of 0.3 μm by desorbing the *** was found that the Nd-rich phase distributed at the boundary of as-cast grain structure diffused into matrix Nd_2Fe_(14)B grain during *** remains during dehydriding and distribute homogeneously around some colonies composed of fine grains of Nd_2Fe_(14)B.

关键词： Nd_(14)Fe_(73)Co_6B_7 Nd-rich phase phase transformation hydriding

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ZPPR Fuel Element Thermal Stress-Strain Analysis

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World Journal of Nuclear Science and Technology 2014年第2期4卷 123-138页

作者： Charles W. Solbrig Jason Andrus Chad Pope Idaho National Laboratory Idaho Falls USA

The design temperature of high plutonium concentration ZPPR fuel plates is 600°C. Cladding integrity of the 304 L stainless steel cladding is a significant concern with this fuel since even small holes can lead to substantial fuel degradation. Since the fuel has a higher coefficient of thermal expansion than the cladding, an investigation of the stress induced in the cladding due to the differential thermal expansion of fuel and cladding up to the design temperature was conducted. Small holes in the cladding envelope would be expected to lead to the fuel hydriding and oxidizing into a powder over a long period of time. This is the same type of chemical reaction chain that exists in the degradation of the high uranium concentration ZPPR fuel. Unfortunately, the uranium fuel was designed with vents which allowed this degradation to occur. The Pu cladding is sealed so only fuel with damaged cladding would be subject to this damage. The thermal stresses that can be developed in the fuel cladding have been calculated in this paper and compared to the ultimate tensile stress of the cladding. The conclusion is drawn that thermal stresses cannot induce holes in the cladding even for the highest storage temperatures predicted in calculations (292°C). In fact, thermal stress cannot cause cladding failure as long as the fuel temperatures are below the design limit of 600°C (1112°F).

关键词： ZPPR Nuclear Fuel Fuel Failure Fuel hydriding and Oxidizing Thermal Induced Stresses and Strains Plastic Deformation

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