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Hydrogen storage properties of Ti-Zr-Cr-V alloy and its improved method

已有 258 次阅读  2013-03-21 22:36   标签lululemon 

Hydrogen storage properties of Ti-Zr-Cr-V alloy and its improved method

-Re alloy tungsten alloy, but it is still refractory metal alloy. University of Applied Sciences in Germany to discuss the Mo-Re alloy manufacturing and performance of university researchers developed the Re content of 41% to 51% of the Mo-Re alloy special test ring, in 1200 to C ~~ 2000, "C temperature and in a protective atmosphere measured under stress - fracture properties and creep properties, metallography and scanning electron microscopy image analysis and discussion of the microstructure and the measured data. f Wang Gao Sun Hongzhi) Ti. Alloy hydrogen storage Zr-Cr-V-l Health and its improved method,Lululemon athletica, the people are committed to improving the ability of some alloy hydrogen storage, hydrogen storage alloy "Laves phase alloy body-centered cubic lattice solid solution than traditional The intermetallic compound can absorb more hydrogen. South Korea and Japan,lululemon canada, the researchers found that-V-based alloy, its hydrogen capacity. By Research o33cr041voo: of 736V iv and Ti020CV,lululemon outlet, (iv) three kinds of alloys and found that the good effects of the partial algebraic zirconium titanium, respectively, to add the number of 5AP / o of LOa # / o and 15at% of zirconium, resulting in the following nine kinds of alloy: sample ingredient Ti02 ~ ZroosCro47Vo ∞ Ti0 ~ Zro,Lululemon Yoga. 1oCro4n2. The Tlo1gZ] 5Cfvn20Tio = Zroo ~ Cro36371] 7ZroioCr03637 the] zZro15Crcl36V037l letter 0osCro25Vo55Tio. z'oCrn flute V,Lululemon sale. 55Tioo ~ LrojsCro25Vo55 vacuum arc melting furnace melting the alloy and cast into the button billets weight 20gog. In order to avoid segregation of the metal element, the ingot was remelted four times to 5 times, and then crushed into a powder in the air machinery, and the particle size of the powder of less than 300m into the test. LG sample powder was placed in a reactor as an activator processing method, the alcohol lamp heating evaporation 15min: Then, the pressure of 5MPa of hydrogen introduced into the reactor, and water quenching. To hydrogen absorption, the reaction is heated to evaporate 20rain. The results show that replacing part of the titanium with zirconium although reduced hysteresis and equilibrium pressure, but also increase the slope of the PC isotherms and rely on the formation of surplus Cr: phase and reducing the hydrogen storage capacity,lululemon, and thus by improving each component composition ratio to suppress the formation of cr2. Ti. 1673K of cr, Zr-Cr-V alloys such as under Zrer2 phase formation so that each Ti / Cr values ??are less than the value in the phase diagram, which is to say,. Clever. zr. Cr. v alloy composition refined to meet each zirconium content of the corresponding appropriate cr values. Controlling the composition of the alloy Ti / cT value-cr-Zr of ternary alloy Department l673K temperature liquid region of the Ti / cr values ??match. The x-ray diffraction spectra show that controlling the composition of the alloy, has a body-centered cubic crystal structure nursery lysosomal 2OO1 years of this type of alloy 6 the rare metals Express the l9 hydrazine well Dan New Material Division · paid workers Chi main phase. Adjustment Ti, Cr values ??a ZrCr2 phase formation is suppressed. Portion ZrCr2 spikes alloy solid will get single-phase alloy having a body-centered cubic structure, and is shown in the following table C. 5 and C. 6 Taijin see the relatively low speed of the dissolution of the chromium-rich. If the solution speed becomes relatively high, and that the body-centered cubic phase spikes, a deflection occurs in the alloy melt. Compared with the Group B samples PC isotherm C group like properties is essential. The PC isotherms goods that its hydrogen storage capacity in general has increased: this means. Inhibition of ZrCr ~ phase to improve the control of the hydrogen storage composition and heat treatment TI. Zr-Cr-V alloy hydrogen storage capacity and effective hydrogen storage capacity are shown in the following table: It can be seen the the heat treatment TI6z05Crn2: V057 alloy maximum hydrogen storage capacity and the effective hydrogen storage capacity were 3.55 Ⅵ% and 214 ~ / o, they are greater than the maximum hydrogen storage capacity and the effective hydrogen storage capacity of any other ABS and AB alloy. (Huang Jinchang) powder forming technology recent trends forming due to the powder in the powder metallurgy process. Commonly used uniaxial pressing at room temperature under mechanical pressure junction, there are certain limits on the shape and forming density, which hinder the popularization and application in the automotive parts. Recently researchers have developed a new 2O rare metals Letters 6, 2001 forming process. Overcome the uniaxial shaped defects. Perpendicular to the compression direction of the transverse holes in the shape of the forming member, the undercut shape, in a conventional powder uniaxially primary molding is impossible, must also for subsequent processing after sintering, recently developed a sintered
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