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, tensile test, optical microscopy (OM) and transmission electron microscopy (TEM). The results show that 50% cold rolling deformation prior to aging is beneficial since it promotes a more homogeneous distribution of the precipitation phase and reduces the number of precipitation phase on the grain boundaries, and thus shrinks the total volume of precipitation-free zones at grain and sub-grain......
J. Cent. South Univ. Technol. (2008) 15: 622-626 DOI: 10.1007/s11771-008-0116-6 Effect of tetracarbon additives on gibbsite precipitation from seeded sodium aluminate liquor ZENG Ji-shu(曾纪术... and tetrahydrofurane on gibbsite precipitation from caustic seeded sodium aluminate liquor were investigated. The additive was charged into supersaturated seeded sodium aluminate liquor, then the precipitation ratio......
Preparation and Characterization of Nanocrystalline CeO2 by Precipitation Method 张伟1,李明1,董相廷1,洪广言2,刘桂霞1 (1.Faculty of Applied Sciences, Changchun Institute of Optics and Fine Mechanics, Changchun... by precipitation method using ethanol as dispersive and protective reagent. XRD spectra show that the synthesized CeO2 has cubic crystalline structure of space group O5H-FM3M, when calcination temperature......
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Al3Zr and Fe-rich particles, other second phases dissolve into the matrix completely while homogenized at 470 ℃. The number density of the Al3Zr precipitation particles is larger, and the distribution of the Al3Zr precipitation particles is more homogeneous comparing the two-stage homogenization of 400 ℃/12 h + 470 ℃/12 h with that of 470 ℃/12 h. Key words: Al-Zn-Mg-Cu aluminum alloy......
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(OH)3 precipitation efficiency and induction period of bayerite were investigated. The results indicate that the neutralization curve of the artificial chromate alkali solutions shows three distinct...: chromate alkali solutions; bayerite; carbonization; crystallization; precipitation efficiency 1 Introduction Chromium compounds have attracted considerable interest because of their wide application......
Combined effect of amino and carboxyl group in α-alanine on seeded precipitation of sodium aluminate solution L? Bao-lin(吕保林), CHEN Qi-yuan(陈启元), YIN Zhou-lan(尹周澜), HU Hui-ping(胡慧萍) School... precipitation mechanism of sodium aluminate solution. α-alanine has the inhibitory effect at the initial period of reaction, but the favorable effect in subsequent reaction. The combined effect of amino......