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surface area, and the distribution is more even than at the slab center. After 580 ℃/(4-12 h) treatment, the distribution is uneven with no precipitation at the grain boundary and inner, and the precipitation size is small and the density is high. With the increase of temperature, the precipitation distribution becomes more even with lower density and bigger size. The HV hardness is uneven......
Preparation of Al(OH)3 by ion membrane electrolysis and precipitation of sodium aluminate solution with seeds LI Yuan-gao(李元高)1, 2, CHEN Qi-yuan(陈启元)2, WANG Song-sen(王松森)2, YIN Zhou-lan(尹周澜)2...; Abstract: The preparation of Al(OH)3 by the ion exchange membrane electrolysis followed by the precipitation of sodium aluminate solution with seeds......
. 关键词:铝合金；二次Al3(Sc,Zr)粒子；Sc；析出 中图法分类号:TG146.2 文献标识码:A Precipitation behavior of Al3(Sc, Zr... ℃ for 32 h. These particles are completely coherent with the α(Al) matrix. Key words: Al3(Sc, Zr) secondary particle; Sc; precipitation ......
during homogenization. Furthermore, the Ce addition introduces changes in the precipitation process and consequently in the age-hardening behavior of the alloy. Microstructural measurements reveal that the addition of Ce promotes the precipitation of η' phase, but it also partly retards the precipitation of GP zones. The density of precipitates decreases in a certain degree and rod-like η......
GRAIN-BOUNDARY PRECIPITATION UNDER IRRADIATION IN DILUTE BINARY ALLOYS S.H.Song1,J.Liu1,R.G.Faulkner2,Z.X.Yuan1 (1.School of Materials and Metallurgy, Wuhan University of Science and Technology... of solute atoms frequently bring about grain boundary precipitation of a second phase because of its making the solubility limit of the solute surpassed at grain boundaries. Until now the kinetic......
precipitation method. The effect of reaction temperature, reaction time, Ni and Al ions concentration and reagent ratio on the physico-chemical properties and electrochemical performance of Al... and then decreases slightly. It is appropriate that the Ni and Al ions concentration and the ratio of urea to Ni and Al ions are 0.42mol/L and 0.75∶1, respectively. Key words: homogeneous precipitation method; α-Ni......
(precipitation–time–temperature)曲线进行对比,讨论不同V和N质量分数对钢筋V(C,N)析出行为的影响.研究结果表明:高V和低V质量分数抗震钢筋都在870 ℃左右的鼻温区析出动力过程加快,大变形量可缩短析出开始时间,VN(0.04 V-0.0135 N)钢筋实测与计算PTT曲线吻合,采用VFe(0.076 V-0.005 5 N)钢筋计算PTT曲线应该考虑形变储能△Gs的作用. 关键...-temperature precipitation behavior of V-N microalloyed anti-seismic rebars L Yukun, SHENG Guangmin, HUANG Zhenhua, XUE Haofei (College of Materials Science and Engineering, Chongqing University, Chongqing......
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J. Cent. South Univ. (2016) 23: 3085-3091 DOI: 10.1007/s11771-016-3373-9 Solvent extraction mechanism and precipitation stripping of bismuth (III) in hydrochloric acid medium by tributyl phosphate... solution under the optimum condition. Moreover, oxalate was explored as a precipitation stripping agent for BiCl3·xTBP (x=2 or 3) complexes, by which Bi(III) was stripped in the form of Bi2(C2O4)3......
