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be recovered from the red residue in order to decrease the cost. Cu3(SO3)2·2H2O may be oxidized by oxygen in acidic solution to turn into copper sulfate. The influences of reaction time on leaching rates of Cu... residue was leached by H2SO4 solution under the action of air. The results show that red residue is Cu3(SO3)2?2H2O and the white powder is As2O3. The leaching rate of Cu reaches 99.00% when......
the precipitation of Zn atoms caused by the high temperature environment [19]. Thus, it is reasonable to expect that the original supersaturated solid solution can be retained in the sintered Fe-Zn..., which could also inhibit the precipitation of Zn. Thus, the Fe-Zn supersaturated solid solution was retained in the sintered parts, which was expected to regulate the degradation behavior. Figure 5......
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to the LMD and solution-treated samples, the aged samples have the highest micro-hardness, due to the precipitation strengthening. Key words: vanadium alloy; additive manufacturing; precipitates; solution..., morphology and distribution of precipitates are studied in this work. Based on the microstructure observations and the micro-hardness tests, the solution and precipitation behavior of the precipitates......
Influence of thinning on acidic deposition in Chinese fir plantationsLIU Si-mian(柳思勉)1, 2, TIAN Da-lun(田大伦)3, 4, XIANG Wen-hua(项文化)3, 4, YAN Wen-de(闫文德)4, LIU Yun-guo(刘云国)1, 2, HU Xin-jiang(胡新将)1, 2... University of Forestry and Technology, Changsha 410004, China)Abstract:Acidic deposition, which is mainly caused by atmospheric pollution, is one of the global environmental problems. Thinning is an effective......
) the fracture aperture is a function of stress corrosion, pressure solution and free-face dissolution/precipitation; 2) the fracture aperture changes with stress corrosion and pressure solution; 3) the fracture aperture changes with pressure solution and free-face dissolution/precipitation; 4) the fracture aperture is only a function of pressure solution, and the matrix porosity is also a function......
states of alloy were prepared by applying different heat treatment processes: as-cast, in-complete solid solution, complete solid solution, micro-precipitation, continuous precipitation and continuous..., in-complete solid solution; S2, complete solid solution; I, microprecipitation; A1, continuous precipitation and A2, continuous-discontinuous precipitation. 3.2 Examination of IF behavior Fig.3 shows......
Precipitation mechanism and microstructural evolution of Al2O3/ZrO2(CeO2) solid solution powders consolidated by spark plasma sinteringWanjun Yu,Yongting Zheng,Yongdong YuNational Key Laboratory.... The precipitation mechanism of solid solution was investigated by systematic heat treatments. The initial temperature of the metastable phase decomposed into Al2O3 and ZrO2 is 1050℃, and it could be completely......
J. Cent. South Univ. Technol. (2007)04-0584-05 DOI: 10.1007/s11771-007-0112-2 Experimental study on preferential solution flow during dump leaching of low-grade ores YIN Sheng-hua(尹升华)1, WU Ai... solution flow during dump leaching of low-grade ores was studied. The formative mechanism of preferential solution flow was investigated through analyzing the relationship between permeability and ore......
