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such as equilibrium time, sulfate concentration, Aliquat 336 concentration, equilibrium pH and the extraction temperature were investigated. Extraction of V(V) and Cr(III) by Aliquat 336 involved anion exchange mechanism, and the extracted species are [(VO2SO4)R4N]org at low equilibrium pH for V(V) and [R4N-Cr(OH)4]org at high equilibrium pH for Cr(III). Calculated thermodynamic parameters show......
) and γ′ (Ni3Al) precipitates. Additionally, the metastable γ″ phase can transform to the equilibrium δ phase (Ni3Nb) within the suitable temperature range [35,36]. Previous studies show that the effects... speeds of 0.3, 0.15 and 0.03 mm/s (i.e., initial strain rates of 0.01, 0.005, and 0.001 s-1). Prior to loading, the specimens were heated to the deformation temperature at the heating rate of 10 °C......
of the conventional Ni-P coatings respectively. However, after heating at 400 °C for 1 h, the hardness of both Ni-P and Ni-P-TiN specimens improves and reaches HV 653 and HV 855, respectively. Figure 7 presents......
reduction of zinc ferrite by microwave heating[J]. Transactions of Nonferrous Metals Society of China, 2013, 23(12): 3808-3815. [21] 高新勇, 金 晶, 张 号, 董 振, 曾武勇, 孟 磊, 高文静. 市政污泥与烟煤的混合热解特性实验研究[J]. 煤炭转化, 2014, 37......
in dissimilar joints. As the name implies, friction as well as stirring action form the weld through non-consumable rotating tool having specially designed shoulder and pin, leading to sound joint [3... in these elements consequently influence the heating, plastic deformation, axial load, torque and material flow of welding [1-5]. In the available literatures, most of the research works have been carried......
for heating. Due to the technique constraints, some charges are refined from RH to LF, while others from RH to IR_UT or from LF to IR_UT. After refining, a charge is taken to a continuous caster, which..., and the other is how to optimize the LR problem efficiently. Since the LD problem is non-differentiable and piecewise affine, it is commonly solved by the subgradient algorithm. However, the convergence......
and wastewater. Recently, nano transition metal oxide materials, like ZnO, CuO and NiO, have attracted intense interest, because these metal oxides are a nontoxic, green synthesis, inexpensive and non...; (7) where C0 and Ce are denoted the initial and equilibrium concentration (mg......
, GUO Y W. The effect of pre-ageing temperature and retrogression heating rate on the microstructure and properties of AA7055[J]. Mater Sci Eng A, 2013, 588: 34-42. [67] 冯 迪, 张新明, 刘胜胆. 非等温回归再时效对7055铝合金中厚板的厚向组织及性能均匀性的影响[J]. 有色金属学报, 2015, 25(11): 3000-3010. FENG Di, ZHANG Xin-ming, LIU Sheng-dan. Effect of non-isothermal retrogression and re-ageing on through-thickness homogeneity of microstructure......
a physisorption/chemisorptions analyzer (Quantachrome Nova Surface Area Analyzer). Prior to adsorption, the samples were dried and degassed by heating in a vacuum to 200 °C for 5 h. The pore volumes were......
was 1.5%. The ceramic slurry-coated PU foams were dried at 60 °C for at least 24 h in a drying oven. Then, they were heated to 600 °C with a heating rate of 0.6 °C/min for pyrolysis of the PU foam... of immersion, and then the dissolution of Zn(OH)2 consumed the OH- of the SBF solution and the pH value decreased slowly. When the reactions among all the ions got equilibrium, the pH value of the SBF......
