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% chalcopyrite concentrate, 1% (volume) EPS solution mentioned above. Fe3+ and Fe2+ ions were added in forms of Fe2(SO4)3 and FeSO4, respectively, according to Table 1 and Table 2. Flasks were placed...-ray diffractometry (XRD). 3 Results and discussion 3.1 Influence of initial amount of total iron ions on chalcopyrite bioleaching The velocity of bioleaching copper is the quotient of the change......
of Tennessee, Knoxville, TN 37996-2200, USA; 2. Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China; 3. Powder Metallurgy Research Institute, Central South... of 20 kV. The electron beam used was 2 μm in size, the electric current was 100 μA, and the working voltage was 20 kV. 3 Results and discussion In the design of the TiAl-based alloy, a small ingot......
were measured by current transmitters (of ±0.2% accuracy) and voltage transmitters (of ±1.5% accuracy) to evaluate the power inputs. Four air velocity sensors (of ±3% accuracy) were fixed evenly... and the indoor and outdoor fans. 3 Results and discussion Under the exactly same experimental conditions, the defrosting performances when using the NRCD method are different from those when using the SRCD......
type digital micro-hardness tester with a load of 0.098 N and a holding time of 20 s. 3 Results and analyses 3.1 Wear rate The wear rates of AM60B alloy as a function of the load at 25, 100 and 200... reduced with increasing the load. The morphologies of the worn surfaces of AM60B alloy under different ambient temperatures and loads are shown in Fig. 3. Under the lower loads, many deep grooves along......
microstructures obtained at twisting strength of 18.0 (°)/cm, heating-cooling frequency of 40 μm-1 and different axial ratios: (a) 1:1; (b) 1.4:1; (c) 1.8:1; (d) 2:1 图3 长短轴比为1.8:1,熔凝频率为40 μm-1及不同旋扭强度下获得的半固态微观组织 Fig. 3 Semi-solid microstructures obtained at axial ratio of 1.8:1, heating-cooling frequency of 40 μm-1 and different twisting strengths: (a) 4.5 (°)/cm; (b) 9.0 (°)/cm; (c) 13.5......
tensile were analyzed by scanning electron microscopy (SEM, Philip-505). 3 Results 3.1 Microstructures Figure 1 shows the microstructure of the as-cast WNG421 alloy. As seen from Fig. 1... the mechanical properties of the studied alloy. The microstructural evolution with solution temperature and time is shown in Fig. 3. At 500 ℃ for 6 h, the morphology of the Mg24Y5 phase became thin......
polisher in a solution of ethanol with 1% perchloric acid at -30 ℃, followed by ion beam thinning on a Gatan precision ion polisher for about 0.5 h with an incidence angle of 5°. 3 Results... images, as shown in Fig. 3. From Fig. 3(a), the typical characterization of a lamellar morphology is observed, which is constituted of intermetallic compound and eutectic α-Mg. The incident electron......
). 3 Results and discussion The room-temperature XRD patterns recorded for the pure Li2MgTi3O8 ceramic sintered at 1025 °C for 4 h are shown in Fig. 1. All the diffraction peaks of the ceramic sample.... The microwave dielectric properties of Li2MgTi3O8 ceramics are shown in Fig. 3. The relative permittivity versus sintering temperature for Li2MgTi3O8 ceramics has a trend similar to that of the density......
]. Hydrometallurgy, 2010, 100(3): 168-171. [42] PROVAZI K, CAMPOS B A, ESPINOSA D C R, J A S. Metal separation from mixed types of batteries using selective precipitation and liquid-liquid extraction......
particle size analyzer (Malvern 2000, measurement range: 0.01- 1000 μm). 3 Results and discussion 3.1 Effect of different types of surfactants To find the influence of different types of surfactants... varying from 10 mg/g to 200 mg/g. Fig. 3 XRD patterns of Ni powders prepared with different dosages of PEG-600 Fig. 4 SEM images of samples prepared with different dosages of PEG-600 3.2.1 Effect......
