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and Technology Oran Mohammed Boudiaf (USTO M.B)摘 要:CeO2 nanoparticles(NPs) were synthesized in alkaline medium via the homogeneous precipitation method......
in the remaining sludge.During the coagulation process,the effects of pH and NaAlO2 concentration on REE precipitation were investigated.Fuming nitric acid(HNO3) was used to digest the pre-concentrated......
Bi precipitates in the β-Sn matrix. Solid solution strengthening and precipitation strengthening mechanisms in the β-Sn matrix increased the ultimate tensile strength and microhardness of the alloy..., improved wettability, and increased hardness, yield strength, ultimate tensile strength and shear strength of solder joints because of solid solution strengthening and/or precipitation strengthening......
solution or ammonia solution were used as aqueous phase. The synthesis conditions, such as emulsion composition, emulsifying style, precipitation reaction process, reaction temperature, morphology......
specimens for transmission electron microscopy (TEM, PHILIPS CM12) were cut from the base metal (BM) and the minimum-hardness location, and the electron transparent thin sections were prepared... is the intrinsic weakest location of the joints; while the tensile specimens of the underwater joint fracture at the interface between the weld nugget zone (WNZ) and TMAZ on the AS (see Fig.4(b)), suggesting......
for the precipitation of deposition phases. Key words: aluminum matrix composite; spray co-deposition; heat treatment; microstructures; mechanical properties 颗粒增强铝基复合材料具有较高的比强度和比模量,较小的热膨胀系数以及良好的高温性能和耐磨性等优... Ying-yuan. Ageing precipitation behavior of SiC particles reinforced 6066 aluminum alloy fabricated by spay atomization and co-deposition[J]. Rare Metal Material and Engineering, 2002, 31(6): 460?463......
of Cu content from 1% to 7%, the time needed for the appearance of peak hardness shortened, indicating that the addition of Cu can accelerate the kinetic of CuAl2 precipitation in the Al2O3/Al-Cu... requires vacancy clusters[10]. Therefore, the time needed for the appearance of peak hardness depends on the precipitation rate of θ" (CuAl2) phase that accounts for the peak hardness[12]. With increasing......
than that of both as-cast and aging for 48 h. Corrosion resistance of Mg alloy is controled by microstructure, composition of α-matrix. Precipitation of β phase along the grain boundaries acts..., AM60 Mg alloy is in the (α+β) region at 160 ℃. During the aging process at 160 ℃, precipitation of β phase takes place in continuous and discontinuous ways. At the initial stage, precipitation occurs......
Abstract: A recycling process including separation of electrode materials by ultrasonic treatment, acid leaching, Fe-removing, precipitation of cobalt, nickel, manganese and lithium has been applied... to be equal by adding NiSO4, CoSO4 and MnSO4 solution. Following that, the spherical Ni1/3Co1/3Mn1/3(OH)2 is prepared by controlled precipitation with NaOH solution under N2 atmosphere. The precipitation......
hydroxide (AACH) was synthesized as the precursor by the precipitation reaction of aluminum sulfate and ammonium carbonate. Then the precursor was calcined to get α-Al2O3 powder. The effect factors.... [3]王雅娟, 李春喜, 王子镐. 超声波-化学沉淀法制备超细氧化铝粒子[J]. 北京化工大学学报, 2002, 29(4): 8-11. WANG Ya-juan, LI Chun-xi, WANG Zi-hao. Preparation of alumina nanometer particles by an ultrasonic precipitation method[J......