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between an original sphere ball and the corresponding quasi-elliptical particle are given by ...; (2) where R1 and R2 are the radii of the overlapped sphere balls shown in Fig. 2(b); Rb is the radius of the original sphere ball; Se is the major-minor axis......
, supplied by Vale, Japan) were mixed by cylindrical table mixer for 6 h using zirconia balls. A 1:5 mass ratio for ball to powder was selected. To consolidate the mixed powders, spark plasma sintering......
to this plate via two ball bearings. This shaft could rotate by means of an electric motor (2.2 kW, 2840 r/min) via two pulleys and a belt. A steel hammer was attached to the shaft through a hole......
. Supervisory expert control for ball mill grinding circuits [J]. Expert Systems with Applications, 2008, 34(3): 1877–1885. [2] ZHOU Ping, DAI Wei, CHAI Tian-you. Multivariable disturbance observer based......
were investigated by ball-on-disk tribometer. An increase in nitrogen pressure during coating deposition results in phase transformation according to the relation Cr2N → Cr2N + CrN → CrN... was determined using the ball-on-disk device under the following conditions: counterbody of Al2O3 ball (a hardness of 15 GPa, a diameter of 10 mm and Ra of ~0.03 μm), load of 20 N, sliding speed about 0.2 m/s......
-acidophilic bioleaching of chalcopyrite containing ball mill spillage and removal of the surface passivation layer [J]. Bioresource Technology, 2013, 130: 332-338. [10] HU Y H, QIU G Z, WANG J, WANG D Z......
process, in an attempt to induce grain refinement on the top surface layer of the sample. First, the stainless steel ball with a diameter of 0.20 mm was taken as the projectile, and the gas pressure......
. The roller bearing working frequency is 12 kHz. Normal (NR), ball fault (BF), inner race fault (IRF), and outer race fault (ORF), these four types of fault under different fault diameters of 0.1778 mm (1hp......
by the impact of a small ball at one end of the sample, and the signal was recorded using a commercial microphone, a system of amplification and a digital oscilloscope. 3 Results and discussion......
mortars [J]. Cement and Concrete Research, 2004, 34(12): 2191-2201. DOI: 10.1016/j.cemconres.2004.02.005. [41] EL-TURKI A, BALL R J, ALLEN G C. The influence of relative humidity on structural......
