Search results

The corrosion resistance of electroless (EL) Ni–low B coatings, obtained using an alkaline borohydride-reduced electroless plating bath, with varying concentrations of NaBH4 in 3-5%NaCl, was evaluated.
The rate of deposition, boron content and the size of the nodules of the EL Ni–low B coatings were increased while the crystallinity of the coating was decreased with increasing concentration of NaBH4.
The change in chemical composition and decrease in crystallinity did not seem to have any influence on the corrosion resistance of the EL Ni–low B coatings of the present study, as opposed to the nodular growth with a columnar structure which had a profound effect [6].
The morphology and surface of electroplating nanoparticles based on nickel were investigated using the «semi-contact» method on a PHYWE atomic force microscope, a type of Tar probe 190 Al-G.

El-Aassar, G.
El fawal, N.
El-Deeb, H.
Shan et al (2018).

Al-Mg-Er, Al-Zn-Mg-Er and Al-Mg-Li-Zr-Er alloys have successfully developed in the same direction[5-7].The properties of Al alloys with Er depend on solution at elevated temperature, also some expecting phases formed during subsequently solidification, all related with thermodynamic properties.
From the experimental data available at the time, R.Hultgren el.at[19]found an average value for metallic systems:τ00 = 3000 ± 1000 K. with a view to a spot of rare earth element, simultaneity the melt point of Al is relative low, accordingly τ00 value in our work is confirmed as 2000K.
[22] G.Cacciamani, P.Riani, et al.
[23] A.F.NORMAN, P.B.PRANGNELL et.al.
[25] K.E.Knipling et al:Z.Metallkd.97(2006)246.

Besides, the contents of C, H, O, N, S were measured by elemental analysis instrument of Vario EL III.
Most sludge is currently landfilled or incinerated (Beauchamp et al. 2002).
Recent studies have proposed recycling pulp and paper sludge in wood-based panels (Davis et al 2003; Geng et al 2006, 2007a, 2007b; Taramian et al 2007).
Their contents of carbon, hydrogen, oxygen, nitrogen and sulfur were performed in elemental analysis instrument of Vario EL III (made in Germany) for bamboo paper sludge.

Al-Mobarak, A.
Al-Swayih , F.
Al-Rashoud, Corrosion Behavior of Ti-6Al-7Nb Alloy in Biological Solution for Dentistry Applications, Int.
El-Shenawy, T.
El-Bitar, Electrochemical Impedance Spectroscopy Study of the Corrosion Behavior of Some Niobium Bearing Stainless Steels in 3.5% NaCl.

The room-temperature tensile properties including 0.2% yield stress (YS), ultimate tensile stress (UTS) and elongation to fracture (EL) of these modified alloys and Ti-22Al27Nb were listed in Table 2.
Another explanation was suggested as that, the V is an effective element in improving the room-temperature ductility of Ti-Al and Ti2AlNb-based intermetallic alloys.
Banerjee et al: Acta Metall.
Gogia et al: Intermetallics Vol.6 (1998), p.741
Mao et al: Intermetallics Vol. 8(2000), p.659

Moreover, there existed about 6.24 wt% Al in the matrix material as shown in Fig.3 (a).
Table 1 The relative content of element at the zone A and B for 1# reamer El AN Series C norm.
[at%] C Error[%] A B A B A B O 8 K-series 13.39 2.11 43.40 11.04 2.0 0.5 W 74 M-series 68.86 79.26 19.43 36.00 2.8 3.3 C 6 K-series 4.38 4.80 18.89 33.36 0.8 0.9 Al 13 K-series 6.24 - 11.99 - 0.3 - Co 27 L-series 7.14 13.83 6.28 19.59 1.3 2.3 Fig.4 shows the results of energy spectrum analysis of 2# reamer at the zone A and B, and Table 2 shows the element content.
Table 2 The relative content of element at the zone A and B for 2# reamer El AN Series C norm.
Conclusions (1) The two reamers’ matrix materials should belong to the WC-Co cemented carbide according to chemical composition analysis. 1# reamer had some Al element in the matrix material

Wu et al. explored material removal effects for micro-deburring applications using ultrasonic cavitation [3].
The effects of ultrasonic based machining with nanocrystals on improving surface finish of 3D-printed material has been explored by Ma el at. [4].
Ye et al examined the effect of micro-jet impact by imploding cavitation bubbles using ultrasonic horn placed above [5] and at angular positions with respect to the surface [6].
Additional studies had also been made by Huang et al. examining the effect of abrasive particle concentration and hardness [8].
Based on a study carried out by Moussatov el at, the structure of the ultrasonic cavitation field is found to be cone-shaped with its tip located along the central axis of the ultrasonic horn [9].

From Fig. 2b, it can be seen that the oxides formed on the surface of aluminum substrates were mainly composed of Cu, Al and O, which has a good potential to form CuO and Al2O3.
Alloys Comp Vol. 345 (2002), p. 196 [2] A.L.
Technol Vol. 130 (2000), p. 195 [3] A.L.
Voevodin, A.L.
El-Shobaky: Appl.

Islam et al. [12] analyzed numerically mixed convection in a lid driven cavity with an isothermally heated square blockage and isothermal cold wall temperature imposed on all cavity walls.
Recently, Morshed et al. [13] studied numerically laminar mixed convection in a lid driven square cavity with two isothermally heated square internal blockages.
Al-Amiri, I.
Al-Amiri, K.
Al-Amiri, K.