Hierarchical heterostructures of beta-iron oxyhydroxide (β-FeOOH) nanostructures on electrospun TiO2 nanofibers were synthesized by a facile hydrothermal method. This synthesis method proves to be versatile to tailoring of β-FeOOH structural design that cuts across zero-dimensional particles (TF-P), one-dimensional needles (TF-N) to two-dimensional flakes (TF-F). In addition, synthesizing such ...

The laser sintering process of multi-component powder W/Cu is simulated by ANSYS software based on the factors of radiation, convection and thermal physical parameters on temperature. The laser power and scanning velocity which are the key process parameters to affect directly in sintering molding are studied in paper. The results show that when the scanning velocity is constant, the sintering ...

The paper deals with the characteristics of synthesized glass-ceramics obtained by sintering a mixture final flotation waste (FFW) tuff at 1260?C for 7 h, followed annealing pressed samples 1080oC 36 h. experiments were done in order to find possibility valorization material (FFW). By thermal treatment mixtures T20 (20 % tuff, 80 FFW) and T40 (40 60 temperature 1260oC over period hours, is dend...

Until 2000 almost all research in the microwave sintering area was confined to non-metallic materials. However, after the first report by Penn State in 1999 on full sintering of steel powders in microwave, now in the last few years there has been increasing interest in applying microwave energy for processing of variety of metallic materials. The present study is an extension of this work and r...

In this article, we studied how surfactants can impact Pb (Zr0.53Ti0.47) O3 (PZT) nanocrystal formation to result in interesting nanohexagon and nanorod shapes of PZT crystal. The PZT nanohexagons/nanorods with typical diameters and bounding lengths within the nanometer range were synthesized by sintering the mixture of PZT crystals. After annealing at 800 1C for 3 h, PZT nanohexagons were form...

the formation of nano/ultrafine grained ferrite in low carbon steels containing different amounts of niobiumwas investigated using thermomechanical treatment which consisted of annealing of 85% cold rolled martensite with different parameters. the specimens were characterized by optical and scanning electron microscopy and vickers hardness test. a lamellar dislocation cell structure was formed ...

The microstructure evolution of Fe-17 wt. % Cr-12 wt. % Ni-2 wt. % Mo stainless steel fiber felts during the fast sintering process was investigated by the synchrotron radiation X-ray computed tomography technique. The equation of dynamics of stable inter-fiber neck growth was established for the first time based on the geometry model of sintering joints of two fibers and Kucsynski’s two-sphere...

Quantitative microstructural analysis was performed on Si3N4 materials doped with 5 wt% Y203 and 5 wt% Sc203 as sintering aids. Two different processing routes were utilized to achieve complete densification: (i) gas-pressure sintering of Si3N4-starting powders (SSN) and (ii) post-sintering of reaction-bonded Si3N4 (SRBSN). Apart from quantitative evaluation of grain diameter and aspect ratio o...

Single crystals of the superconductor YBa$usO,, have been grown from a mixture of solid phase YBa,CusO,, and liquid phase silver. Crystals with a thickness of up to 1 mm along the c axis can be obtained when the mixture is soaked at 1005 “C for more than 8 h. Silver melt enhances the peritectic partial melting of the YBa&usO,, solid phase, and induces the solution and reprecipitation process du...

The elimination of residual glass in hot-pressed Y-α-SiAlON was demonstrated by varying the nitride composition. This was readily achieved by adding excess aluminium nitride (AlN), while the addition of excess Si3N4 had little effect. The amount of excess AlN required for this purpose increased with increasing Al and O content in α-SiAlON, and was higher if α-SiAlON contained larger interstitia...