A new type of P91 heat-resistant pipeline steel ingot was prepared by feeding Al twisted wire into a melt through multi-point regional micro-supply method, combined with electromagnetic stirring. The type, shape, and size inclusions in the after forging were then analyzed scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), transmission (TEM). results showed that four types...

Rapid atomic layer deposition (RALD) has been applied to prepare various nanolaminates with repeated multilayer structures. The possible reaction pathways for RALD of the Al2O3/SiO2 nanolaminate using trimethylaluminum (TMA) and tris(tert-butoxy)silanol (TBS) are investigated by using density functional theory (DFT) calculations. The introduction of a Lewis-acid catalyst, TMA, can result in the...

Growing SiO2 layer by wet-chemical oxidation of Si surfaces before growth another insulating film(s) is a used method to passivate interfaces in applications (e.g., solar cell, photodiode) at low temperatures (LT) below 450 °C. We report on potential LT ultrahigh-vacuum (UHV) treatments combined with the oxidation, investigating effects LT-UHV after and growing Al2O3 film top SiO2/Si. This modi...

A series of novel oxide catalysts, which contain three-dimensionally ordered macroporous (3DOM) and microporous structure, were firstly designed and successfully synthesized by simple method. In the as-prepared catalysts, 3DOM SiO2 is used as support and microporous K-OMS-2 oxide nanoparticles are supported on the wall of SiO2. 3DOM K-OMS-2/SiO2 oxide catalysts were firstly used in soot particl...

This paper examines the impact of hybrid nanoparticles on stagnation point flow towards a curved surface. Silica (SiO2) and alumina (Al2O3) are added into water to form SiO2-Al2O3/water nanofluid. Both buoyancy-opposing -assisting flows considered. The governing partial differential equations reduced set ordinary equations, before being coded in MATLAB software obtain numerical solutions. Findi...

The CaO-SiO2-MgO-Al2O3 slags with high alumina content are widely applied in various pyrometallurgical processes. However, for super-high-alumina slags, especially those of more than 25 wt%, there is a lack relevant studies about the properties slag. melting behavior, viscosity, structural property, and crystallization behavior high-alumina slag fixed MgO 11.13 wt% Al2O3 from 27.61 to 40 were i...

The effects of dephosphorization agents (SiO2, Na2CO3 and Al2O3) reduction time on phosphorus gasification during pre-reduction sintering were studied. results indicate that the rate apatite by carbothermal is 23%, adding SiO2 Al2O3 25%, optimal 36% Na2CO3. increased from 13% to 31% with 20 min 60 min. Thermodynamic analysis shows promotion effect stronger than Al2O3, thermodynamic conditions a...