Journal of Materials Synthesis and Processing
1573-4870
1064-7562
Cơ quản chủ quản: N/A
Phân tích ảnh hưởng
Các bài báo tiêu biểu
Mechanochemical Synthesis of Double Hydroxides
Tập 8 - Trang 251-253 - 2000
It has been demonstrated that the formation of magnesium-aluminium double hydroxides [Mg(1 − X)Al
X
(OH)2]
X+(A
n−
X/n
) • m H2O, (A–Cl−, NO−
3, SO2−
4) occurs during mechanical activation of the mixture of magnesium hydroxide (brucite) with aluminium chloride, nitrate and sulphate in high-energy planetary-type activators. The effect of activation time on the for......
Conversion of the Echinoderm Mellita eduardobarrosoi Calcite Skeleton into Porous Hydroxyapatite by Treatment with Phosphated Boiling Solutions
Tập 7 - Trang 211-219 - 1999
The influence of the boiling solution technique (a nonhydrothermal wet treatment) in the formation of hydroxyapatite (HA) from a novel source, an echinoderm known as Mellita eduardobarrosoi, whose skeleton contains calcite as an inorganic constituent, was investigated. The experimental plan explores the conversion using a batch boiling system composed of KH2PO4 + KOH aqueous solutions at initial p......
MSR Reduction of Hexachlorobenzene
Tập 8 - Trang 295-300 - 2000
This paper deals with the mechanochemical degradation of hexachlorobenzene over Li, Na, K, Mg, Ca, Ba, Ti, and W. Apart from the mixtures containing Ti and W, the other systems react in a combustive mode leading to the chlorides and the carbides of the inorganic substrates. Reaction stoichiometries and heats were experimentally determined. The activation time required to ignite the reaction decrea......
Reaction Bonding of Three-Layer Alumina-Based Composites
Tập 7 - Trang 195-203 - 1999
Three-layer alumina-based composites with Al2O3-containing mullite as the outer layer and ZrO2-containing alumina as the inner layer were fabricated by die-pressing and reaction bonding. The effects of the outer-layer compositions on the densification behavior of three-layer composites were investigated. The existence of residual stresses in the layers was verified using indentation methods. Compa......
Chemical Durability of Waste Fluorescent Glass and Shell–Derived Glass-Ceramics
Tập 10 - Trang 37-42 - 2002
In order to obtain glass-ceramics reinforced by β-wollastonite, pressed specimens prepared by powdered waste fluorescent glass and refuse shell dumped in the seashore were heat-treated at 800°C, 900°C, and 1000°C. Chemical stability of the heat-treated specimens was analyzed by weight changes and by observation of surface morphology and composition, by field-emission scanning electron microscopy a......
Mechanisms of the Combustion Synthesis of Aluminum Nitride in High Pressure Nitrogen Atmosphere (2)
Tập 7 - Trang 1-6 - 1999
Based on calculating the free energy α
r
GΦ
m
of reactions, the reaction mechanism of combustion synthesis of AlN is possibly the reactions between N2 and Al vapor and/or liquid Al. Other oxides of Al, such as Al2O, AlO, can also react with N2 to form AlN. However, the reaction between liquid Al and N2 as well as the reactions b......
Electronic Structure of Mn Acceptor Impurity Incorporated SrTiO3 Using Embedded Cluster Method
Tập 6 - Trang 323-328 - 1998
We have performed atomic-level first principle electronic structure calculations on doped grain boundaries (GB) in SrTiO3. This was motivated by the electron holography experiments, which were able to quantify the electrostatic potential and the associated space charge distribution across the Mn-doped GB in this material. The embedded cluster Discrete Variational (DV)-Xα method was used to determi......
Reaction Driven Elastic Waves in Solid Media
Tập 6 - Trang 105-113 - 1998
Chemical reactions and phase transformations couple in solid systems with the stress fields. When reaction rates become of the same order as the rate of relaxation of mechanical perturbations, the reactions can stabilize elastic waves in the system. Density varies with temperature and conversion and since the elastic waves are driven by the gradients in temperature and conversion, these source ter......
Effect of Oxygen Content on Grain Growth Kinetics of Titanium
- 2002
The grain growth kinetics of commercially pure Titanium with different contents of oxygen have been studied. The grain size parameters have been measured by means of the Image Analysis Technique for different heat treatment temperatures and times. The growth exponents and activation energies have been calculated. Finally, tensile tests on the same materials have been carried out. When the intersti......
Synthesis of Lead–Fly-Ash Composites by Squeeze Infiltration
Tập 9 - Trang 247-251 - 2001
In this work, the squeeze infiltration process is employed to synthesize a lead–fly-ash composite. Infiltration was achieved by forcing molten lead to penetrate a fly-ash preform. Among the variables investigated is the ratio of urea to birch sawdust in the induced porosity of the preform. Experimental results show that the squeeze casting technique can be successfully used in the synthesis of the......