Containerless melting was employed to evaluate the influence of increasing ZrO2 additions on glass-forming ability peraluminous melts in magnesium aluminosilicate system. The saturation limit this oxide glasses along silica-cordierite join (SiO2–Mg2Al4Si5O18) is inversely proportional SiO2 content; however, a limited solubility melt-quenched silica exists (∼2 mol%). Peraluminous samples (partic...

The flexibility window in zeolites was originally identified using geometric simulation as a hypothetical property of SiO2 systems. The existence of the flexibility window in hypothetical structures may help us to identify those we might be able to synthesize in the future. We have previously found that the flexibility window in silicates is connected to phase transitions under pressure, struct...

A precipitation experiment was performed with human serum to model aluminosilicate formation in brains of patients with Alzheimer disease. Aluminum and (or) silicate ions were added to serum in a 1:2 molar ratio at pH 7.4. Precipitates formed immediately and were left for 24 h at 37 degrees C before filtration. Silicate and aluminosilicate formed precipitates with human serum proteins albumin, ...

The biaxial stress and thermal expansion of multilayer doped-aluminosilicate environmental barrier coatings were measured in-situ during cooling using microfocused high-energy X-rays in transmission. Coating stresses during cooling from 1000oC were measured for as-sprayed and thermally cycled samples. In the as-sprayed state, tensile stresses as high as 75 MPa were measured in the doped-alumino...

In this study, the crystallization behavior of melt-spun Al87Ni10La3 amorphous phase was investigated by using X-ray diffraction and non-isothermal differential thermal analysis techniques. The results demonstrated that the amorphous phase exhibited two-stage crystallization on heating, i.e., at first step the amorphous phase transforms into α-Al phase and at second step Al11La3 and Al3Ni inter...

In this research, mechanical alloying was used to produce Ti-50Al, Ti-45Al-5Cr and Ti-45Al-5W (at%) alloys. The effect of ternary addition (Cr and W) on microstructure and production efficiency of TiAl alloy were investigated. Alloying was performed in a planetary mill and the milling time varying from 5 to 70h. The structural evaluation in these powders was done by X-ray diffraction (XRD) tech...

Zeolites are microporous aluminosilicates with well-defined channels and cavities. They have been widely used as ionexchangers, molecular sieves, sorbents, and catalysts. The stability of zeolites is crucial to their applications. Many experimental and theoretical studies have been concentrated on their thermal stability. On the contrary, their behavior under external high pressures has receive...

Subduction zones generate voluminous magma and mediate global element cycling. Fluids are essential to this activity, yet their behavior is perhaps the most poorly understood aspect of the subduction process. Though many volatile components are subducted, H2O is the most abundant, is preferentially fractionated into the fluid phase, and, among terrestrial volatiles, is by far the most effective...

Abstract The paper presents the results of studies effect electromagnetic, ultrasonic and acid treatments on structure adsorption index alkaline-earth bentonite modified with nanoparticles silicon oxide aluminum. Studies have shown that contribute to an increase in capacity by 5, 10, 25%, respectively. Modification stabilized nanodispersed hydrosols amorphous (6-10.5 nm) crystalline boehmite (3...