Phase composition changes due to coherency strains in a Ni-24 at.% V alloy

1996 ◽  
Vol 35 (5) ◽  
pp. 597-601 ◽  
Author(s):  
D.-K. Na ◽  
J.B. Cohen ◽  
P.W. Voorhees
Keyword(s):  
Phase Composition ◽  
Coherency Strains ◽  
Composition Changes

Phase composition changes due to ammonium-sulphate: attack on Portland and Portland fly ash cements

1999 ◽  
Vol 13 (3) ◽  
pp. 117-127 ◽  
Author(s):  
S. Miletić ◽  
M. Ilić ◽  
S. Otović ◽  
R. Folić ◽  
Y. Ivanov
Keyword(s):  
Phase Composition ◽  
Fly Ash ◽  
Ammonium Sulphate ◽  
Sulphate Attack ◽  
Composition Changes

scholarly journals Mechanical stress induced activity and phase composition changes in sulfated zirconia catalysts

2003 ◽  
Vol 217 (2) ◽  
pp. 487-490 ◽  
Author(s):  
Barbara S. Klose ◽  
Rolf E. Jentoft ◽  
Alexander Hahn ◽  
Thorsten Ressler ◽  
Jutta Kröhnert ◽  
...  
Keyword(s):  
Phase Composition ◽  
Mechanical Stress ◽  
Sulfated Zirconia ◽  
Sulfated Zirconia Catalysts ◽  
Composition Changes

Phase and Shape Evolution of CdS Nanocrystallites under Solvothermal Conditions

2011 ◽  
Vol 688 ◽  
pp. 195-200
Author(s):  
Gang Xu ◽  
Yan Fang Zhang ◽  
Yan Gang Zhao ◽  
Qing Qing Wang ◽  
Gao Rong Han
Keyword(s):  
Phase Composition ◽  
Phase Formation ◽  
Experimental Results ◽  
Shape Evolution ◽  
Product Phase ◽  
Evolution Mechanism ◽  
Zinc Blende ◽  
Composition Changes ◽  
Solvothermal Conditions

CdS nanocrystallites with different morphologies have solvothermally prepared with ethylenediamine (en) and glycol as solvents. Solvent-dependent experiments were carried out by adjusting the ratios of en/glycol to investigate the effects of the solvents on the product phase formation and morphology. It was found that the morphology of CdS nanocrystallite develops from a rough spherical nanoparticle to a rod-, twinrod-, and tetrapod-shaped nanoparticle by increasing the ratio of en/glycol, meanwhile the phase composition changes from coexistence of tetragonal zinc blende CdS and hexagonal wurtzite CdS to pure hexagonal wurtzite CdS. Based on the experimental results, a possible shape evolution mechanism of CdS nanocrystallites is simply discussed.

scholarly journals Studies on Chemical Resistance of PET-Mortar Composites: Microstructure and Phase Composition Changes

Engineering ◽  
2013 ◽  
Vol 05 (04) ◽  
pp. 359-378 ◽  
Author(s):  
Ahmed Soufiane Benosman ◽  
Mohamed Mouli ◽  
Hamed Taibi ◽  
Mohamed Belbachir ◽  
Yassine Senhadji ◽  
...  
Keyword(s):  
Phase Composition ◽  
Chemical Resistance ◽  
Composition Changes

Morphological and phase composition changes during sintering of ultralight Al2O3TiO2 foams

2002 ◽  
Vol 17 (4) ◽  
pp. 831-837 ◽  
Author(s):  
M. Mann ◽  
G. E. Shter ◽  
G. S. Grader
Keyword(s):  
Phase Composition ◽  
Linear Shrinkage ◽  
Effective Density ◽  
Alumina Matrix ◽  
Temperature Range ◽  
Uniform Dispersion ◽  
Composition Changes

The morphological and phase composition changes during sintering of ultralight pure Al2O3 and Al2O3/TiO2 foams were investigated in the temperature range of 900–1600 °C in air. The titania (10 wt%) was incorporated during a nonhydrolytic foaming procedure to facilitate its uniform dispersion in the alumina matrix. The changes of linear shrinkage and related changes in effective density and porosity demonstrate a higher reactivity in the Al2O3/TiO2 foam. The formation of tialite phase in the Al2O3/TiO2 foams occurred below 1300 °C and remained stable during cooling under 1200 °C without stabilizers.

On the phase composition changes during high temperature oxidation of Pt-modified β-NiAl at 1150°C

2012 ◽  
Vol 29 (2) ◽  
pp. 107-115 ◽  
Author(s):  
G. Smoła ◽  
J. Jedliński ◽  
J.L. Grosseau Poussard ◽  
B. Gleeson ◽  
G. Bonnet ◽  
...  
Keyword(s):  
Phase Composition ◽  
High Temperature ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Composition Changes

Phase composition changes in quartzitic waste from grain processing in relation to firing temperature

1991 ◽  
Vol 48 (7) ◽  
pp. 307-309
Author(s):  
F. Kh. Tadzhiev ◽  
R. I. Ismatova ◽  
S. N. Abbasov ◽  
T. T. Abdikhodzhaev
Keyword(s):  
Phase Composition ◽  
Firing Temperature ◽  
Grain Processing ◽  
Composition Changes

scholarly journals Change in the phase composition of low-quality bauxites as a result of chemical activation

2021 ◽  
Author(s):  
R.A. Abdulvaliyev ◽  
◽  
A. Akcil ◽  
◽  
◽  
...  
Keyword(s):  
Phase Composition ◽  
Sodium Bicarbonate ◽  
Calcium Silicate ◽  
Chemical Activation ◽  
Fine Fraction ◽  
Silicate Phase ◽  
Activation Temperature ◽  
Mineral Structure ◽  
Composition Changes

As a result of separation of a fine fraction of gibbsite-kaolinite low-quality bauxite from the Krasnogorsky deposit, it is possible to increase its silicon module. When bauxite is chemically activated in a solution of sodium bicarbonate, the fine fraction is effectively separated from the large one and the phase composition changes – the calcium silicate phase disappears and the calcite phase is formed. With an increase in the activation temperature, the content of kaolinite and siderite decreases, the content of quartz and hematite increases. Studies have shown that at chemical activation temperatures of 120 oC, lasting more than 120 minutes and 200 oC, lasting more than 40 minutes, a dawsonite phase is formed in bauxite, which compacts the mineral structure. When determining the mode of chemical activation, it is necessary to take into account the negative possibility of the formation of dawsonite.

Sign in / Sign up

Export Citation Format

Share Document