Evidence for homolytic decomposition of ammonium nitrate at high temperature

1989 ◽  
Vol 93 (10) ◽  
pp. 4029-4033 ◽  
Author(s):  
K. R. Brower ◽  
Jimmie C. Oxley ◽  
Mohan Tewari
Keyword(s):  
High Temperature ◽  
Ammonium Nitrate ◽  
Homolytic Decomposition

High-Temperature Corrosion of Stainless Steels and Ni Alloys During Combustion of Urea–Ammonium Nitrate (UAN) Fuel

2016 ◽  
Vol 87 (1-2) ◽  
pp. 39-56 ◽  
Author(s):  
M. Starostin ◽  
A. Grinberg Dana ◽  
O. Dinner ◽  
G. E. Shter ◽  
G. S. Grader
Keyword(s):  
High Temperature ◽  
Ammonium Nitrate ◽  
Stainless Steels ◽  
High Temperature Corrosion ◽  
Ni Alloys ◽  
Urea Ammonium Nitrate

Anatase–brookite mixed phase nano TiO2 catalyzed homolytic decomposition of ammonium nitrate

2011 ◽  
Vol 192 (3) ◽  
pp. 1314-1320 ◽  
Author(s):  
Anuj A. Vargeese ◽  
Krishnamurthi Muralidharan
Keyword(s):  
Ammonium Nitrate ◽  
Mixed Phase ◽  
Nano Tio2 ◽  
Homolytic Decomposition

Embryogénèse somatique directe à partir de cultures d'anthères du Cichorium (Asteraceae)

1989 ◽  
Vol 67 (4) ◽  
pp. 970-976 ◽  
Author(s):  
Mouna Guedira ◽  
Thérèse Dubois-Tylski ◽  
Jacques Vasseur ◽  
Jean Dubois
Keyword(s):  
High Temperature ◽  
In Vitro Culture ◽  
Ammonium Nitrate ◽  
Key Words ◽  
Induction Time ◽  
Somatic Embryos ◽  
Cichorium Endivia ◽  
Anther Cultures ◽  
Adult Plants

Somatic embryoids and diploid plants have been obtained directly from anther cultures of an hybrid Cichorium intybus L. × Cichorium endivia L. maintained by micropropagation. Anthers at tetrad and microspore stages were the most reactive. Darkness and high temperature (35 °C) were necessary to obtain somatic embryo development on a medium with naphthylacetic acid (0.02 mg ∙ L−1) and 6-(dimethylallylamino)-purine (0.5 mg ∙ L−1). A combination of glutamine and ammonium nitrate was the most suitable nitrogen source. A short induction time (10 days) allowed the embryoids to grow into adult plants. Most plants from the somaclonal population derived from these embryoids showed a good phenotypic conformity, and some variants showed a large anthocyanic vein or narrow and incised leaves. Key words: somatic embryos, anthers, Cichorium, in vitro culture.

Thermal stability of ammonium nitrate in high-temperature coal seam

2017 ◽  
Vol 130 (2) ◽  
pp. 1171-1179 ◽  
Author(s):  
Zhi-Xiang Xu ◽  
Qian Wang ◽  
Xun Zhu ◽  
Xiao-Qi Fu
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Coal Seam ◽  
Ammonium Nitrate ◽  
Thermal Stability Of

scholarly journals Librational modes and the structure of ammonium nitrate in its high temperature phases

1974 ◽  
Vol 15 (8) ◽  
pp. 1355-1359 ◽  
Author(s):  
Kaj Österlund ◽  
Hal J. Rosen
Keyword(s):  
High Temperature ◽  
Ammonium Nitrate

Laser Raman study of lattice modes of high temperature tetragonal to cubic transition in ammonium nitrate

1988 ◽  
Vol 49 (11) ◽  
pp. 1303-1305 ◽  
Author(s):  
R.A. Dalterio ◽  
F.J. Owens
Keyword(s):  
High Temperature ◽  
Ammonium Nitrate ◽  
Laser Raman ◽  
Raman Study ◽  
Lattice Modes

Influence of Thermo-Mechanical Processing on the Microstructure of Beryllia Dispersed Nickel Alloys

1973 ◽  
Vol 31 ◽  
pp. 184-185
Author(s):  
M.S. Grewal ◽  
S.A. Sastri ◽  
N.J. Grant
Keyword(s):  
High Temperature ◽  
Nickel Alloys ◽  
Thermomechanical Processing ◽  
Cold Work ◽  
High Temperature Strength ◽  
Strengthening Effect ◽  
Mechanical Processing ◽  
Uniform Dispersion ◽  
Oxide Particles ◽  
Nickel Base

Currently there is a great interest in developing nickel base alloys with fine and uniform dispersion of stable oxide particles, for high temperature applications. It is well known that the high temperature strength and stability of an oxide dispersed alloy can be greatly improved by appropriate thermomechanical processing, but the mechanism of this strengthening effect is not well understood. This investigation was undertaken to study the dislocation substructures formed in beryllia dispersed nickel alloys as a function of cold work both with and without intermediate anneals. Two alloys, one Ni-lv/oBeo and other Ni-4.5Mo-30Co-2v/oBeo were investigated. The influence of the substructures produced by Thermo-Mechanical Processing (TMP) on the high temperature creep properties of these alloys was also evaluated.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

Lattice Imaging of Grain Boundaries in Ceramics

1977 ◽  
Vol 35 ◽  
pp. 114-115
Author(s):  
D. R. Clarke ◽  
G. Thomas
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Grain Boundaries ◽  
High Temperature Strength ◽  
Current Interest ◽  
Lattice Imaging ◽  
Special Significance ◽  
Structural Applications ◽  
Refractory Ceramics

Grain boundaries have long held a special significance to ceramicists. In part, this has been because it has been impossible until now to actually observe the boundaries themselves. Just as important, however, is the fact that the grain boundaries and their environs have a determing influence on both the mechanisms by which powder compaction occurs during fabrication, and on the overall mechanical properties of the material. One area where the grain boundary plays a particularly important role is in the high temperature strength of hot-pressed ceramics. This is a subject of current interest as extensive efforts are being made to develop ceramics, such as silicon nitride alloys, for high temperature structural applications. In this presentation we describe how the techniques of lattice fringe imaging have made it possible to study the grain boundaries in a number of refractory ceramics, and illustrate some of the findings.

Effect of Improved ThO2 Particle Dispersion in Nickel on High-Temperature Strength

1970 ◽  
Vol 28 ◽  
pp. 444-445
Author(s):  
E. R. Kimmel ◽  
H. L. Anthony ◽  
W. Scheithauer
Keyword(s):  
High Temperature ◽  
Metal Matrix ◽  
Oxide Particle ◽  
Oxide Phase ◽  
Dislocation Motion ◽  
Particle Dispersion ◽  
High Temperature Strength ◽  
Strengthening Effect ◽  
Oxide Particles ◽  
The Stability

The strengthening effect at high temperature produced by a dispersed oxide phase in a metal matrix is seemingly dependent on at least two major contributors: oxide particle size and spatial distribution, and stability of the worked microstructure. These two are strongly interrelated. The stability of the microstructure is produced by polygonization of the worked structure forming low angle cell boundaries which become anchored by the dispersed oxide particles. The effect of the particles on strength is therefore twofold, in that they stabilize the worked microstructure and also hinder dislocation motion during loading.

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