Cerium-Doped Yttrium Aluminum Perovskite (Yap): Properties of Commercial Crystals

1994 ◽  
Vol 348 ◽  
Author(s):  
W. Peter Trower
Keyword(s):  
Physical Properties ◽  
Energy Resolution ◽  
Comparative Evaluation ◽  
Industrial Applications ◽  
High Density ◽  
Small Laboratory ◽  
Physical Origin ◽  
Yttrium Aluminum ◽  
Commercial Sources ◽  
Processing Techniques

ABSTRACTThe journey of YAP from interesting laboratory curiosity to a material with commercial possibilities has taken two full decades. The reported YAP properties which motivated this effort are its rapid (~ 27 ns) dominant (~ 97%) decay which results in negligible afterglow; high density (~ 5.55 g/cm3); brightness (~ 50% of NaI:Tl); energy resolution (~ 6% at 455 keV); physical ruggedness; and chemical nonreactivity. Lone among its draw backs as a practical scintillator is its emission which is centered in the UV (~ 350 nm). Three firms now offer YAP crystals of sufficient size and quality that industrial applications are becoming possible.To date, the physical properties of YAP have only been published on small laboratory samples. Here we report a comprehensive and comparative evaluation of physical properties of material from all known commercial sources. Further, we speculate on the physical origin of variations among samples. Finally, we attempt to predict what can ultimately be expected from YAP as further refinements in its processing techniques are perfected.

ALUMINUM 1100

Alloy Digest ◽  
1974 ◽  
Vol 23 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Pure Aluminum ◽  
Heat Treating ◽  
Industrial Applications ◽  
Temperature Performance ◽  
Commercially Pure

Abstract ALUMINUM 1100 is commercially pure aluminum and is characterized by its excellent ability to be drawn, spun, stamped or forged. It has good weldability, excellent resistance to corrosion and many home, architectural and industrial applications. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-44. Producer or source: Various aluminum companies. Originally published October 1956, revised February 1974.

KUBOTA HK40 and HK50

Alloy Digest ◽  
2007 ◽  
Vol 56 (10) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Carbon Content ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Heat Treating ◽  
Industrial Applications ◽  
High Temperature Strength ◽  
Ni Alloys ◽  
Moderately High Temperature

Abstract Kubota alloys HK40 and HK50 are austenitic Fe-Cr-Ni alloys that have been standard heat-resistant materials for more than four decades. With moderately high temperature strength, oxidation resistance, and carburization resistance the alloys are used in a wide variety of industrial applications. HK 50 has slightly higher carbon content. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on casting, heat treating, machining, and joining. Filing Code: SS-998. Producer or source: Kubota Metal Corporation, Fahramet Division.

KENNERTIUM W-10

Alloy Digest ◽  
1962 ◽  
Vol 11 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Density ◽  
Powder Metal

Abstract Kennertium W-10 is a high density alloy recommended for radioactive shielding, balancing and damping applications. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and creep. It also includes information on forming, heat treating, machining, joining, and powder metal forms. Filing Code: W-4. Producer or source: Kennametal Inc..

SD 170/175/180/185

Alloy Digest ◽  
2005 ◽  
Vol 54 (9) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Radiation Shielding ◽  
High Density

Abstract The SD group is part of the Densalloy family of materials, which are high-density alloys used for a variety of applications, from counterbalance weights to radiation shielding. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming. Filing Code: W-28. Producer or source: Tungsten Products, An Allegheny Technologies Company.

SYLVANIA WN-103

Alloy Digest ◽  
1969 ◽  
Vol 18 (7) ◽  
Keyword(s):  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Base Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Electrical Contacts ◽  
High Density ◽  
High Current

Abstract Sylvania WN-103 is a machinable tungsten-base alloy combining high density with high strength in both compression and tension. It is recommended for counterweights, gyroscope components and high current electrical contacts. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as creep. It also includes information on forming, heat treating, machining, and joining. Filing Code: W-13. Producer or source: Sylvania Electric Products Inc..

SYLVANIA WN-102

Alloy Digest ◽  
1969 ◽  
Vol 18 (1) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Base Alloy ◽  
High Strength ◽  
Electrical Contacts ◽  
High Density

Abstract Sylvania WN-102 is a tungsten-base alloy combining high density with high strength in both compression and tension. It is recommended for radioactive shielding, counterweights, electrical contacts for high currents, gyroscopes, flywheels and governors. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on forming, machining, and joining. Filing Code: W-12. Producer or source: Sylvania Electric Products Inc..

KENNERTIUM W-2

Alloy Digest ◽  
1964 ◽  
Vol 13 (9) ◽  
Keyword(s):  
Compressive Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Radiation Shielding ◽  
High Density

Abstract Kennertium W-2 is a high density tungsten-base alloy having strength, rigidity, ductility and good machinability. It is recommended for gyro rotors, counterweights, governors, radiation shielding and similar applications. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive strength as well as creep. It also includes information on heat treating, machining, and joining. Filing Code: W-7. Producer or source: Kennametal Inc..

scholarly journals Numerical Analysis of Air Vortex Interaction with Porous Screen

Fluids ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 70
Author(s):  
Xudong An ◽  
Lin Jiang ◽  
Fatemeh Hassanipour
Keyword(s):  
Physical Properties ◽  
Vortex Ring ◽  
Numerical Study ◽  
Flow Behavior ◽  
Industrial Applications ◽  
Moving Mesh ◽  
Vortex Flows ◽  
Vortex Interaction ◽  
Piston Cylinder ◽  
Porous Screen

In many industrial applications, a permeable mesh (porous screen) is used to control the unsteady (most commonly vortex) flows. Vortex flows are known to display intriguing behavior while propagating through porous screens. This numerical study aims to investigate the effects of physical properties such as porosity, Reynolds number, inlet flow dimension, and distance to the screen on the flow behavior. The simulation model includes a piston-cylinder vortex ring generator and a permeable mesh constructed by evenly arranged rods. Two methods of user-defined function and moving mesh have been applied to model the vortex ring generation. The results show the formation, evolution, and characteristics of the vortical rings under various conditions. The results for vorticity contours and the kinetic energy dissipation indicate that the physical properties alter the flow behavior in various ways while propagating through the porous screens. The numerical model, cross-validated with the experimental results, provides a better understanding of the fluid–solid interactions of vortex flows and porous screens.

Improvement of the Properties of Polyethylene with Chlorinated Polyethylene (CPE)

2003 ◽  
Vol 11 (2) ◽  
pp. 115-122
Author(s):  
Kálmán Marossy ◽  
Pál Bárczy
Keyword(s):  
High Density Polyethylene ◽  
Industrial Applications ◽  
Mechanical Tests ◽  
High Density ◽  
Structural Units ◽  
Chlorinated Polyethylene ◽  
X Ray ◽  
Dynamic Mechanical ◽  
X Ray Scattering ◽  
Multiphase Systems

Blends of high density polyethylene (HDPE) and chlorinated polyethylene (CPE) have been tested across the whole concentration range. Polyethylene is used to modify the properties of CPE in the elastomer industry, but modification of the properties of polyethylene with CPE is still not usual. Conventional mechanical tests and dynamic mechanical tests were carried out. The blends were found to be multiphase systems of excellent technological compatibility. Between 10 and 15% by weight CPE increased the modulus of polyethylene. X-ray scattering studies showed that the blends contained structural units not present either in the polyethylene or in the CPE. The blends were melt processable and may have industrial applications, too.

scholarly journals Physical Properties of Nearby Dwarf Elliptical Galaxies

2006 ◽  
Vol 2 (S235) ◽  
pp. 69-69
Author(s):  
M. R. Seo ◽  
H. B. Ann
Keyword(s):  
Physical Properties ◽  
Stellar Populations ◽  
Elliptical Galaxies ◽  
High Density ◽  
Emission Lines ◽  
Dwarf Elliptical Galaxies ◽  
Nuclear Regions

AbstractMost dwarf elliptical galaxies except for ‘dE, N’ galaxies which are characterized by young stellar populations in the nuclear regions are located in the high density environment. The colors and spectra of ‘dE, N’ galaxies are different from other types, in the sense that they have redder colors with little emission lines. The majority of dwarf elliptical galaxies are younger than 7 Gyr with metallicity larger than [z/H]=−0.5.

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