Synthesis and Low Temperature Physical Properties of Metal Substituted CoSr2YCu2Oy.

2004 ◽  
Vol 848 ◽  
Author(s):  
Masahiro Shiraki ◽  
Jun-ichi Shimoyama ◽  
Shigeru Horii ◽  
Kohji Kishio
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Carrier Concentration ◽  
Excess Oxygen ◽  
Superconducting Transition ◽  
Metal Substitution ◽  
Hole Carrier Concentration ◽  
Carrier Doping ◽  
Cation Substitutions

ABSTRACTIn the present study, hole carrier doping was attempted for CoSr2YCu2O7+δ which is a relating compound to a well known superconductor YBa2Cu3O7-δ by introduction of excess oxygen into CoO1+δ layer and cation substitutions. High valence metal substitution for cobalt and barium substitution for strontium were revealed to be able to introduce excess oxygen and generate hole carriers. Additional calcium substitution for yttrium enhanced hole carrier concentration p/Cu > 0.05 which was enough for superconductivity, however superconducting transition was not observed. This is possibly due to incorporation of cobalt in the CuO2 planes.

STUDY ON THE SUPERCONDUCTIVITY OF AMORPHOUS COMPOSITE METAL

2007 ◽  
Vol 21 (18n19) ◽  
pp. 3327-3329
Author(s):  
YINFENG WANG ◽  
ANPING LIU ◽  
FANGYU LI ◽  
GUANGHONG HE
Keyword(s):  
Critical Temperature ◽  
Low Temperature ◽  
Metallic Glass ◽  
Physical Properties ◽  
Bulk Metallic Glass ◽  
Composite Structure ◽  
Annealed Sample ◽  
Superconducting Transition ◽  
Negative Coefficient ◽  
Before And After

The amorphous composite metal studied in this paper is a kind of bulk metallic glass (BMG), which has special physical properties at low temperature. Zr -based bulk metallic glass chose as a sample, we report the results of microstructure, superconductivity and its corresponding crystallized sample. According to the results, the superconducting transition temperatures present before and after annealing, Zr -based bulk metallic glass has a negative coefficient of resistivity - temperature before annealing, and the superconducting critical temperature Tc was improved after annealing, for the amorphous Tc = 1.85K and for annealed sample Tc = 3.87K. Amorphous composite structure can help understand the physical properties at low temperature.

Observation by HVEM of the martensite transformation and the superconducting transition in Nb3Sn

1988 ◽  
Vol 46 ◽  
pp. 788-789
Author(s):  
M. A. Kirk ◽  
M. C. Baker ◽  
B. J. Kestel ◽  
H. W. Weber
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Superconducting State ◽  
Martensite Transformation ◽  
Sputter Deposition ◽  
Diffusion Reaction ◽  
Solute Diffusion ◽  
Superconducting Transition ◽  
Twin Boundaries ◽  
Martensite Structure

It is well known that a number of compound superconductors with the A15 structure undergo a martensite transformation when cooled to the superconducting state. Nb3Sn is one of those compounds that transforms, at least partially, from a cubic to tetragonal structure near 43 K. To our knowledge this transformation in Nb3Sn has not been studied by TEM. In fact, the only low temperature TEM study of an A15 material, V3Si, was performed by Goringe and Valdre over 20 years ago. They found the martensite structure in some foil areas at temperatures between 11 and 29 K, accompanied by faults that consisted of coherent twin boundaries on {110} planes. In pursuing our studies of irradiation defects in superconductors, we are the first to observe by TEM a similar martensite structure in Nb3Sn.Samples of Nb3Sn suitable for TEM studies have been produced by both a liquid solute diffusion reaction and by sputter deposition of thin films.

EVANOHM

Alloy Digest ◽  
1960 ◽  
Vol 9 (4) ◽  
Keyword(s):  
Electrical Resistivity ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Base Alloy ◽  
Nickel Base Alloy ◽  
Temperature Coefficient Of Resistance ◽  
High Electrical Resistivity ◽  
Nickel Base

Abstract EVANOHM is a nickel-base alloy having low temperature coefficient of resistance and high electrical resistivity. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on joining. Filing Code: Ni-57. Producer or source: Wilbur B. Driver Company.

ISO-ELASTIC

Alloy Digest ◽  
1957 ◽  
Vol 6 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Nickel Alloy ◽  
Modulus Of Elasticity ◽  
Heat Treating ◽  
Precision Instrument ◽  
Iron Nickel

Abstract ISO-ELASTIC is an iron-nickel alloy having low temperature coefficient of the modulus of elasticity. It is suitable for precision instrument springs. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: Fe-14. Producer or source: John Chatillon & Sons.

INVAR M93

Alloy Digest ◽  
2008 ◽  
Vol 57 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Low Temperatures ◽  
Bend Strength ◽  
Temperature Performance ◽  
Ni Content ◽  
Precision Alloys ◽  
Ni Alloy

Abstract Invar is an Fe-Ni alloy with 36% Ni content that exhibits the lowest expansion of known metals from very low temperatures up to approximately 230 deg C (445 deg F). Invar M93 is a cryogenic Invar with improved weldability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear and bend strength as well as fracture toughness and fatigue. It also includes information on low temperature performance as well as forming and joining. Filing Code: FE-143. Producer or source: Metalimphy Precision Alloys.

COPPER ALLOY No. 510

Alloy Digest ◽  
1971 ◽  
Vol 20 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Fatigue Properties ◽  
Temperature Performance ◽  
Tin Bronze

Abstract COPPER ALLOY No. 510 is a tin bronze containing about 0.25% phosphorus. It combines high strength and toughness with excellent fatigue properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-238. Producer or source: Brass mills.

BELMONT ALLOY 2505

Alloy Digest ◽  
1978 ◽  
Vol 27 (11) ◽  
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Tube Bending

Abstract BELMONT ALLOY 2505 is a bismuth-base, eutectic, low-melting alloy. It melts at 158 F and provides engineers and technicians with an easily castable material that is ready for use as soon as it freezes. Alloy 2505 can be recovered easily and recycled into new uses any number of times. Its many uses include shuttle blocks, tube bending, chucks for lens buffing and grinding, anchoring, dies, and low-temperature solder. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming, heat treating, and machining. Filing Code: Bi-9. Producer or source: Belmont Metals Inc..

CERROLOW-117 Alloy

Alloy Digest ◽  
1978 ◽  
Vol 27 (10) ◽  
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Melting Temperature ◽  
Eutectic Alloy ◽  
Heat Treating ◽  
Dental Models ◽  
Metal Products

Abstract CERROLOW-117 Alloy is a bismuth-base eutectic alloy that melts at 117 F (47 C). Its low melting temperature and controlled-shrinkage characteristics make it very useful in industry for such applications as proof casting in tool and die shops, dental models and low-temperature solder. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, forming, heat treating, and machining. Filing Code: Bi-8. Producer or source: Cerro Metal Products.

SOMERS LTA COPPER

Alloy Digest ◽  
1980 ◽  
Vol 29 (12) ◽  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Physical Properties ◽  
Copper Foil ◽  
Heat Treating ◽  
Dielectric Substrates ◽  
Printed Circuits

Abstract SOMERS LTA Copper is a wrought copper foil that can be annealed at 350 F in 15 minutes to the full-soft condition; its use simplifies the manufacture of printed circuits (LTA = Low-Temperature Annealable). LTA Copper is especially useful for foil weights up to and including one ounce per square foot (0.0014-inch thick) for laminating to high-temperature dielectric substrates. This datasheet provides information on composition, physical properties, and elasticity as well as fatigue. It also includes information on forming, heat treating, and machining. Filing Code: Cu-407. Producer or source: Olin Corporation.

EXCELSIOR

Alloy Digest ◽  
1968 ◽  
Vol 17 (3) ◽  
Keyword(s):  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Heavy Duty ◽  
Nickel Resistance ◽  
Copper Nickel ◽  
Resistance Alloy

Abstract EXCELSIOR is a copper-nickel resistance alloy recommended for low temperature resistors and heavy duty rheostats. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, and joining. Filing Code: Cu-186. Producer or source: H. K. Porter Company Inc..

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