Study of High Temperature Crack Initiation in Single Crystal


Because of their excellent high temperature characteristics, Ni-based single-crystal alloys are used in applications where operating temperatures exceed 900ºC. The initiation of cracks under these conditions is generally associated with micro-scale porosities (typically between 10 and 20 microns). A rate-dependent crystallographic constitutive model in conjunction with a mass diffusion model has been used to study crack initiation in single crystal nickel-base superalloys ....etc

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Because of their excellent high temperature characteristics, Ni-based single-crystal alloys are used in applications where operating temperatures exceed 900ºC. The initiation of cracks under these conditions is generally associated with micro-scale porosities (typically between 10 and 20 microns). A rate-dependent crystallographic constitutive model in conjunction with a mass diffusion model has been used to study crack initiation in single crystal nickel-base superalloys, exposed to an oxidizing environment and subjected to ....etc

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HIGH TEMPERATURE SUPERCONDUCTORS
Historical Background
¢ Kamerlingh Onnes, Dutch physicist in 1911
¢ Meissner and Ochsenfeld
¢ Niobium nitride-16k, in 1941
¢ Vanadium-silicon-17.5k in 1953
¢ First commercial superconducting wire-NbTI,in 1962
¢ BCS Theory in 1957 by Bardeen, Cooper and Schrieffer
¢ Josephson Effect in1962
¢ Organic superconductors in 1964
¢ HTS in 1986 by Muller & Bednorz
¢ Yr,Ba,Cu,O compound- 90k in 1987
¢ Latest ceramic superconductor,Tc=138k, comp ....etc

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sspecial materials for high temperature applications ....etc

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A Paper Presentation
On
HIGH TEMPERATURE SUPER CONDUCTORS
At
Presented By
CH.SUDHARSHAN RAO
04H75A0404
J.VIJAY KUMAR
03H71A0457
IV / IV E.C.E
D.V.R&Dr H.S MIC COLLEGE OF TECHNOLOGY,
KANCHIKACHERLA.
Krishna district, AP .

HIGH TEMPERATURE SUPER CONDUCTORS

ABSTRACT :

A substantial fraction of electricity is lost in the form of heat through resistance associated with the traditional conductors such as copper or aluminum. More than 15% of the world's generated electricity is los ....etc

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full seminar report on COMPOSITES IN HIGH TEMPERATURE APPLICATIONS ....etc

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HIGH TEMPERATURE SUPERCONDUCTING-SENSORS

Submitted by :
E.Sai Sandeep
Y.Subba Reddy
THIRD YEAR
ELECTRONICS & COMMUNICATION ENGINEERING
SIR.C.R.REDDY COLLEGE OF ENGINEERING
ELURU “534007



ABSTRACT:

Scientific and industrial photon sensors, in contrast, peer into the electromagnetic realms beyond that of visible light-into the low frequency (long- wavelength, low energy) world of infrared and microwaves and into the high frequency regime of X-rays and gamma rays. But they hav ....etc

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Improved Controller for High Temperature Super
Conducting Magnetic Energy Storage (HTS-SMES)


M. V. Aware

D. Sutanto, Senior Member, IEEE,
School of Electrical, Computer
and Telecommunications Engineering
University of Wollongong
Wollongong, Australia


Abstract—

This paper describes a novel controller for a High
Temperature Superconducting Magnetic Energy Storage (HTSSMES)
that can ensure (a) fast return of energy to the superconducting
coil u ....etc

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SUPERCONDUCTIVITY is the ability of certain materials to conduct electric current with no resistance and extremely low losses. This ability to carry large amounts of currents can be applied to electric power devices such as motors and generators and to electricity transmission in power lines. For example, superconductors can carry as much as 100 times the electricity ordinary copper or aluminium wires of same size.Scientists had been intrigued with the concept of superconductivity since its discovery in the early 1900?s, but the extreme low tem ....etc

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SIR C R REDDY COLLEGE OF ENGINEERING, ELURU
Department of Electronics & Communications Engineering
PAPER PRESENTATION ON
HIGH TEMPERATURE SUPERCONDUCTORS


AUTHORS:
B. Deepthi
650555016
3/4 ECE
T. U. S. S. S. Asha kiranmai
650555076
3/4 ECE
SIR C. R. R. COLEEGE OF ENGINEERING


ABSTRACT:

In traditional conductors like copper or aluminium the transmission is asscoiated with the wastage of energy due to resistance drop.Typical copper wire generators ....etc

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