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Thermodynamic Study of the Cu-Cr-Zr System.

PB96170279

Publication Date	1996
Personal Author	Zeng, K.
Page Count	91
Abstract	Of the high conductivity copper alloys which are capable of retaining their high strength after exposure at high temperatures, the Cu-Cr-Zr alloys are the most promising. They can retain most effectively the strength after annealing at high temperatures without impairing their good electrical and thermal conductivities. Knowledge of the phase relations and the thermodynamic behavior of the phases in an alloy system is essential for improving the properties of the alloys and optimising the production techniques. But such knowledge has not been well established for the Cu-Cr-Zr system. In the present study, the phase diagrams of the Cu-Cr-Zr ternary and its sub-binary systems were optimised and calculated by using the CALPHAD method. An experiment was also carried out to check the reliability of the optimised thermodynamic parameters and clear up the confusion concerning the phase relationships in the Cu-rich corner of the Cu-Cr-Zr phase diagram.
Keywords	Thermodynamics Chromium alloys Thermal conductivity Electrical resistivity Mechanical properties Foreign technology Cu-Cr-Zr
Source Agency	Helsinki University of Technology
NTIS Subject Category	71N - Nonferrous Metals & Alloys
Corporate Authors	Helsinki Univ. of Technology, Espoo (Finland). Lab. of Materials Processing and Powder Metallurgy.
Document Type	Thesis
Title Note	Doctoral thesis.
NTIS Issue Number	199614

Thermodynamic Study of the Cu-Cr-Zr System.

Thermodynamic Study of the Cu-Cr-Zr System.
PB96170279

Publication Date	1996
Personal Author	Zeng, K.
Page Count	91
Abstract	Of the high conductivity copper alloys which are capable of retaining their high strength after exposure at high temperatures, the Cu-Cr-Zr alloys are the most promising. They can retain most effectively the strength after annealing at high temperatures without impairing their good electrical and thermal conductivities. Knowledge of the phase relations and the thermodynamic behavior of the phases in an alloy system is essential for improving the properties of the alloys and optimising the production techniques. But such knowledge has not been well established for the Cu-Cr-Zr system. In the present study, the phase diagrams of the Cu-Cr-Zr ternary and its sub-binary systems were optimised and calculated by using the CALPHAD method. An experiment was also carried out to check the reliability of the optimised thermodynamic parameters and clear up the confusion concerning the phase relationships in the Cu-rich corner of the Cu-Cr-Zr phase diagram.
Keywords	Thermodynamics Chromium alloys Thermal conductivity Electrical resistivity Mechanical properties Foreign technology Cu-Cr-Zr
Source Agency	Helsinki University of Technology
NTIS Subject Category	71N - Nonferrous Metals & Alloys
Corporate Authors	Helsinki Univ. of Technology, Espoo (Finland). Lab. of Materials Processing and Powder Metallurgy.
Document Type	Thesis
Title Note	Doctoral thesis.
NTIS Issue Number	199614