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Study on the Preparation and Performance of Zr41Ti14Cu13Ni10Be22 Amorphous Metallic Foam

Author: WangChunFang
Tutor: LiGong
School: Yanshan University
Course: Materials Science
Keywords: Bulk Amorphous Foam amorphous Vesicant Mechanical behavior Activation energy
CLC: TG139.8
Type: Master's thesis
Year: 2008
Downloads: 90
Quote: 0
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Abstract


This article by a vacuum prepared by argon arc melting furnace Zr41Ti14Cu13Ni10Be22 bulk amorphous alloys do preform , aqueous B2O3 the foaming agent , the preform is loaded into the quartz tube and encapsulates the different pressure of argon gas is mixed with a foaming agent , so at 950 ° C for 30min , then quenched, to prepare a Zr-based amorphous metal foams having a typical foam structures . X-Ray diffraction, optical microscopy , Rockwell hardness tester , Gleeble thermal simulation and DSC study analysis , and characterization of the microscopic structure and thermodynamic properties of the Zr -based amorphous foam . The results show that : the typical foam structure of the Zr-based amorphous metal foam can be obtained when the inner diameter of the quartz tube of 15mm, an argon gas pressure of 1.0 bar . X-Ray diffraction diagram , the foam amorphous no crystallization peak , maintaining the characteristics of the amorphous structure of the substrate , so as to achieve the purpose of preparing foams amorphous . Archimedes density measurement results showed that , compared to density 6.37g/cm3 Zr41Ti14Cu13Ni10Be22 bulk amorphous alloy, the amorphous density of the foam was 5.45g/cm3 , the relative density of ρ / ρs was 85.6%, the presence of stomata , porosity 14.4% . In the hardness test , foam amorphous average Rockwell hardness of 49.2, and the hardness of the alloy 53 is slightly smaller than the original amorphous . The foam can be drawn by the Kissinger equation amorphous glass transition activation and for 143.90kJ/mol, crystallization activation energy for 82.73kJ/mol and 312.20kJ/mol . 3 as the foam preform Zr41Ti14Cu13Ni10Be22 chunk of amorphous alloy crystallization peak corresponding activation energy for crystallization of 193.60kJ/mol 278.52kJ/mol , 188.66 kJ / mol . In the the Gleeble experiment , the yield strength of the foam amorphous 75MPa, is plastically deformed , less than the fracture strength of 1870MPa Zr41Ti14Cu13Ni10Be22 .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > The alloy learn with a variety of properties of alloys > Other special nature of the alloy > Amorphous alloy
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