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Alumina Dispersion Strengthened Copper

High temperature mechanical behavior of alumina dispersion ...

Alumina dispersion strengthened copper (ADSC) alloys have attached wide attention due to their high strength and excellent creep properties at elevated temperatures. Reinforced alumina particles are finely dispersed in the copper matrix. They do not dissolve or coarsen even when the temperature is up to the melting point of copper.

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Brazing of Mo to Glidcop Dispersion Strengthened Copper ...

strengthened by a uniform dispersion of alumina particles. These particles, which are stable at high temperatures and above the melting point of the matrix, have the aim of preventing the softening and recrystallization of the copper when treated at high temperatures [1]. Glidcop exhibits an improved mechanical resistance, especially at high ...

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Recrystallization of alumina dispersion strengthened ...

1. Introduction. Alumina dispersion strengthened copper (ADSC) offers a high strength at elevated temperatures as well as at room temperature .The high temperature strength retention is mainly attributed to the presence of uniformly dispersed fine alumina particles, which are thermally stable.

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Abnormal grain growth in alumina dispersion-strengthened ...

Alumina dispersion-strengthened copper possesses high strength at elevated temperatures combined with high electrical and thermal conductivity .The reinforcing particles, which are stable up to the melting point of copper, pin the grain boundaries without significant degradation of the conductivities due to the low volume fraction , .Because of their superior properties, these composite are ...

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JPH08109422A - Production of alumina dispersion ...

PURPOSE: To produce an alumina dispersion strengthened copper capable of producing an electric wire excellent in electric conductivity and mechanical properties by converting aluminum in a powder mixture of specific hardness, consisting of copper powder, aluminum-copper alloy powder, and copper oxide powder, into aluminum oxide and successively applying reduction treatment, compacting ...

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Work softening characterization of alumina dispersion ...

1-10-2007· In comparison, alumina dispersion strengthened copper (ADSC) alloys possess excellent high-temperature properties and retain sufficiently high values of electrical and thermal conductivity, . Therefore, ADSC alloys have been widely used as contacts, lead wires, electrodes, vacuum technique parts and conductors in high temperature electrical applications [1] , [3] , [4] .

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Abnormal grain growth in alumina dispersion …

Alumina dispersion-strengthened copper possesses high strength at elevated temperatures combined with high electrical and thermal conductivity .The reinforcing particles, which are stable up to the melting point of copper, pin the grain boundaries without significant degradation of the conductivities due to the low volume fraction , .Because of their superior properties, these composite are ...

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JPH08109422A - Production of alumina dispersion ...

PURPOSE: To produce an alumina dispersion strengthened copper capable of producing an electric wire excellent in electric conductivity and mechanical properties by converting aluminum in a powder mixture of specific hardness, consisting of copper powder, aluminum-copper alloy powder, and copper oxide powder, into aluminum oxide and successively applying reduction treatment, compacting ...

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Recrystallization of alumina dispersion strengthened ...

1. Introduction. Alumina dispersion strengthened copper (ADSC) offers a high strength at elevated temperatures as well as at room temperature .The high temperature strength retention is mainly attributed to the presence of uniformly dispersed fine alumina particles, which are thermally stable.

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Characteristics of alumina particles in dispersion ...

Abstract. Two types of alumina dispersion-strengthened copper (ADSC) alloys were fabricated by a novel in-situ reactive synthesis (IRS) and a traditional internal oxidation (IO) process. The features of alumina dispersoids in these ADSC alloys were investigated by X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy.

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Properties and Fabrication of Alumina Dispersion ...

Properties and Fabrication of Alumina Dispersion Strengthened Copper Alloy with High Softening Temperature. Article Preview. Abstract: Cu-Al 2 O 3 alloy combine both high electronic conductivity and high softening temperature. Cu-Al 2 O 3 alloy was fabricated by internal oxidation and hot extrusion methods in the present investigation.

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Characterization of Dispersion Strengthened Copper with ...

The copper matrix has been dispersion strengthened with 3wt.%Al2O3 by mechanical alloying. Commercial alumina powder with an average particle size of 0.75µm was used for alloying. The mechanical alloying process was performed in a planetary ball mill up to 20h in air. After milling all powders were treated in H2 at 400

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Microstructure evolution of alumina dispersion ...

Microstructure and texture evolution of Cu–0.23%Al 2 O 3 dispersion strengthened copper alloy, deformed at room temperature or cryogenic temperature, were investigated. The main textures in hot-extruded specimen were Brass {011} <211> and Cube {100} <100>. Textures of Brass {011} <211> and Goss {011} <100> were observed in specimen after deformation at room temperature; while textures …

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STUDIES ON ALUMINA DISPERSION-STRENGTHENED COPPER ...

STUDIES ON ALUMINA DISPERSION-STRENGTHENED COPPER COMPOSITES 3 where ρg is the green density of sample, ρT is the theoretical density of the composite, ρCu and ρAl2O3 are the theoretical densities of copper and alumina, m is the weight of sample, v is the volume of the sample, vol% Cu and vol% Al2O3 are the volume percentages of copper and alumina. Then the pellet …

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Al2O3-Cu

Alumina dispersion strengthened copper alloy (ODS & Al2O3-Cu) is graded C15715, C15740 and C15760. They consist of a pure copper matrix containing finely dispersed sub-microscopic particles of Al203 which act as a barrier to dislocation movement. The dispersed Al2O3 is thermally stable so that it acts to retard recrystallization of copper.

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STUDIES ON ALUMINA DISPERSION-STRENGTHENED COPPER ...

STUDIES ON ALUMINA DISPERSION-STRENGTHENED COPPER COMPOSITES 3 where ρg is the green density of sample, ρT is the theoretical density of the composite, ρCu and ρAl2O3 are the theoretical densities of copper and alumina, m is the weight of sample, v is the volume of the sample, vol% Cu and vol% Al2O3 are the volume percentages of copper and alumina. Then the pellet …

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Characteristics of alumina particles in dispersion ...

Two types of alumina dispersion-strengthened copper (ADSC) alloys were fabricated by a novel in-situ reactive synthesis (IRS) and a traditional internal oxidation (IO) process. The features of alumina dispersoids in these ADSC alloys were investigated by X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy.

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Properties and Fabrication of Alumina Dispersion ...

Properties and Fabrication of Alumina Dispersion Strengthened Copper Alloy with High Softening Temperature. Article Preview. Abstract: Cu-Al 2 O 3 alloy combine both high electronic conductivity and high softening temperature. Cu-Al 2 O 3 alloy was fabricated by internal oxidation and hot extrusion methods in the present investigation.

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Influence of brazing conditions on the strength of brazed ...

Brazing of alumina dispersion-strengthened copper (DS Cu) to 316 stainless steel were conducted in order to investigate the influence of filler metals and brazing conditions on the joint strength. The brazing were performed with a silver-base (BAg-8) and three kinds of gold-base (BAu-2,4,11) filler metals with varying brazing joint clearance and brazing time.

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Characteristics of alumina particles in dispersion ...

Characteristics of alumina particles in dispersion-strengthened copper alloys Characteristics of alumina particles in dispersion-strengthened copper alloys Zhang, Xue-hui; Li, Xiao-xian 2014-11-12 00:00:00 Two types of alumina dispersion-strengthened copper (ADSC) alloys were fabricated by a novel in-situ reactive synthesis (IRS) and a traditional internal oxidation (IO) process.

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Cryogenic properties of dispersion strengthened copper for ...

through 6 are composed of alumina dispersion-strengthened copper. This is a copper matrix composite with aluminum oxide ceramic particles Al 2O 3 as reinforcement component.

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MDPI - Publisher of Open Access Journals

Title / Keyword. Author / Affiliation. Journal

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Silver Tin Oxide Contact | Electrode Manufacturers in India

Micrograph of Alumina strengthened Copper Alumina is well dispersed in copper. Oxide dispersion strengthened copper has been identified as an effective method to increase copper strength without affecting its electrical and thermal properties.

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Microstructure evolution of alumina dispersion ...

Microstructure evolution of alumina dispersion strengthened copper alloy deformed under different conditions Ling LI1, Zhou LI1,2, Qian LEI2, Zhu XIAO3, Bin LIU1, Na LIU1 1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. State Key Laboratory of Powder Metallurgy, Changsha 410083, China; 3.

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What is an oxide dispersion strengthened (ODS) alloy? - …

Oxide dispersion strengthened alloys (ODS alloys) typically consist of a high temperature metal matrix - such as iron aluminide, iron chromium, iron-chromium-aluminium, nickel chromium or nickel aluminide - with small (5-50nm) oxide particles of alumina (Al 2 O 3) or yttria (Y 2 O 3) dispersed within it.. Iron-based and nickel-based oxide dispersion strengthened alloys exhibit good corrosion ...

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