Microstructure and electrical conductivity of high volume Al2O3-reinforced copper matrix composites produced by plasma spray

A mixture of Cu/alpha-Al2O3 (30:70 in vol.%) feedstock powder was plasma-sprayed onto a graphite substrate in order to investigate the electrical conductivity and microstructure of the deposits. As input power increased, the amount of phase transformed gamma-Al2O3 and the volume fraction of Al2O3 in...

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Bibliographic Details
Published inSurface & coatings technology Vol. 190; no. 2-3; pp. 448 - 452
Main Author KANG, Hyun-Ki
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier 21.01.2005
Subjects
Applied sciences
Corrosion
Corrosion environments
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Other topics in materials science
Physics
Plasma
Electrical conductivity
Plasma processing and deposition
Electrical properties
Hot spraying
Surface treatments
Electrical properties and measurement
Composite materials
Plasma arc spraying
Oxidation
Copper
Microstructure
Alumina
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Summary:A mixture of Cu/alpha-Al2O3 (30:70 in vol.%) feedstock powder was plasma-sprayed onto a graphite substrate in order to investigate the electrical conductivity and microstructure of the deposits. As input power increased, the amount of phase transformed gamma-Al2O3 and the volume fraction of Al2O3 in the plasma-sprayed composites increased, while the electrical conductivity decreased. Cuprite (Cu2O) was also found in the deposits. The electrical conductivities of the plasma-sprayed Cu/Al2O3 composites were compared to those of the different predictive models. It was revealed that the two-phase self-consistent predictive model had the closest agreement with the measured values.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2004.02.002