ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In order to estimate work of external force per unit area to infiltrate molten aluminuminto bundle of two types of carbon fibers which were PAN (polyacrylonitrile) based and pitch based,wettability of graphite by molten pure aluminum and aluminum – 2.0, 2.9 and 9.1 mass %magnesium alloy was measured using sessile drop method. Basal plane and prismatic plane exist onthe surface in the case of PAN and pitch based fibers, respectively. The wettability was examined inthe atmosphere of Ar + 3 vol. % H2 at 1189 K. Both the contact angle and the surface tension wereestimated using Young-Laplace equation. The surface tension decreased form 1.0 N/m at 0 mass %Mg to 0.7 mass % Mg at 9.1 mass % Mg. The contact angle between molten aluminum and basalplane or prismatic plane of graphite was 127º or 148º respectively. In the case of basal plane, thecontact angle increased with increasing magnesium content. In the case of prismatic plane, whereas,the contact angle decreased from 155º at 2.0 mass % Mg to 125º at 2.9 mass % Mg. The work ofexternal force for infiltration was calculated using Young’s equation. In the case of basal plane, thework was constant at 0.6 J/m2 regardless of magnesium content. In the case of prismatic plane, thework decreased with increasing magnesium content. It was found that the influence of magnesiumcontent on the work would be different between using PAN-based carbon fiber and usingpitch-based carbon fiber
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.877.pdf
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