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:
The chemical element and its valence at the fracture surface of SiCp/Al2O3-Alcomposites synthesized by oxidative infiltration of Al melt were analyzed quantitatively usingX-ray photoelectron spectrometer(XPS), the percentage content of various phase at fracture surfacewas determined accordingly. Additionally, the volume fraction of different phase in the compositeswas meassured by optical metallographic examination of the three-dimensional section. And then,by the comparison of phase content between fracture surface and section of the composites, thepreference for the crack penetrating various phases of the composites was identified ,which in turnmicro-fracture mechanisms of the composites were revealed quantitatively. It is proved that SiCparticle size has a critical influence on the percent content of co-continuous Al2O3 and Al phases, aswell as the micro-fracture mechanisms of this kind of composites. Based on the analysis ofmicro-fracture mechanisms, the moderate size (about 10μm) of SiC particulate would be beneficialto the mechanical properties of composites, the tested results of mechanical properties under roomand elevated temperature verified the hypothesis
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1643.pdf
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