NDLI: SiC / Aluminum Composites Fabricated by in situ Processing using Reactive Infiltration Aid

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SiC / Aluminum Composites Fabricated by in situ Processing using Reactive Infiltration Aid

Content Provider	Semantic Scholar
Author	Kobashi, Makoto Hirako, Masaru Kanetake, Naoyuki
Copyright Year	2010
Abstract	Pressureless infiltration, as one of the fabrication methods of metal or intermetallics matrix composites, is an attractive process on account of its cost-effectiveness and capability of producing near-net-shape and high ceramic fraction composites. However, good wettability between a solid powder preform and a liquid metal is required to realize the spontaneous infiltration. In this paper, the effect of blending the reactive infiltration aid in the SiC powder preform on the spontaneous infiltration of molten aluminum was investigated. As the reactive infiltration aid, titanium, nickel, titanium oxide (TiO2), nickel oxide (NiO) and boron carbide (B4C) powders were selected. The infiltration aid was blended with SiC powder by various volume fractions (0~40vol%), and then compacted to make a preform. The compacted powder preform and an aluminum ingot were set in a crucible, and heated in argon gas atmosphere. Molten aluminum successfully infiltrated into the powder preform by adding the infiltration aids except for NiO and TiO2. After infiltration, aluminum matrix composites with dispersions of SiC and in situ formed particles were obtained. Both processing temperature and time were important parameters to reduce the residual voids. The SiC powder tended to decompose vigorously when nickel powder was used as the infiltration aid, whereas such decomposition was not observed when titanium or (Ti+B4C) powder was selected.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://icaa-conference.net/ICAA12/pdf/P045.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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