Wettability of graphite against liquid aluminum and effect of alloying elements on it.
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概要
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The effect of the alloying element on the wettability of graphite to liquid aluminum was investigated by the dipping method instead of the sessile drop method. In the initial stage of the wetting process, there is an incubation period τ which is similar to the wetting process between SiC and liquid aluminum and was decreased by alloying magnesium and IVa and Va group elements in the element periodic table. The wetting process can be analysed from the view point of wetting nucleation rate. The rate constant for wetting, k0, increase by alloying IVa and Va group elements. Both values of k0 and τ have a periodic nature against atomic number of alloying elements. The activation energy for wetting is in the range between 365 and 390kJ/mol for all aluminum alloys and is close to the bonding energy of carbon, 348kJ/mol, given by Pauling. The wetting reaction is limitted by the decomposition of graphite.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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