Abstract
The wettability of molten aluminum alloys, containing 5 percent of V, Nb, and Ta in Va group and Cr, Mo, and W in VIa group, to SiC was measured by the dipping method. Wetting of SiC in all the alloys occurs after a certain period. The period is shortened by alloying all elements of Va and VIa groups. These elements without Cr accelerate the wetting rate. EPMA analysis shows formation of (V2C + V) and TaC at the boundary in the alloys containing V and Ta, respectively. The reaction rate is expressed by an equation proportional to the number of nuclei for wetting per unit interfacial area and unwetted ratio of the interface (1-alpha). Activation energy for wetting approximately 330 kJ/mol is obtained through temperature dependence of wetting of Al-V alloy. 7 references.
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