World News: 11:53 GMT Tuesday 3rd December 2019. [Research and Markets via Globe Newswire via SPi World News]
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A hypereutectic alloy is metallic alloy with a composition beyond the eutectic point. A typical alloy may have a substrate and a primary alloying element. The eutectic point refers to the maximum mass fraction of the primary alloying element at which the primary alloying element is totally soluble in the substrate at operating temperature. In a hypereutectic alloy, a percentage of the primary alloying element is soluble in the substrate, which is called eutectic element and the rest is not soluble, which is called primary element.The substrate in aluminum-silicon (Al-Si) alloy is aluminum, whereas the primary alloying element is silicon. All silicon in the alloy can be totally soluble in aluminum only if the mass fraction of silicon is smaller than or equal to nearly 12%. Thus, the Al-Si alloy's eutectic point is 12 wt % and hypereutectic Al-Si alloy has more than 12 wt % silicon present within it. The mass fractions of silicon in a hypereutectic Al-Si alloy typically ranges from 13 wt % to 26 wt %. For a hypereutectic Al-Si alloy with 16 wt % of silicon, only 12% is soluble, which is eutectic silicon, and the other 4 wt % of silicon is not soluble; this is called primary silicon.
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Globe Newswire: 11:53 GMT Tuesday 3rd December 2019
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