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单词 Eutectoid Point
释义

Eutectoid Point

英语百科

Eutectic system

A phase diagram for a fictitious binary chemical mixture (with the two components denoted by A and B) used to depict the eutectic composition, temperature, and point. (L denotes the liquid state.)
Four eutectic structures: A) lamellar B) rod-like C) globular D) acicular.
Solid-liquid phase change of ethanol water mixtures
Iron-carbon phase diagram, showing the eutectoid transformation between austenite (γ) and pearlite.

A eutectic system (US dict: yü-'tek-tik) from the Greek "ευ" (eu = easy) and "Τήξις" (teksis = melting) describes a homogeneous solid mix of atomic and/or chemical species, to form a joint super-lattice, by striking a unique atomic percentage ratio between the components — as each pure component has its own distinct bulk lattice arrangement. It is only in this atomic/molecular ratio that the eutectic system melts as a whole, at a specific temperature (the eutectic temperature) the super-lattice releasing at once all its components into a liquid mixture. The eutectic temperature is the lowest possible melting temperature over all of the mixing ratios for the involved component species.

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更新时间:2025/6/23 0:49:56