Alloy handle

An alloy is a substance with metallic properties, formed by combining two or more metals with metals or non-metals through a certain method.

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An alloy is a substance with metallic properties, synthesized by combining two or more metals with metals or non-metals using a specific method. It is generally obtained through melting into a homogeneous liquid and solidification. According to the number of constituent elements, it can be divided into binary alloys, ternary alloys, and multi-component alloys.

Human production of alloys began with the making of bronze ware. The earliest producers of alloys in the world were the ancient Babylonians, who began refining bronze (an alloy of copper and tin) 6000 years ago. China is also one of the earliest countries in the world to research and produce alloys. During the Shang Dynasty (more than 3000 years ago), bronze (copper-tin alloy) technology was already very developed; around the 6th century BC (late Spring and Autumn period), sharp swords were already forged (and heat-treated).

An alloy is a macroscopically homogeneous, multi-element chemical substance containing metallic elements, generally possessing metallic properties. Any element can be used as an alloying element, but the elements added in large quantities are still metals. The most basic and independent substance that constitutes an alloy is called a component, or simply a component. An alloy composed of two components is called a binary alloy, an alloy composed of three components is called a ternary alloy, and an alloy composed of more than three components is called a multi-component alloy. In the solid state, an alloy may be a single-phase or a multi-phase mixture; it may be crystalline, or it may be in a quasicrystalline or amorphous state. In crystalline alloys, depending on the differences in atomic radius, electronegativity, and electron concentration of the constituent elements, the phases that may appear include solid solutions that maintain the same structure as the base pure element and intermediate phases that do not have the same structure as any of the constituent elements. Intermediate phases include normal valence compounds, electron compounds, Laves phases, σ phases, interstitial phases, and complex interstitial compounds. The phases that may appear in an alloy under equilibrium conditions can be determined from the phase equilibrium diagram.

The structure and properties of the constituent phases in an alloy play a decisive role in the alloy's performance. At the same time, changes in the alloy microstructure, i.e., changes in the relative amounts of phases in the alloy, the grain size, shape, and distribution of the phases, also have a significant impact on the alloy's performance. Therefore, by combining various elements to form various different alloy phases and then undergoing appropriate processing, various different performance requirements can be met.

The term alloy is also used in polymer chemistry. It refers to a composite material formed by blending a polymer or copolymer with another polymer or elastomer under certain conditions, such as blending styrene-acrylonitrile copolymer resin with butadiene-acrylonitrile rubber.