Is it a chemical or physical change in metal alloys?

It is a physical change, alloy refers to the product of uniform mixing of two or more metals in a high-temperature molten state, in which there must be metals, and the other can be metals or non-metals, for example, the iron we use is an alloy of iron and carbon, and the other common is magnesium aluminum alloy. The melting point of the alloy is lower than that of its constituents, but the hardness is much higher.

There is no chemical change in the alloy, that is, no new substances are formed, they are just mixed at high temperatures, so it is a physical change.

There are three types of alloys.

Metal solid solution: i.e. solid solution. For example, brass.

Gold-silver alloys, which form as physical changes.

Metal interferants: Compounds formed between metals. Such as zinc copper (ZNCU), iron carbide (Fe3C) dust notice, copper-tin rolling brother letter gold.

Wait. Metal interferants are not available for the usual valency.

Interpretation. Such alloys are formed as chemical changes.

Mechanical mixture: steel, pig iron, bronze are these large wheel alloys. Such alloys are formed as physical changes. I got it.

The arrangement of the atoms is different.

The formation of alloys often improves the properties of elemental elements, for example, steel is stronger than its main constituent element, iron. The physical properties of an alloy, such as density, reactivity, Young's modulus, electrical and thermal conductivity, may be similar to the constituent elements of an alloy, but the tensile and shear strength of an alloy is often very different from that of the constituent elements. This is due to the fact that the arrangement of atoms in alloys is very different from that in elemental matter.

The metaphor of the various elemental connections is apt.

Physical changes, the properties of each do not change.

Physical change.

It also retains the chemical properties of the original metal.

Metal solid solution: i.e. solid solution. For example, brass, gold-silver alloys, such alloys are formed as physical changes.

Metal interferants: Compounds formed between metals. Such as zinc copper (ZNCU), iron carbide (Fe3C), copper-tin alloy, etc. Metal interferants cannot be explained by the usual valencies.

Such alloys are formed as chemical changes.

Mechanical mixtures: steel, pig iron, bronze are such alloys. Such alloys are formed as physical changes.

The definition of an alloy in junior high school is "a mixture of one metal, another metal or non-metal, with metallic properties". The definition of chemical change is "a change that produces a new substance is a chemical change." "If you look at it in this narrow sense, the process of forming an alloy does not produce new substance, so it is a physical change.

None of the above answers are accurate.

An alloy is a material or substance in the form of a solid solution or compound composed of two or more chemical components.

Solid solutions are impurities that form defects and are physical changes.

It's a physical change. Chemical change requires the formation of new material molecules. It's just an alloy, but it changes the hardness of the metal, the melting and boiling point.

Synthetic materials, also known as man-made materials, are materials that are artificially processed by chemical methods or polymerization, and their characteristics are different from those of raw materials, such as plastics, glass, alloys, etc.

It is a material composed of heterogeneous, heterogeneous, and special-shaped organic polymers, inorganic non-metals, metals and other materials as matrix or reinforcement, and is combined through a composite process. In addition to the properties of raw materials, new properties can be generated at the same time.

A material or substance in the form of a solid solution or compound consisting of two or more chemical components.

Therefore, synthetic materials are chemical changes, and alloys and composites are physical changes.