Forming an alloy why the melting point of one metal cannot be higher than the boiling point of anoth

If the melting point of one metal is higher than the boiling point of another metal, then when the metal reaches the melting point and melts into a liquid state, the other metal has reached or even exceeded the boiling point and vaporizes into a gaseous substance, so how can the two melt together to form an alloy?

First, most alloys have a melting point lower than the melting point of any of their constituent metals. 1.Middle School Chemistry:

The melting point of an alloy is lower than that of the substances that make up it. 2.College Chemistry:

The answer is not necessarily, because: there are generally three types of alloys: (1) eutectic mixtures (2) metal solid solutions (3) metal compounds where the melting point of (1) is lower than that of the substances that make it up, but the hardness is higher than that of all of them; (2) The melting point and hardness are higher than those of the substances that compose it; (3) There are two kinds:

Normal valence compounds and electronic compounds, where the melting point and hardness of a normal valence compound are higher than those of the substances that compose it.

Metals are solid at room temperature, have you ever seen a solid boiling?

The first floor is not right, even if it is in the gaseous state, it is only a part, but the remaining part of the liquid state can still be synthesized.

Halo = = lz Why are you asking this kind of question here? It is recommended that you ask questions again in a different place, and few people will do it here. At least I won't|||Khan

It should not be melted together to form an alloy handle.

The melting point of a solid is related to whether the atoms are arranged regularly or not. In pure metals, all the atoms are the same size and arranged in a very regular manner. However, the atoms in the alloy are of different sizes, and the arrangement is not as neat as that of pure metal, so that the interaction force between the atoms is reduced.

Therefore, the melting point of most alloys is generally lower than that of the constituent metals.

The structure and properties of the constituent phases in an alloy play a decisive role in the properties of the alloy. At the same time, the change of alloy structure, that is, the relative number of phases in the alloy, the grain size, shape and distribution of each phase, also has a great impact on the properties of the alloy. Therefore, the combination of various elements to form a variety of different alloy phases may be met with a variety of different performance requirements after appropriate treatment.

First of all, the melting point of an alloy is determined by the force between the particles inside the substance. When it is a pure metal, it is combined with metal bonds between the atoms of the same metal, which has a strong force and a high melting point; When alloyed, when foreign atoms enter the crystal, the metal bonds are broken, and the metal is arranged chaotically inside, because the crystal lattice in the eutectic alloy is distorted, it is not as stable as the original, and to break the chemical bonds between them, less energy is required than the original, that is, the melting point will be reduced. At this time, the internal energy of the overall metal increases, resulting in a decrease in the melting point.

Therefore, most alloys have a lower melting point than pure metals.

Because the crystal lattice in the eutectic alloy is distorted, it is not as stable as the original, and to break the chemical bonds between them, less energy is required than the original, that is, the melting point will be lower.

This ......Not necessarily, right? If you look at the phase diagram of copper-nickel alloy, the melting point of copper is 1084 degrees Celsius, the melting point of nickel is 1455 degrees Celsius, and the melting point of the alloy is between the two, and there is no melting point lower than the melting point of each component (copper or nickel)?

Check the dependence of non-electrolyte dilute solutions yourself.

1. For substances with different crystal types, generally speaking: atomic crystals, ionic crystals, molecular crystals, and metal crystals have a wide range of melting points.

2. Atomic crystal: the shorter the bond length and the greater the bond energy of the atomic crystal, the more stable the covalent bond is, the higher the melting and boiling point of the substance, and vice versa. Such as:

Diamond (C—C) Silicon Carbide (Si—C) Crystalline silicon (Si—Si).

3. Ion crystal: The smaller the anion and cation radius and the higher the charge number in the ion crystal, the stronger the ionic bond and the higher the melting and boiling point, and vice versa.

Such as kf kcl kbr ki, cao kcl.

4. Metal crystal: the more the number of valence electrons of the metal atom in the metal crystal, the smaller the atomic radius, and the more the electrostatic interaction between the metal cation and the free electron.

Strong, the stronger the metallic bond, the higher the melting boiling point, and vice versa. Such as: na mg al.

The melting and boiling point of an alloy is generally lower than that of the pure metals of its components. Such as aluminum-silicon alloy pure aluminum (or pure silicon).

5. Molecular crystals: The greater the intermolecular force of molecular crystals, the higher the melting and boiling point of the substance, and vice versa. (Molecular crystals with hydrogen bonds, melting boiling point.)

abnormally high) e.g. h2o h2te h2se h2s, c2h5oh ch3och3.

1) For molecular crystals with similar composition and structure, the larger the relative molecular mass, the stronger the intermolecular force, and the higher the melting and boiling point of the reflux.

Such as: CH4 SIH4 GEH4 SNH4.

2) Substances with different compositions and structures (similar to the mass of the oak and the pair), the greater the molecular polarity, the higher its melting and boiling point, such as the melting boiling point.

co＞n2，ch3oh＞ch3ch3。

3) In the oils formed by higher fatty acids, the greater the degree of unsaturation, the lower the melting and boiling point. Such as:

c17h35cooh＞c17h33cooh；

4) Hydrocarbons, halogenated hydrocarbons, alcohols, aldehydes, carboxylic acids and other organic substances generally increase with the increase of the number of carbon atoms in the molecule, such as C2H6 CH4, C2H5Cl Ch3Cl, CH3COOH HCOOH.

5) Isomers: The isomers of chain hydrocarbons and their derivatives decrease with the increase of branching. Such as:

ch3(ch2)3 ch3 (positive) ch3ch2ch(ch3)2(heterogeneous) (ch3)4c (new). When the isomer of aromatic hydrocarbons has two substituents, the melting point decreases according to pair, ortho and meta. (The boiling point decreases by adjacent, intermediate, and para-position).

The condition for the two metals to form an alloy is that the boiling point of the low melting point metal exceeds the melting point of the high melting point metal. Otherwise, even if the temperature reached vaporizes the low-melting metal, the high-melting metal will not melt.

The modification conditions of the alloy formed by the two metals are that the boiling point of the low melting point metal is higher than the melting point of the high melting point metal.

Even if the temperature reached vaporizes the low-melting metal, the high-melting metal will not melt.

The melting point is determined by the force between the particles inside the substance, and the atoms of the same metal are bonded by metallic bonds, which have strong force and high melting point; When foreign atoms enter the crystal, the metal bonds are broken, and the metal is chaotic, and the internal energy of the whole metal increases, resulting in a decrease in the melting point. This is why the melting point of most alloys is lower than that of constituent metals.

However, the melting point of the alloy is lower than that of the pure metals that make up the alloy, which is conditional.

When a component of an alloy is dominant, the melting point is close to and below that of the metal.

For example, when the iron content of tungsten ferroalloy is less, the melting point is close to that of tungsten but lower than that of tungsten. At this time, the melting point is higher than that of iron.

The melting point actually represents the magnitude of the force between substances, and the particles between the same substances are evenly distributed, so the force is strong and the melting point is high; Whereas, alloys have many different substances, and the particles are unevenly distributed, so the force is weak and the melting point is low.

The magnitude of the force between metal ions is determined.