At a time when mankind has learned to get metals from the ore and process it began a new round of technological progress, which is still ongoing.If before the plastic back in 1835 the basic durable materials that have been available to people is a metal and wood, now added to the list of plastics.Nevertheless, it is impossible to imagine the area where there have been used metals and their alloys.It can be said that progress in its present form was made possible thanks to them.
It is clear that the physical and chemical properties of metals have been very well studied.Now to the main one sign each person.In this paper, we consider in detail the overall physical properties of metals.However, in order not to confuse the two terms, is a short list of what exactly is meant by chemical properties.
First of all, the ability of metals to interact with gases, water and other substances.This may also include solubility.All this determines oxidation, corrosion resistance and so forth.
Physical properties of metals represented conductivity, density, permeability, specific heat, and coloration, moldability and others. A complete list is quite large, so is omitted.We list only the basic physical properties of metals.
Imagine a situation: winter cold.Outside the two benches - wood and metal.Which is cooler?Even a child knows that metal.However, the temperature is the same, hence the term "cold" is not applicable here.What is the feeling of cold?The physical properties of metals.In particular, the thermal conductivity and specific heat.Due to the peculiarities of the structure of the atomic lattice metal much faster heat energy consumption, with uniform heating.This feature allows easy connection by welding or soldering.
known that for some metals smelting need high temperatures, while others can literally melt in their hands.For example, sodium metal is transferred to liquid form even at 100 degrees (a little less), so feel metallurgist can be anyone.His opposite - tungsten (of it made filaments in lamps), which melts at 3400 degrees.
Of course, the physical properties of these metals are not exhausted.Imagine that you need to make and install a metal door.Precise fitting dimensions without the "reserve" will lead to the fact that in the hottest time of the year because of the linear thermal expansion door can not be closed (or open).Accordingly, with a decrease in temperature of the product size slightly reduced by a factor F. All these factors need to be considered.
metals have great importance for electrical engineering.Of those executed almost everything from conductors to enclosures of electrical equipment.For production use copper wires and aluminum, since they have the least resistance to the passage of charged particles.It should be noted that the best characteristics for gold and silver, but because of the high cost of these metals, they are used restrictedly.Interconnected property - is the electrical resistance.Because these materials are manufactured heating spiral filament and straight. Representatives of this group - metal is tungsten, nichrome (alloy).
One of the most important elements of circuits - a coil.It suffices to make it the core of magnetic material, as a mode of operation fundamentally changed.This is due to the magnetization of the metal.
Get the required characteristics of the product can only be the case if you know the physical properties of the metal used.
