s:,, "dd", give Tianmen more support Huh?"
Wan Changchun couldn't help but exclaimed softly after the knife was carved.
Su Yichen who was standing aside was also stunned, because he clearly saw that the tip of the knife in Wan Changchun's hand did not leave any scratches on the surface of the building.
Hardness is a technical term in physics.
The ability of a material to locally resist hard objects from being pressed into its surface is called hardness.
The local resistance of a solid to the invasion of external objects is an indicator for comparing the softness and hardness of various materials.
According to different testing methods, hardness also has different standards.
According to the classification of hardness, it can be divided into: Rockwell hardness, Brinell hardness, Vickers hardness, Leeb hardness, Shore hardness, Barcol hardness, Knoop hardness, Wehr hardness.
Among the eight categories of hardness, Rockwell hardness, Brinell hardness, and Vickers hardness are basically selected.
The hardest substance in nature is diamond.
According to the Mohs hardness scale that appeared in 1822, diamond is the tenth grade.
Among single metals, chromium has the highest hardness, with a grade between 8.5 and 9, second only to diamond.
Of course, in some laboratories, harder alloy materials have been successfully synthesized.
The hardness of this alloy material has almost reached ten levels or even higher.
For example, tungsten carbide, a compound of tungsten and carbon elements, is harder than tungsten steel.
It is comparable to the hardest diamond in nature.
Although the knife in Wan Changchun's hand is inconspicuous, it is made of tungsten steel with a hardness of 10k Vickers.
What's more, if you scratch hard on the surface of a hard object, even if it is the hardest diamond, the material of this knife can still make scratches.
But what surprised Wan Changchun and Su Yichen was that they failed to leave any marks on the surface of the building.
This was simply incredible.
"Teacher Wan, I'll do it," Su Yichen said quickly.
Wan Changchun handed the knife to Su Yichen.
Compared with Su Yichen, he was older after all, and it was possible that he was not strong enough.
Maybe someone else could do it.
Taking the knife, Su Yichen held the handle of the knife in the most suitable posture, put the tip of the knife against the outer wall first, then took a deep breath, used all his strength on his wrist and slashed hard.
When he felt the friction coming from the blade, , Su Yichen was slightly happy, then put down the knife and looked at the outer wall carefully, but after taking a look, he was instantly dumbfounded.
"How is this possible?"
Su Yichen couldn't believe his eyes.
The outer wall of the building was still the same as before, without any scratches on it.
You must know that the strength he just exerted could have scratched deep marks on its surface even if it were replaced by a diamond.
Wan Changchun frowned deeply, but he was also surprised.
Although he didn't know what kind of metal or alloy it was, what kind of metal or alloy it was, or even where this building came from, and what its purpose was, these unexpected discoveries in the desert It doesn't matter.
What's important is that they discovered an astonishing fact, that is, its hardness must exceed the tenth level.
As for how much it reaches, it is impossible to measure it under the current circumstances.
The inability to leave traces on the surface also means that they cannot take a small sample from the whole.
Su Yichen looked at Wan Changchun with questioning eyes.
After thinking for a while, Wan Changchun took out a match, lit a strip of cloth, and then carefully raised it high, trying to use the outer flame to touch the surface.
The strip of cloth was not big, so it didn't take long to burn.
It was almost burned out after a few minutes.
Wan Changchun threw away the cloth strip that had not been completely extinguished, and then quickly touched the area that had just been barbecued with his fingers.
However, after a short touch, his eyebrows suddenly raised, and then he pressed his entire palm on it.
When Wan Changchun made this move, Su Yichen almost shouted, but he held back the words because he knew that Wan Changchun would never do this recklessly.
Fire is something that people often come into contact with in their daily lives.
It can even be said that human evolution is inseparable from fire.
The legend of drilling wood to make fire has been passed down for thousands of years.
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Ancient humans evolved from apes to primitive humans, and then slowly became real humans.
Fire has always accompanied the development of human society.
Luminescence and heat are produced in burning substances, and the release of this energy is fire.
During the combustion process, the flame is divided into three parts: outer flame, inner flame and flame core.
Among these three parts, the temperature of the outer flame is the highest.
The outer flame temperature of alcohol lamps commonly used in laboratories can reach about 600 degrees.
The temperature of furnace fires, that is, ordinary household media ball furnaces, can reach about 800 degrees.
The temperature of industrial hydrogen-oxygen flames is even higher, reaching 2500 degrees to 3000 degrees. degree or so.
Although the temperature at which Wan Changchun lit the cloth strips just now is not comparable to these, and it cannot even reach the 600 degrees temperature of the alcohol lamp, it is at least about 200 degrees.
Such high temperatures will cause heat conduction when grilling on the metal surface. , its temperature minus the loss part should be around 180 degrees.
But now, Wan Changchun put his entire palm against the grilled area, but there was no reaction of it being hot.
This violated the properties of metal, and Su Yichen was dumbfounded.
"Teacher Wan, is it possible?"
Wan Changchun nodded solemnly, moved his palm, and motioned for Su Yichen to try it too.
Su Yichen followed Wan Changchun's example and raised his hand to press it.
When his palm touched the surface, he was even more shocked than before.
"This."
Su Yichen raised his hand in disbelief and pressed it again, and then touched a position slightly away from the barbecue area, but the temperature from the palm of his hand was almost the same, not to mention hot, not even the slightest bit warm.
No signs can be felt, no matter which part it is, at least there is no difference in feeling.
For a moment, Su Yichen thought he was dreaming.
This situation that completely violated physical phenomena made him extremely surprised.
But the fact was before his eyes, and he couldn't believe it.
"Lao Wan, Xiao Su, how are you?
Can you go?"
Hu Zhijun stood not far away and saw Wan Changchun and Su Yichen circling and gesticulating around the building.
Now they were lighting, burning and roasting. , and he was touching it back and forth with his hands in a strange way.
The more he looked at it, the more puzzled he became.
He doesn't understand what's so interesting about this thing.
Isn't it just a ruin in the desert?
Although it is strange and huge, so what?
If it is really worth studying, at least wait until they rush to the supply depot and contact the base before proceeding.
It's not too late.
At worst, we can just send more people and equipment from the base to dismantle the whole thing and move it back.
Why waste time here?
Seeing that the agreed half hour was almost up, Hu Zhijun couldn't help but ask, but Wan Changchun and the others ignored Hu Zhijun at all and continued to knock on the surface of the building without knowing what they were doing.
Frowning slightly, Hu Zhijun was about to urge him a few times, but after thinking about it, he decided to forget it.
In any case, Wan Changchun and Su Yichen are experts and scientists at the base.
According to what the head of the base said, these experts must be respected and respected.
Give them the greatest convenience and assistance.
Since they want to study for a while, give them some more time.
Thinking of this, Hu Zhijun planned to prepare to leave at any time with Gudamai, but when he turned around and was about to call Gudamai, he saw Gudamai, who was pale and looking at this person with straight eyes.
Building, his eyes were filled with fear, and even his body was trembling slightly, as if he had seen something terrible.
"Gudamai Gudamai" Seeing Gudamai's abnormal expression, Hu Zhijun was a little surprised.
He walked towards Gudamai and shouted a few times.
"Platoon leader."
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Gudamai's eyes slowly rolled, and he stammered to Hu Zhijun: "I, I remember, I finally remembered."
"Remember, what did you remember?"
Hu Zhijun asked, a little confused.
"I remember what it is."
Gudamai raised his hand and pointed at the strange building in front of him, and said with a trembling voice: "This is the palace of Alivasti.
The legendary Alivasti.
I am so stupid.
I have already You should remember it, platoon leader, let’s go, let’s get out of here as soon as possible.
If Alivasti wakes up, we won’t be able to run away.”
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