"Hello."

Just as the three of them looked at each other, an extremely mechanical electronic synthesizer sounded in the three of them.

"Damn!" *3

Bai Yixuan reacted first: "You are...1?"

"Yes." The mechanical and electronic synthesizer sounded again, "Does the Moon Palace construction plan be implemented?"

Unlike zero, the sound of 1 is extremely rigid.

After Bai Yixuan and his teammates looked at each other, he said in a deep voice: "1, start immediately!"

The moment the order was issued, the entire Moon Palace base came alive again.

only……

Everything seemed to be fast-forwarded.

The travel speed of the surface rock cuttings collection vehicle suddenly increased several times.

Seeing the scene of the collection car crashing straight towards Yueyan in front of him, Xia Wanyi's eyes widened a little, and she couldn't help but exclaim involuntarily.

But the next second, the collection car drew a beautiful arc just right and bypassed the moon rock in front of him!

Not only the collection vehicle, but also the transportation efficiency of the track device has been increased several times instantly.

At the beginning, in order to subdivide ore types, the tracks were transported one by one.

But now...

Several tracks ran quickly without any pause. The seemingly messy ore sorting process exuded an indescribable sense of order.

"Damn..." Hong Fan looked at the scene in front of him blankly, "This is too exaggerated..."

Bai Yixuan's eyes were full of surprise.

This is just weak artificial intelligence!

If it's zero...

He shivered slightly.

He finally knew why Xia Guo has developed so rapidly during this period!

...

Earth.

"Professor, 1 has started working properly."

The voice of zero sounded in the office.

Lu Yongchang's tightly frown slowed down a little.

"Okay, I get it."

"By the way, Zero, please contact Academician Wei Rong."

"Tell him, I'll go to the Carbon Nanoon Laboratory right away."

“Yes, professor.”

...

Carbon Nanoon Laboratory.

"Hello Professor Lv."

As soon as Lu Yongchang walked into the laboratory, a middle-aged man with gray hair came up and said, "I will introduce myself, I am..."

"Academician Wei, I recognize you!" Lu Yongchang smiled and reached out to hold Wei Rong's right hand that was stretched forward, shook it hard and said in a deep voice, "The situation is urgent, I won't talk nonsense."

Wei Rong's expression became a little serious in an instant: "Professor Lu, you said."

"The cable material problem of space elevators has not been resolved yet."

Hearing Lu Yongchang's words, Wei Rong's expression moved slightly: "What Professor Lu means... is going to use carbon nanotubes to make cables for space elevators?"

Lu Yongchang nodded with satisfaction.

Talking to smart people is easy, and you can understand what he means with just one sentence.

"How is it? Is it possible?"

Wei Rong frowned in a little entangled manner.

After pondering for a while, he nodded, then shook his head quickly.

"In theory, this may exist."

"Professor Lu, you also know that the tensile strength of carbon nanotubes reaches 200gpa, about 100 times that of steel, but the density is only one-sixth of that of steel."

“In theory, this is indeed an ideal material for space elevators.”

"But...there are big problems in the current carbon nanotube preparation process, and most carbon nanotubes cannot even reach the centimeter level."

"And, the strength of carbon nanotubes is mainly reflected in the microscopic level."

"At the macro level, due to various reasons, its tensile strength is greatly reduced in value."

Lu Yongchang nodded slightly.

He naturally knew very well about these mechanical properties of carbon nanotubes.

After all, among the room temperature superconducting materials, he chose carbon nanotubes.

However, at that time, he used the excellent electrical properties of carbon nanotubes.

After pondering for a moment, he chuckled: "It's normal to have a problem, as long as we solve it."

"The point is that at present, carbon nanotubes are the most likely material to be space elevator cables, which is enough."

Wei Rong was stunned for a moment, then nodded vigorously, with a bit of admiration in his eyes: "Well said, professor."

...

In front of the experimental table, Lu Yongchang silently looked at the carbon nanotube sample prepared for the first time in front of him.

The length of the carbon nanotube is about one meter and the tensile strength reaches 80gpa.

Logically speaking, this is already an extremely excellent carbon nanotube.

But this is obviously not enough to meet the requirements of space elevators.

Space elevator, as a necessary technology for planetary civilization to move towards the universe, contains extremely high technical content.

One end of the elevator is on the ground and the other end is on a geostationary orbit 36,000 kilometers away, connected by only a cable in the middle.

As for why it doesn't fall off...the principle is simple.

Just the centrifugal force generated by the earth's rotation is required to offset or be greater than the downward gravity to keep the cable tight.

Of course, while maintaining the above conditions, the overall center of mass of the elevator should be equal to or higher than the geostationary orbit.

Considering the weight of the cable itself and the various transportation equipment built with the cable, if you want to keep the overall center of mass of the elevator in the geostationary orbit, in addition to increasing the mass of the balance object at the other end, you can only extend the length of the cable.

When the balance object is located in a geostationary orbit of 36,000 kilometers, it is obviously unrealistic to ensure that it does not fall off, the mass of the balance object must be infinitely large.

Therefore, under normal circumstances, the highest point of space elevators is generally about 90,000 kilometers away from the earth's surface.

Under these prerequisites, as the most important material for space elevators, the cables connecting both ends need to withstand extremely terrifying pulling forces!

Of course, in addition to tensile resistance, there are many conditions required for cables, such as stable materials, not easy to destroy, etc.

"This is the most powerful carbon nanotube made in the laboratory at present." Wei Rong's voice came from the side, interrupting Lu Yongchang's thoughts.

He shook his head slowly: "Not enough, far from enough."

Wei Rong smiled bitterly.

Of course he knew it wasn't enough.

For space elevators, the tensile strength of 80gpa is obviously far from enough.

You should know that even the most basic space elevator requires that the cable has a tensile strength of at least 100gpa!

"It costs at least 1,000gpa..." Lu Yongchang murmured to himself.

After hearing this, Wei Rong's eyes widened.

1000gpa?!

This is like a fool!

"Professor Lu, this is probably a bit..." Wei Rong's face showed a little embarrassed.

It’s not that he poured cold water. As a scholar of materials who specializes in carbon nanotubes, he is extremely familiar with the performance of carbon nanotubes.

1000gpa, it cannot be said that it is impossible, but the possibility of achieving this intensity...
Chapter completed!